NY/T 5165-2002 Technical specification for breeding of snakehead fish for pollution-free food
Some standard content:
ICS65.150bzxZ.net
Agricultural Industry Standard of the People's Republic of China
NY/T5165--2002
Pollution-free Food
2002-07-25 Issued
Technical Specifications for Aquaculture of Abalone
2002-09-01 Implementation
Issued by the Ministry of Agriculture of the People's Republic of China
NY/T5165-2002
This standard is proposed by the Ministry of Agriculture of the People's Republic of China. Foreword
This standard is under the jurisdiction of the National Technical Committee for Aquatic Products Standardization. The drafting units of this standard are: Yiyang Fisheries Technology Extension Station of Hunan Province, Hunan Fisheries Science Research Institute, and Fishery Environment and Aquatic Product Quality Supervision and Inspection Center of the Ministry of Agriculture (Wuhan). The main drafters of this standard are: Zhong Xingming, Fu Jianping, Zhang Hanhua, Cai Zhengcai, Liao Fuchu, He Guiwen, Zhang Qiubao, Hu Jianguo, Yin Yong, and Chen Shengping.
1 Scope
Pollution-free food
Technical specification for Chunnaargus breeding
NY/T 5165—2002
This standard specifies the environmental conditions, broodstock cultivation, artificial propagation, seedling cultivation, and edible fish breeding technology for Chunnaargus pollution-free breeding.
This standard applies to pollution-free breeding of Chunnaargus. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB 11607
Fishery water quality standards
GB 13078
Feed hygiene standards
Pollution-free foodWater quality for freshwater aquaculture
NY 5051
Pollution-free foodGuidelines for the use of fishery drugs
NY 5071
Safety limits of compound feeds for fishery
NY5072Pollution-free food
SC/T1006General technical requirements for freshwater cage fish farmingSC/T1008-1994Technical specifications for conventional pond breeding of fry and fingerlingsSC/T1016 (all parts)Technical specifications for pond fish farming in China3 Environmental conditions
3.1 Water source
The water source shall be sufficient, the water quality shall be fresh, the irrigation and drainage shall be convenient, the inlet and outlet water shall be separated, and there shall be no pollution sources that threaten the aquaculture water. 3.2 Water quality
Should comply with the requirements of GB11607 and NY5051, with the water body having an appropriate transparency of 30cm-50cm, a pH value of 7.0-8.5, and a dissolved oxygen content of ≥3mg/l.
3.3 Pond
See Table 1 for pond conditions.
Table 1 Pond conditions
Pond type
Broodstock pond
Bacteria pond
Edible fish
Fish breeding pond
Rectangular
Rectangular
Rectangular
North-South direction
Area/m2
300700
333-1000
Pond depth/m
2. 0~~ 2, 5
Note: The pond conditions for raising black carp shall comply with the provisions of SC/T1016 (all parts) Water depth/m
1. 0~1, 5
Silt thickness/crm
About 20
About 20
NY/T 5165---2002
4 Broodstock breeding
4.1 Broodstock selection
4.1.1 Broodstock source
Select wild broodstock that are healthy and free of injury and disease, caught from rivers, lakes and ditches. 4.1.2 Morphological characteristics
The body is elongated and slightly rod-shaped or rounded, with a nearly round front and a relatively flat back. The back, back of the head and sides of the body are gray-black, the abdomen is gray-white, and there are irregular stripes on the sides of the body.
4.1.3 Reproduction age and body weight
The breeding age is 2 winter-old and the weight is more than 1kg. 4.2 Broodstock stocking
4.2.1 Preparation before stocking
4.2.1.1 Pond cleaning and disinfection
Perform in accordance with SC/T1008.
4.2.1.2 Transplanting water plants
Plant water plants such as wind hyacinth in the pond, and the area of water plants should be 20% to 25% of the pond water area, for the broodstock to hide and live. 4.2.1.3 Feeding fish
The release specifications are 5cm to 10cm live small crucian carp, carp and small fish, which should be healthy and lively, free of disease and injury, and soaked in 3% to 5% salt water for 5min to 10min for disinfection. The release amount is 450kg/hm2 to 750kg/hm2. 4.2.2 Stocking method
It is advisable to stock the pond after 10d to 15d of disinfection in September or the end of March and the beginning of April. Before the broodstock are put into the pond, soak it in 3% to 5% salt water for 5min to 10min for disinfection. The stocking density is 100kg to 150kg per 667m2. The ratio of male to female broodstock is 1:1~1.25. The broodstock shall be raised in separate ponds by sex before the end of April.
4.3 Cultivation and Management
4.3.1 Feeding
4.3.1.1 Feed Requirements
Animal feeds shall be fresh, palatable, free of spoilage and pollution. The protein content of the main nutrient component of compound feed shall not be less than 40%. Its safety and reliability requirements shall comply with the provisions of GB13078 and NY5072. 4.3.1.2 Feeding method
Four fixed feeding methods are adopted:
a) Timing: twice a day, feeding once at 9:00-10:00 a.m. and 4:00-5:00 p.m., b) Positioning: feeding in a fixed feeding table each time; c) Quality determination: according to the provisions of 4.3.1.1, of which animal feed accounts for 70% and compound feed accounts for 30%; d) Quantity: the daily feeding amount is determined as 2%-3% of the parent fish weight from March to April, 6%-8% from May to September, and 1%-3% from October to November, with the morning feeding amount accounting for 30%-35% and the afternoon feeding amount accounting for 65%-70%. Stop feeding 2-3 days before induction of spawning. Live small fish should be fed every 10-15 days, depending on the source of live bait fish, at 350-450 kg/hm2 each time. 4.3.2 Water quality control
From early April to before spawning, add new water and change the water every 10 days, with 10-20 cm of water changed each time. From mid-June to before winter, change the water once a month, with 20-30 cm of water changed each time.
During the breeding period, sprinkle the whole pond with quicklime dissolved in water once every half a month, with the amount of quicklime being 15g/m3-20g/m3. During the wintering period, once a month, the amount of quicklime is 20g/m3-25g/m2 to improve the water quality. 4.3.3 Daily management
Patrol in the morning and evening, observe the feeding, activities, water quality and water level changes of the broodstock, check the inlet and outlet facilities and the pond, take measures when problems are found and 266
, and keep records and establish files. 5 Artificial propagation
5.1 Artificial induced spawning
NY/T 5165---2002
5.1.1 Induced spawning period
The induced spawning period shall be determined according to the development of the broodstock and the water temperature. The suitable water temperature is 22℃28℃. If the broodstock is well developed and the water level rises quickly, induced spawning can be carried out in early May. If the broodstock is generally developed and the water level rises slowly, induced spawning can be carried out in mid-to-late June. 5.1.2 Selection of broodstock for induced spawning
Select broodstock with obviously swollen and soft abdomen, clear egg body, and genital opening that is protruding and expanded into a round shape, and mature eggs can be dug out, and male fish with slightly enlarged and soft abdomen, slightly enlarged, slightly concave, and triangular genital opening for induced spawning. 5.1.3 Oxygen drugs and dosages
Oxygen drugs are used to induce labor.
a) Carp pituitary gland (PG) 5mg/kg~8mg/kg for carp fish, the dosage of male fish is 50%~70% of that of female fish. b) Human chorionic gonadotropin (HCG) 1600IU/kg to 2400IU/kg for male fish, the dosage of male fish is 50% of that of female fish. Mixed induced labor drugs can be used to induce labor in female fish. There are three combinations for inducing labor in female fish: a) Carp pituitary gland (PG) 2mg/kg plus human chorionic gonadotropin (HCG) 1000IU/kg-1600IU/kg b) Luteinizing hormone releasing hormone (1.RH-A) 40μ/kg~90ug/kg (or LRH-A24g/kg-9g/kg) plus human chorionic gonadotropin 200IU/kg400IU/kg
c) Dioxin maleate 3mg/kg~5mg/kg plus human chorionic gonadotropin 800IU/kg~1000IU/kg plus luteinizing hormone releasing hormone 15 μg/kg--20 μg/kg (LRH-Az1.5 μg/kg~2.0 ug/kg). The dosage of male fish is 50% of that of female fish.
Dissolve with physiological saline (0.7%), and the injection dosage per dry gram of broodstock is 1mL2mL. 5.1.4 Spawning
Use natural spawning and fertilization method, put the broodstock injected with oxytocin into the clean spawning equipment (hatching tank, hatching tank, cement hatching pool) at a ratio of 1:1 between female and male, and put 4 to 6 fish per 1m water body. Set up aquatic plants such as wind lotus and early water lotus in the spawning equipment, with an area of 30%-50% of the water area, or set up 3 pieces/m3~5 pieces/m2 of palm leaves as artificial fish nests, and spawn in still water. After spawning, pick up the broodstock and put them into the broodstock breeding pool. 5.2 Fry hatching
5.2.1 Hatching facilities
Use hatching pools or hatching stands, with a water depth of 0.8m~1.0m and a volume of 1.0m~1.5m. Cement pools with a volume of 3m310m can also be used.
5.2.2 Egg laying density
For micro-flow water hatching, 100 eggs/m are laid, and for still water hatching, 1.0×100 eggs/m~1.5×100 eggs/m are laid. 5.2.3 Hatching management
For micro-flow water hatching, 0.5m~1.0m2 of water is replaced per hour to maintain a stable water level; for still water hatching, 30%~50% of water is replaced every day, with water discharged and added at the same time. Remove dead eggs in time, brush the filter screen frequently, prevent the occurrence of sphagnum moss, and prevent sudden changes in water temperature. 5.2.4 Seedling emergence
After 4d~5d after the fry emerge from the membrane, they can spawn when they can swim flexibly. 6 Seedling cultivation
6.1 Summer flower fish fingerling cultivation
6.1.1 Preparation before stocking
According to the provisions of SC/T1008.
NY/T 5165--2002
6.1.2 Stocking of fish fry
Stocking of fish fry from the same batch of hatching in the same pond, the water temperature difference shall not exceed ±2℃, and the stocking density shall be 100 to 150 fry/m2. 6.1.3 Cultivation management
According to the provisions of SC/T1008.
6.2 Cultivation of large-sized fish fingerlings
6.2.1 Preparation before stocking
According to the provisions of SC/T1008.
6.2.2 Stocking of summer fish fingerlings
Stocking density (45×104～75×104) tails/hm2 is appropriate. Summer fish fingerlings are required to be of uniform size, free of disease, injury and deformity, strong and active. One-time stocking and two-level stocking are adopted. When summer fish fingerlings grow to a size of 10cm, they are stocked in separate ponds. 6.2.3 Fertilization
Apply decomposed and fermented green manure or human and livestock manure. According to the water color of the pond, the number of fertilizations and the amount of fertilization should be flexibly controlled. Generally, 750kg～2250kg/hm2 should be applied every 7 days. When applying, remove the debris in the fertilizer and evenly sprinkle it around the fish pond with water. 6.2.4 Feeding
6.2.4.1 Feed types
Animal feed (water fleas, water earthworms, snail and mussel meat, small fish, small shrimps), artificial feed (yeast, corn flour, wheat flour, compound feed). 6.2.4.2 Feed quality
Follow the provisions of 4.3.1.1.
6.2.4.3 Feeding amount
The daily feeding amount is 4%~8% of the weight of the fish in the pond. 6.2.4.4 Feeding time
Feed once at 9:00~10:00 in the morning and once at 4:00~5:00 in the afternoon. 6.2.4.5 Feeding method
Animal feed accounts for 60%, and artificial feed accounts for 40%. In the morning, feed 25%~30% of the daily feeding amount, and in the afternoon, feed 70%~75% of the daily feeding amount. Feed artificial feed first, then animal feed, and the feed is evenly spread around the fish pond. 6.2.4.6 Cultivation management
Follow the provisions of SC/T1008.
7 Edible fish pond breeding
7.1 Conventional fish mixed culture pond breeding
7.1.1 Fish stocking time
Fish stocking is carried out from early May to the end of June. The size of fish is 4cm~13cm, and the most suitable size is 8cm~10cm. The size of fish stocked in the same pond is basically the same. It is appropriate to stock 150~450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
On the basis of the conventional amount of feed, increase the amount of feed by 10%~15% of the weight of the fish in the pond. 7. 1.2.2 Planting of water plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m~0.8m around the pond, and the area of aquatic plants is 15%~~20% of the water area of the pond.
7.1.2.3 Escape prevention
Maintain a distance of 40cm to 50cm between the water surface and the pool surface all year round, and install escape prevention facilities at the inlet and outlet. 7.2 Single pond culture
7.2.1 Preparation before stocking
7.2.1.1 Pond cleaning and disinfection
Perform in accordance with SC/T1008.
7.2.1.2 Planting of aquatic plants
Perform in accordance with 4.2.1.2.
7.2.2 Stocking of fingerlings
7.2.2.1 Fingerling quality
NY/T 5165-2002
Normal size, 16cm to 20cm, strong, brightly colored, with intact scales, agile swimming, and no disease, injury or deformity. 7.2.2.2 Stocking method
Fish fingerlings should be stocked from January to March. Before stocking, fish fingerlings should be soaked in 3% to 5% salt water solution for 5 minutes to 10 minutes for disinfection to kill various pathogens. The stocking density of fish fingerlings should be determined according to the cultivation specifications and production. It is appropriate to stock 30,000 to 75,000 fingerlings per pond. 7.2.3 Feeding management
7.2.3.1 Feed types
Small fish, livestock and poultry slaughter scraps, earthworms, flies and artificial compound feed. 7.2.3.2 Feed quality
Follow the provisions of 4.3.1.1.
7.2.3.3 Feeding amount
Daily feeding amount: 1% to 4% of the weight of fish in the pond from March to April, 5% to 8% from May to September, and 1% to 5% from October to November.
7.2.3.4 Feeding time
Follow the provisions of 6.2.4.4.
7.2.3.5 Feeding method
Animal feed accounts for 60%, compound feed accounts for 40%, or all animal feed can be fed. Feed 30%~35% of the daily feeding amount in the morning, and 65%~70% of the daily feeding amount in the afternoon. Feed compound feed first, then animal feed, and feed is fed in a fixed feeding table. 7.2.3.6 Water quality control
Change the water every 15 days from March to May, and the water change volume is 33% of the pool water. Change the water every 10 days from June to September, and the water change volume is 40% of the pool water. Sprinkle quicklime once every 15 days, and the amount of quicklime used is 10g/m3~15g/m. Adjust the pH value of the pond water to 7.0-8.5, and the pond water color to be oily green (mung bean green). Keep the water quality with sufficient dissolved oxygen and clean and sanitary. 7.2.3.7 Disease prevention and control
Require prevention before disease, early treatment if disease occurs, comprehensive prevention, and active treatment. Thoroughly clean and disinfect the pond, disinfect the fish species, adjust the water quality, operate carefully, and avoid fish injuries. The use of prevention and control drugs shall comply with the provisions of NY5071. 7.2.3.8 Daily management
Patrol the pond once in the morning and evening every day. Observe the changes in pond water color, water level, and fish activities in the early morning, check whether the pond foundation has leakage, and whether the escape prevention facilities are intact. In the afternoon, focus on observing the pond water quality, fish eating conditions, and whether there are any signs of disease. Take appropriate measures in a timely manner according to the specific situation.
8 Cage breeding of edible fish
8.1 Cage requirements
Comply with the provisions of SC/T1006.
8.2 Setting up water plants
Place water hyacinth or water hyacinth in the cage, with the area accounting for 40% to 50% of the cage area. 8.3 Stocking of fish
8.3.1 Quality of fish
Follow the provisions of 7.2.2.1.
NY/T 5165--2002
8.3.2 Stocking method
Stocking of fish should be carried out from January to April. Before the fish enter the cage, soak them in 3% to 5% salt water solution for 5 minutes to 10 minutes for disinfection to kill various pathogens. The operation should be easy to operate and prevent the fish from being injured. The stocking amount should be 10 fish/m2 to 15 fish/m2. 8.3.3 Feeding
Follow the provisions of 7.2.3.1 to 7.2.3.5. 8.3.4 Daily management
Follow the provisions of SC/T1006.
8.3.5 Disease control
Adhere to the principle of prevention first and combination of prevention and control, and the use of prevention and control drugs shall comply with the provisions of NY5071. 2704. Spawning
Use the natural spawning and fertilization method, put the broodstock injected with oxytocin into the clean spawning equipment (hatching tank, hatching tank, cement hatching pool) at a ratio of 1:1, and put 4 to 6 fish per 1m of water. Set up aquatic plants such as wind lotus and early water chestnut in the spawning equipment, with an area of 30% to 50% of the water area, or set up 3 pieces/m3 to 5 pieces/m2 of palm leaves as artificial fish nests, and lay eggs in still water. After spawning, pick up the broodstock and put them into the broodstock breeding pool. 5.2 Fry hatching
5.2.1 Hatching facilities
Use hatching red or hatching pool, with a water depth of 0.8m~1.0m and a volume of 1.0m~1.5m. You can also use a cement pool with a volume of 3m3-10m.
5.2.2 Egg laying density
For micro-flow incubation, 100 eggs/m2 of eggs should be laid, and for still water incubation, 1.0×100 eggs/m2~1.5×100 eggs/m2 of eggs should be laid. 5.2.3 Hatching management
For micro-flow incubation, 0.5m2~1.0m2 of water should be replaced per hour to keep the water level stable; for still water incubation, 30%~50% of water should be replaced every day, with water discharged and added at the same time. Dead eggs should be removed in time, and the filter screen should be brushed frequently to prevent the occurrence of sphagnum moss and sudden changes in water temperature. 5.2.4 Seedling emergence
The fry will emerge after 4~5 days after they emerge from the membrane and can swim flexibly. 6 Seedling cultivation
6.1 Summer flower fish fingerling cultivation
6.1.1 Preparation before stocking fry
According to the provisions of SC/T1008.
NY/T 5165--2002
6.1.2 Stocking of fry
Stocking of fry from the same batch of hatching in the same pond, the water temperature difference shall not exceed ±2℃, and the stocking density shall be 100 to 150 fry/m2.6.1.3 Cultivation and management
According to the provisions of SC/T1008.
6.2 Cultivation of large-sized fish
6.2.1 Preparation before stocking
According to the provisions of SC/T1008.
6.2.2 Stocking of summer flower fish
The stocking density is preferably (45×104～75×104) fry/hm2. Summer flower fish are required to be of uniform size, free of disease, injury and deformity, strong physique and active in swimming. The method is to release the fish once and raise them in two levels. When the summer flower fish grows to a size of 10 cm, they are raised in different ponds. 6.2.3 Fertilization
Apply decomposed and fermented green manure or human and livestock manure. According to the water color of the pond, the number of fertilization and the amount of fertilization should be flexibly controlled. Generally, 750kg~2250kg/hm2 should be applied every 7 days. When applying, remove the debris in the fertilizer and evenly sprinkle it around the fish pond after adding water. 6.2.4 Feeding
6.2.4.1 Feed Types
Animal feed (water fleas, water earthworms, snail and mussel meat, small fish, small shrimps), artificial feed (yeast, corn flour, wheat flour, compound feed). 6.2.4.2 Feed Quality
Follow the provisions of 4.3.1.1.
6.2.4.3 Feeding Amount
The daily feeding amount is 4%~8% of the weight of the fish in the pond. 6.2.4.4 Feeding time
Feed once at 9:00-10:00 a.m. and once at 4:00-5:00 p.m. 6.2.4.5 Feeding method
Animal feed accounts for 60%, artificial feed accounts for 40%, feed 25%-30% of the daily amount in the morning, and 70%-75% of the daily amount in the afternoon. Feed artificial feed first, then animal feed, and spread the feed evenly around the fish pond. 6.2.4.6 Cultivation and management
Follow the provisions of SC/T1008.
7 Edible fish pond breeding
7.1 Conventional fish polyculture pond breeding
7.1.1 Fish stocking time
Fish stocking is carried out from the beginning of May to the end of June. The size of fish species is 4cm to 13cm, and the most suitable size is 8cm to 10cm. The size of fish species in the same pond is basically the same, and it is appropriate to stock 150 to 450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
On the basis of the conventional amount of feed, increase the amount of feed by 10% to 15% of the weight of the fish in the pond. 7. 1.2.2 Planting of aquatic plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m to 0.8m around the pond, and the area of aquatic plants is 15% to 20% of the water area of the pond.
7.1.2.3 Escape prevention
Maintain a distance of 40cm to 50cm between the water surface of the pond all year round, and install escape prevention facilities at the inlet and outlet. 7.2 Single pond culture
7.2.1 Preparation before stocking
7.2.1.1 Pond cleaning and disinfection
Perform according to SC/T1008.
7.2.1.2 Planting of aquatic plants
Perform according to 4.2.1.2.
7.2.2 Stocking of fingerlings
7.2.2.1 Quality of fingerlings
NY/T 5165-2002
Normal specifications, individual length of 16cm~20cm, strong physique, bright color on the body surface, complete scales, agile swimming, free from disease, injury and deformity. 7.2.2.2 Stocking method
Stocking of fingerlings should be carried out from January to March. Before stocking, the fingerlings should be soaked in 3%~5% salt water solution for 5min~~10min for disinfection to kill various pathogens. The stocking density of fish shall be determined according to the grow-out specifications and production, and 30,000 to 75,000 fish shall be stocked per pond. 7.2.3 Feeding management
7.2.3.1 Feed types
Small fish, livestock and poultry slaughter scraps, earthworms, flies and artificial compound feed. 7.2.3.2 Feed quality
Follow the provisions of 4.3.1.1.
7.2.3.3 Feeding amount
Daily feeding amount: 1%~4% of the weight of the fish in the pond from March to April, 5%~8% from May to September, and 1%~5% from October to November.
7.2.3.4 Feeding time
Follow the provisions of 6.2.4.4.
7.2.3.5 Feeding method
Animal feed accounts for 60%, compound feed accounts for 40%, or all animal feed can be fed. Feed 30%~35% of the daily feed in the morning, and 65%~70% of the daily feed in the afternoon. Feed compound feed first, then animal feed, and feed is thrown in a fixed feeding table. 7.2.3.6 Water quality control
Change the water every 15 days from March to May, and the water change volume is 33% of the pool water. Change the water every 10 days from June to September, and the water change volume is 40% of the pool water. Sprinkle quicklime once every 15 days, and the amount of quicklime is 10g/m3~15g/m. Adjust the pH value of the pool water to 7.0~8.5, and the pond water color is oily green (mung bean green). Keep the water quality with sufficient dissolved oxygen and clean and hygienic. 7.2.3.7 Disease prevention and control
Required to prevent diseases before they occur, treat them early, prevent them comprehensively, and treat them actively. Thoroughly clean and disinfect the pond, disinfect the fish species, adjust the water quality, operate carefully, and avoid fish injuries. The use of prevention and control drugs shall comply with the provisions of NY5071. 7.2.3.8 Daily management
Patrol the pond once in the morning and evening every day. In the early morning, observe the changes in the water color and water level of the pond, the activities of the fish, check whether the pond foundation has leakage, and whether the escape prevention facilities are intact. In the afternoon, focus on observing the water quality of the pond, the eating conditions of the fish, and whether there are any signs of disease. Take corresponding measures in time according to the specific situation.
8 Cage breeding of edible fish
8.1 Cage requirements
Comply with the provisions of SC/T1006.
8.2 Set up water plants
Place water hyacinth or water hyacinth in the cage, and the area accounts for 40% to 50% of the cage area. 8.3 Fish stocking
8.3.1 Fish quality
Follow the provisions of 7.2.2.1.
NY/T 5165--2002
8.3.2 Stocking method
Stocking fish should be carried out from January to April. Before the fish enter the box, soak them in 3% to 5% salt water for 5 minutes to 10 minutes for disinfection to kill various pathogens. The operation should be light to prevent the fish from being injured. The stocking amount should be 10 to 15 fish/m2. 8.3.3 Feeding
Follow the provisions of 7.2.3.1 to 7.2.3.5. 8.3.4 Daily management
Follow the provisions of SC/T1006.
8.3.5 Disease control
Adhere to the principle of prevention first and combination of prevention and control. The use of prevention and control drugs shall comply with the provisions of NY5071. 2704. Spawning
Use the natural spawning and fertilization method, put the broodstock injected with oxytocin into the clean spawning equipment (hatching tank, hatching tank, cement hatching pool) at a ratio of 1:1, and put 4 to 6 fish per 1m of water. Set up aquatic plants such as wind lotus and early water chestnut in the spawning equipment, with an area of 30% to 50% of the water area, or set up 3 pieces/m3 to 5 pieces/m2 of palm leaves as artificial fish nests, and lay eggs in still water. After spawning, pick up the broodstock and put them into the broodstock breeding pool. 5.2 Fry hatching
5.2.1 Hatching facilities
Use hatching red or hatching pool, with a water depth of 0.8m~1.0m and a volume of 1.0m~1.5m. You can also use a cement pool with a volume of 3m3-10m.
5.2.2 Egg laying density
For micro-flow incubation, 100 eggs/m2 of eggs should be laid, and for still water incubation, 1.0×100 eggs/m2~1.5×100 eggs/m2 of eggs should be laid. 5.2.3 Hatching management
For micro-flow incubation, 0.5m2~1.0m2 of water should be replaced per hour to keep the water level stable; for still water incubation, 30%~50% of water should be replaced every day, with water discharged and added at the same time. Dead eggs should be removed in time, and the filter screen should be brushed frequently to prevent the occurrence of sphagnum moss and sudden changes in water temperature. 5.2.4 Seedling emergence
The fry will emerge after 4~5 days after they emerge from the membrane and can swim flexibly. 6 Seedling cultivation
6.1 Summer flower fish fingerling cultivation
6.1.1 Preparation before stocking fry
According to the provisions of SC/T1008.
NY/T 5165--2002
6.1.2 Stocking of fry
Stocking of fry from the same batch of hatching in the same pond, the water temperature difference shall not exceed ±2℃, and the stocking density shall be 100 to 150 fry/m2.6.1.3 Cultivation and management
According to the provisions of SC/T1008.
6.2 Cultivation of large-sized fish
6.2.1 Preparation before stocking
According to the provisions of SC/T1008.
6.2.2 Stocking of summer flower fish
The stocking density is preferably (45×104～75×104) fry/hm2. Summer flower fish are required to be of uniform size, free of disease, injury and deformity, strong physique and active in swimming. The method is to release the fish once and raise them in two levels. When the summer flower fish grows to a size of 10 cm, they are raised in different ponds. 6.2.3 Fertilization
Apply decomposed and fermented green manure or human and livestock manure. According to the water color of the pond, the number of fertilization and the amount of fertilization should be flexibly controlled. Generally, 750kg~2250kg/hm2 should be applied every 7 days. When applying, remove the debris in the fertilizer and evenly sprinkle it around the fish pond after adding water. 6.2.4 Feeding
6.2.4.1 Feed Types
Animal feed (water fleas, water earthworms, snail and mussel meat, small fish, small shrimps), artificial feed (yeast, corn flour, wheat flour, compound feed). 6.2.4.2 Feed Quality
Follow the provisions of 4.3.1.1.
6.2.4.3 Feeding Amount
The daily feeding amount is 4%~8% of the weight of the fish in the pond. 6.2.4.4 Feeding time
Feed once at 9:00-10:00 a.m. and once at 4:00-5:00 p.m. 6.2.4.5 Feeding method
Animal feed accounts for 60%, artificial feed accounts for 40%, feed 25%-30% of the daily amount in the morning, and 70%-75% of the daily amount in the afternoon. Feed artificial feed first, then animal feed, and spread the feed evenly around the fish pond. 6.2.4.6 Cultivation and management
Follow the provisions of SC/T1008.
7 Edible fish pond breeding
7.1 Conventional fish polyculture pond breeding
7.1.1 Fish stocking time
Fish stocking is carried out from the beginning of May to the end of June. The size of fish species is 4cm to 13cm, and the most suitable size is 8cm to 10cm. The size of fish species in the same pond is basically the same, and it is appropriate to stock 150 to 450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
On the basis of the conventional amount of feed, increase the amount of feed by 10% to 15% of the weight of the fish in the pond. 7. 1.2.2 Planting of aquatic plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m to 0.8m around the pond, and the area of aquatic plants is 15% to 20% of the water area of the pond.
7.1.2.3 Escape prevention
Maintain a distance of 40cm to 50cm between the water surface of the pond all year round, and install escape prevention facilities at the inlet and outlet. 7.2 Single pond culture
7.2.1 Preparation before stocking
7.2.1.1 Pond cleaning and disinfection
Perform according to SC/T1008.
7.2.1.2 Planting of aquatic plants
Perform according to 4.2.1.2.
7.2.2 Stocking of fingerlings
7.2.2.1 Quality of fingerlings
NY/T 5165-2002
Normal specifications, individual length of 16cm~20cm, strong physique, bright color on the body surface, complete scales, agile swimming, free from disease, injury and deformity. 7.2.2.2 Stocking method
Stocking of fingerlings should be carried out from January to March. Before stocking, the fingerlings should be soaked in 3%~5% salt water solution for 5min~~10min for disinfection to kill various pathogens. The stocking density of fish shall be determined according to the grow-out specifications and production, and 30,000 to 75,000 fish shall be stocked per pond. 7.2.3 Feeding management
7.2.3.1 Feed types
Small fish, livestock and poultry slaughter scraps, earthworms, flies and artificial compound feed. 7.2.3.2 Feed quality
Follow the provisions of 4.3.1.1.
7.2.3.3 Feeding amount
Daily feeding amount: 1%~4% of the weight of the fish in the pond from March to April, 5%~8% from May to September, and 1%~5% from October to November.
7.2.3.4 Feeding time
Follow the provisions of 6.2.4.4.
7.2.3.5 Feeding method
Animal feed accounts for 60%, compound feed accounts for 40%, or all animal feed can be fed. Feed 30%~35% of the daily feed in the morning, and 65%~70% of the daily feed in the afternoon. Feed compound feed first, then animal feed, and feed is thrown in a fixed feeding table. 7.2.3.6 Water quality control
Change the water every 15 days from March to May, and the water change volume is 33% of the pool water. Change the water every 10 days from June to September, and the water change volume is 40% of the pool water. Sprinkle quicklime once every 15 days, and the amount of quicklime is 10g/m3~15g/m. Adjust the pH value of the pool water to 7.0~8.5, and the pond water color is oily green (mung bean green). Keep the water quality with sufficient dissolved oxygen and clean and hygienic. 7.2.3.7 Disease prevention and control
Required to prevent diseases before they occur, treat them early, prevent them comprehensively, and treat them actively. Thoroughly clean and disinfect the pond, disinfect the fish species, adjust the water quality, operate carefully, and avoid fish injuries. The use of prevention and control drugs shall comply with the provisions of NY5071. 7.2.3.8 Daily management
Patrol the pond once in the morning and evening every day. In the early morning, observe the changes in the water color and water level of the pond, the activities of the fish, check whether the pond foundation has leakage, and whether the escape prevention facilities are intact. In the afternoon, focus on observing the water quality of the pond, the eating conditions of the fish, and whether there are any signs of disease. Take corresponding measures in time according to the specific situation.
8 Cage breeding of edible fish
8.1 Cage requirements
Comply with the provisions of SC/T1006.
8.2 Set up water plants
Place water hyacinth or water hyacinth in the cage, and the area accounts for 40% to 50% of the cage area. 8.3 Fish stocking
8.3.1 Fish quality
Follow the provisions of 7.2.2.1.
NY/T 5165--2002
8.3.2 Stocking method
Stocking fish should be carried out from January to April. Before the fish enter the box, soak them in 3% to 5% salt water for 5 minutes to 10 minutes for disinfection to kill various pathogens. The operation should be light to prevent the fish from being injured. The stocking amount should be 10 to 15 fish/m2. 8.3.3 Feeding
Follow the provisions of 7.2.3.1 to 7.2.3.5. 8.3.4 Daily management
Follow the provisions of SC/T1006.
8.3.5 Disease control
Adhere to the principle of prevention first and combination of prevention and control. The use of prevention and control drugs shall comply with the provisions of NY5071. 2705 Disease control
Adhere to the principle of prevention first and combination of prevention and control, and the use of prevention and control drugs shall comply with the provisions of NY5071. 2705 Disease control
Adhere to the principle of prevention first and combination of prevention and control, and the use of prevention and control drugs shall comply with the provisions of NY5071. 2705m, or a cement pool with a volume of 3m310m.
5.2.2 Egg-laying density
For micro-flow water incubation, 10 ...
NY/T 5165--2002
6.1.2 Stocking of fry
Stocking of fry from the same batch of hatching in the same pond, the water temperature difference shall not exceed ±2℃, and the stocking density shall be 100 to 150 fry/m2.6.1.3 Cultivation and management
According to the provisions of SC/T1008.
6.2 Cultivation of large-sized fish
6.2.1 Preparation before stocking
According to the provisions of SC/T1008.
6.2.2 Stocking of summer flower fish
The stocking density is preferably (45×104～75×104) fry/hm2. Summer flower fish are required to be of uniform size, free of disease, injury and deformity, strong physique and active in swimming. The method is to release the fish once and raise them in two levels. When the summer flower fish grows to a size of 10 cm, they are raised in different ponds. 6.2.3 Fertilization
Apply decomposed and fermented green manure or human and livestock manure. According to the water color of the pond, the number of fertilization and the amount of fertilization should be flexibly controlled. Generally, 750kg~2250kg/hm2 should be applied every 7 days. When applying, remove the debris in the fertilizer and evenly sprinkle it around the fish pond after adding water. 6.2.4 Feeding
6.2.4.1 Feed Types
Animal feed (water fleas, water earthworms, snail and mussel meat, small fish, small shrimps), artificial feed (yeast, corn flour, wheat flour, compound feed). 6.2.4.2 Feed Quality
Follow the provisions of 4.3.1.1.
6.2.4.3 Feeding Amount
The daily feeding amount is 4%~8% of the weight of the fish in the pond. 6.2.4.4 Feeding time
Feed once at 9:00-10:00 a.m. and once at 4:00-5:00 p.m. 6.2.4.5 Feeding method
Animal feed accounts for 60%, artificial feed accounts for 40%, feed 25%-30% of the daily amount in the morning, and 70%-75% of the daily amount in the afternoon. Feed artificial feed first, then animal feed, and spread the feed evenly around the fish pond. 6.2.4.6 Cultivation and management
Follow the provisions of SC/T1008.
7 Edible fish pond breeding
7.1 Conventional fish polyculture pond breeding
7.1.1 Fish stocking time
Fish stocking is carried out from the beginning of May to the end of June. The size of fish species is 4cm to 13cm, and the most suitable size is 8cm to 10cm. The size of fish species in the same pond is basically the same, and it is appropriate to stock 150 to 450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
On the basis of the conventional amount of feed, increase the amount of feed by 10% to 15% of the weight of the fish in the pond. 7. 1.2.2 Planting of aquatic plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m to 0.8m around the pond, and the area of aquatic plants is 15% to 20% of the water area of the pond.
7.1.2.3 Escape prevention
Maintain a distance of 40cm to 50cm between the water surface of the pond all year round, and install escape prevention facilities at the inlet and outlet. 7.2 Single pond culture
7.2.1 Preparation before stocking
7.2.1.1 Pond cleaning and disinfection
Perform according to SC/T1008.
7.2.1.2 Planting of aquatic plants
Perform according to 4.2.1.2.
7.2.2 Stocking of fingerlings
7.2.2.1 Quality of fingerlings
NY/T 5165-2002
Normal specifications, individual length of 16cm~20cm, strong physique, bright color on the body surface, complete scales, agile swimming, free from disease, injury and deformity. 7.2.2.2 Stocking method
Stocking of fingerlings should be carried out from January to March. Before stocking, the fingerlings should be soaked in 3%~5% salt water solution for 5min~~10min for disinfection to kill various pathogens. The stocking density of fish shall be determined according to the grow-out specifications and production, and 30,000 to 75,000 fish shall be stocked per pond. 7.2.3 Feeding management
7.2.3.1 Feed types
Small fish, livestock and poultry slaughter scraps, earthworms, flies and artificial compound feed. 7.2.3.2 Feed quality
Follow the provisions of 4.3.1.1.
7.2.3.3 Feeding amount
Daily feeding amount: 1%~4% of the weight of the fish in the pond from March to April, 5%~8% from May to September, and 1%~5% from October to November.
7.2.3.4 Feeding time
Follow the provisions of 6.2.4.4.
7.2.3.5 Feeding method
Animal feed accounts for 60%, compound feed accounts for 40%, or all animal feed can be fed. Feed 30%~35% of the daily feed in the morning, and 65%~70% of the daily feed in the afternoon. Feed compound feed first, then animal feed, and feed is thrown in a fixed feeding table. 7.2.3.6 Water quality control
Change the water every 15 days from March to May, and the water change volume is 33% of the pool water. Change the water every 10 days from June to September, and the water change volume is 40% of the pool water. Sprinkle quicklime once every 15 days, and the amount of quicklime is 10g/m3~15g/m. Adjust the pH value of the pool water to 7.0~8.5, and the pond water color is oily green (mung bean green). Keep the water quality with sufficient dissolved oxygen and clean and hygienic. 7.2.3.7 Disease prevention and control
Required to prevent diseases before they occur, treat them early, prevent them comprehensively, and treat them actively. Thoroughly clean and disinfect the pond, disinfect the fish species, adjust the water quality, operate carefully, and avoid fish injuries. The use of prevention and control drugs shall comply with the provisions of NY5071. 7.2.3.8 Daily management
Patrol the pond once in the morning and evening every day. In the early morning, observe the changes in the water color and water level of the pond, the activities of the fish, check whether the pond foundation has leakage, and whether the escape prevention facilities are intact. In the afternoon, focus on observing the water quality of the pond, the eating conditions of the fish, and whether there are any signs of disease. Take corresponding measures in time according to the specific situation.
8 Cage breeding of edible fish
8.1 Cage requirements
Comply with the provisions of SC/T1006.
8.2 Set up water plants
Place water hyacinth or water hyacinth in the cage, and the area accounts for 40% to 50% of the cage area. 8.3 Fish stocking
8.3.1 Fish quality
Follow the provisions of 7.2.2.1.
NY/T 5165--2002
8.3.2 Stocking method
Stocking fish should be carried out from January to April. Before the fish enter the box, soak them in 3% to 5% salt water for 5 minutes to 10 minutes for disinfection to kill various pathogens. The operation should be light to prevent the fish from being injured. The stocking amount should be 10 to 15 fish/m2. 8.3.3 Feeding
Follow the provisions of 7.2.3.1 to 7.2.3.5. 8.3.4 Daily management
Follow the provisions of SC/T1006.
8.3.5 Disease control
Adhere to the principle of prevention first and combination of prevention and control. The use of prevention and control drugs shall comply with the provisions of NY5071. 2705m, or a cement pool with a volume of 3m310m.
5.2.2 Egg-laying density
For micro-flow water incubation, 10 ...
NY/T 5165--2002
6.1.2 Stocking of fry
Stocking of fry from the same batch of hatching in the same pond, the water temperature difference shall not exceed ±2℃, and the stocking density shall be 100 to 150 fry/m2.6.1.3 Cultivation and management
According to the provisions of SC/T1008.
6.2 Cultivation of large-sized fish
6.2.1 Preparation before stocking
According to the provisions of SC/T1008.
6.2.2 Stocking of summer flower fish
The stocking density is preferably (45×104～75×104) fry/hm2. Summer flower fish are required to be of uniform size, free of disease, injury and deformity, strong physique and active in swimming. The method is to release the fish once and raise them in two levels. When the summer flower fish grows to a size of 10 cm, they are raised in different ponds. 6.2.3 Fertilization
Apply decomposed and fermented green manure or human and livestock manure. According to the water color of the pond, the number of fertilization and the amount of fertilization should be flexibly controlled. Generally, 750kg~2250kg/hm2 should be applied every 7 days. When applying, remove the debris in the fertilizer and evenly sprinkle it around the fish pond after adding water. 6.2.4 Feeding
6.2.4.1 Feed Types
Animal feed (water fleas, water earthworms, snail and mussel meat, small fish, small shrimps), artificial feed (yeast, corn flour, wheat flour, compound feed). 6.2.4.2 Feed Quality
Follow the provisions of 4.3.1.1.
6.2.4.3 Feeding Amount
The daily feeding amount is 4%~8% of the weight of the fish in the pond. 6.2.4.4 Feeding time
Feed once at 9:00-10:00 a.m. and once at 4:00-5:00 p.m. 6.2.4.5 Feeding method
Animal feed accounts for 60%, artificial feed accounts for 40%, feed 25%-30% of the daily amount in the morning, and 70%-75% of the daily amount in the afternoon. Feed artificial feed first, then animal feed, and spread the feed evenly around the fish pond. 6.2.4.6 Cultivation and management
Follow the provisions of SC/T1008.
7 Edible fish pond breeding
7.1 Conventional fish polyculture pond breeding
7.1.1 Fish stocking time
Fish stocking is carried out from the beginning of May to the end of June. The size of fish species is 4cm to 13cm, and the most suitable size is 8cm to 10cm. The size of fish species in the same pond is basically the same, and it is appropriate to stock 150 to 450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
On the basis of the conventional amount of feed, increase the amount of feed by 10% to 15% of the weight of the fish in the pond. 7. 1.2.2 Planting of aquatic plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m to 0.8m around the pond, and the area of aquatic plants is 15% to 20% of the water area of the pond.
7.1.2.3 Escape prevention
Maintain a distance of 40cm to 50cm between the water surface of the pond all year round, and install escape prevention facilities at the inlet and outlet. 7.2 Single pond culture
7.2.1 Preparation before stocking
7.2.1.1 Pond cleaning and disinfection
Perform according to SC/T1008.
7.2.1.2 Planting of aquatic plants
Perform according to 4.2.1.2.
7.2.2 Stocking of fingerlings
7.2.2.1 Quality of fingerlings
NY/T 5165-2002
Normal specifications, individual length of 16cm~20cm, strong physique, bright color on the body surface, complete scales, agile swimming, free from disease, injury and deformity. 7.2.2.2 Stocking method
Stocking of fingerlings should be carried out from January to March. Before stocking, the fingerlings should be soaked in 3%~5% salt water solution for 5min~~10min for disinfection to kill various pathogens. The stocking density of fish shall be determined according to the grow-out specifications and production, and 30,000 to 75,000 fish shall be stocked per pond. 7.2.3 Feeding management
7.2.3.1 Feed types
Small fish, livestock and poultry slaughter scraps, earthworms, flies and artificial compound feed. 7.2.3.2 Feed quality
Follow the provisions of 4.3.1.1.
7.2.3.3 Feeding amount
Daily feeding amount: 1%~4% of the weight of the fish in the pond from March to April, 5%~8% from May to September, and 1%~5% from October to November.
7.2.3.4 Feeding time
Follow the provisions of 6.2.4.4.
7.2.3.5 Feeding method
Animal feed accounts for 60%, compound feed accounts for 40%, or all animal feed can be fed. Feed 30%~35% of the daily feed in the morning, and 65%~70% of the daily feed in the afternoon. Feed compound feed first, then animal feed, and feed is thrown in a fixed feeding table. 7.2.3.6 Water quality control
Change the water every 15 days from March to May, and the water change volume is 33% of the pool water. Change the water every 10 days from June to September, and the water change volume is 40% of the pool water. Sprinkle quicklime once every 15 days, and the amount of quicklime is 10g/m3~15g/m. Adjust the pH value of the pool water to 7.0~8.5, and the pond water color is oily green (mung bean green). Keep the water quality with sufficient dissolved oxygen and clean and hygienic. 7.2.3.7 Disease prevention and control
Required to prevent diseases before they occur, treat them early, prevent them comprehensively, and treat them actively. Thoroughly clean and disinfect the pond, disinfect the fish species, adjust the water quality, operate carefully, and avoid fish injuries. The use of prevention and control drugs shall comply with the provisions of NY5071. 7.2.3.8 Daily management
Patrol the pond once in the morning and evening every day. In the early morning, observe the changes in the water color and water level of the pond, the activities of the fish, check whether the pond foundation has leakage, and whether the escape prevention facilities are intact. In the afternoon, focus on observing the water quality of the pond, the eating conditions of the fish, and whether there are any signs of disease. Take corresponding measures in time according to the specific situation.
8 Cage breeding of edible fish
8.1 Cage requirements
Comply with the provisions of SC/T1006.
8.2 Set up water plants
Place water hyacinth or water hyacinth in the cage, and the area accounts for 40% to 50% of the cage area. 8.3 Fish stocking
8.3.1 Fish quality
Follow the provisions of 7.2.2.1.
NY/T 5165--2002
8.3.2 Stocking method
Stocking fish should be carried out from January to April. Before the fish enter the box, soak them in 3% to 5% salt water for 5 minutes to 10 minutes for disinfection to kill various pathogens. The operation should be light to prevent the fish from being injured. The stocking amount should be 10 to 15 fish/m2. 8.3.3 Feeding
Follow the provisions of 7.2.3.1 to 7.2.3.5. 8.3.4 Daily management
Follow the provisions of SC/T1006.
8.3.5 Disease control
Adhere to the principle of prevention first and combination of prevention and control. The use of prevention and control drugs shall comply with the provisions of NY5071. 2703 Breeding and management
Follow the provisions of SC/T1008.
6.2 Breeding of large-sized fish
6.2.1 Preparation before stocking
Follow the provisions of SC/T1008.
6.2.2 Stocking of summer flower fish
Stocking density (45×104～75×104) tails/hm2 is appropriate. Summer flower fish are required to be of uniform size, free of disease, injury and deformity, strong physique and active swimming. One-time stocking and two-level breeding are adopted. When the summer flower fish grow to a size of 10cm, they are raised in separate ponds. 6.2.3 Fertilization
Apply green manure or human and livestock manure after decomposition and fermentation. According to the water color of the pond, flexibly control the frequency and amount of fertilization. Generally, 750kg~2250kg/hm2 is applied every 7 days. When applying, remove the debris in the fertilizer and evenly sprinkle it around the fish pond with water. 6.2.4 Feeding
6.2.4.1 Feed types
Animal feed (water fleas, water worms, snails and mussels, small fish, small shrimps), artificial feed (yeast, corn flour, wheat flour, compound feed). 6.2.4.2 Feed quality
Follow the provisions of 4.3.1.1.
6.2.4.3 Feeding amount
The daily feeding amount is 4%~8% of the weight of the fish in the pond. 6.2.4.4 Feeding time
Feed once at 9:00~10:00 in the morning and 4:00~5:00 in the afternoon. 6.2.4.5 Feeding method
Animal feed accounts for 60%, artificial feed accounts for 40%, feed 25%~30% of the daily feed in the morning, feed 70%~75% of the daily feed in the afternoon, feed artificial feed first, then animal feed, and feed is evenly spread around the fish pond. 6.2.4.6 Cultivation management
Follow the provisions of SC/T1008.
7 Edible fish pond breeding
7.1 Conventional fish mixed culture pond breeding
7.1.1 Fish stocking time
Fish stocking is carried out from early May to the end of June. The size of fish is 4cm~13cm, and the most suitable size is 8cm~10cm. The size of fish stocked in the same pond is basically the same, and it is appropriate to stock 150~450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
Add 10% to 15% of the weight of the fish in the pond on the basis of the normal amount of feed. 7.1.2.2 Planting aquatic plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m to 0.8m around the pond, and the area of aquatic plants is 15% to 20% of the water area of the pond.
7.1.2.3 Escape prevention
Maintain a distance of 40cm to 50cm between the water surface of the pond all year round, and install escape prevention facilities at the inlet and outlet. 7.2 Single pond culture
7.2.1 Preparation before stocking
7.2.1.1 Pond cleaning and disinfection
Perform in accordance with SC/T1008.
7.2.1.2 Planting of aquatic plants
Follow the provisions of 4.2.1.2.
7.2.2 Stocking of fish
7.2.2.1 Quality of fish
NY/T 5165-2002
Normal specifications, 16cm~20cm in size, strong physique, bright color on the body surface, complete scales, agile swimming, free from disease, injury and deformity. 7.2.2.2 Stocking method
Stocking of fish should be carried out from January to March. Before stocking, the fish should be soaked in 3%~5% salt water solution for 5min~~10min for disinfection to kill various pathogens. The stocking density of fish should be determined according to the growth specifications and production. It is appropriate to stock 30,000~75,000 fish per pond. 7.2.3 Feeding Management
7.2.3.1 Feed Types
Small fish, livestock and poultry slaughter scraps, earthworms, flies and artificial compound feed. 7.2.3.2 Feed Quality
Follow the provisions of 4.3.1.1.
7.2.3.3 Feeding Amount
Daily Feeding Amount: 1%~~4% of the weight of the fish in the pond from March to April, 5%~8% from May to September, and 1%~5% from October to November.
7.2.3.4 Feeding Time
Follow the provisions of 6.2.4.4.
7.2.3.5 Feeding Method
Animal feed accounts for 60%, compound feed accounts for 40%, or all animal feed can be fed. Feed 30%~35% of the daily feed amount in the morning, and 65%~70% of the daily feed amount in the afternoon. Feed compound feed first, then animal feed, and feed should be placed in a fixed feeding table. 7.2.3.6 Water quality control
Change the water every 15 days from March to May, and the water change amount is 33% of the pool water. Change the water every 10 days from June to September, and the water change amount is 40% of the pool water. Sprinkle quicklime once every 15 days, and the amount of quicklime is 10g/m3~15g/m. Adjust the pH value of the pool water to 7.0~8.5, and the pond water color is oily green (mung bean green). Keep the water quality with sufficient dissolved oxygen and clean and hygienic. 7.2.3.7 Disease prevention
Require prevention before disease, early treatment if disease occurs, comprehensive prevention, and active treatment. Thoroughly clean and disinfect the pond, disinfect the fish species, adjust the water quality, and operate carefully to avoid fish injuries. The use of control drugs shall comply with the provisions of NY5071. 7.2.3.8 Daily management
Patrol the pond once in the morning and evening every day. In the morning, observe the changes in the water color and water level of the pond, the activities of the fish, check whether the pond foundation has leakage, and whether the escape prevention facilities are intact. In the afternoon, focus on observing the water quality of the pond, the eating conditions of the fish, and whether there are any signs of disease. Take appropriate measures in a timely manner according to the specific situation.
8 Cage breeding of edible fish
8.1 Cage requirements
Comply with the provisions of SC/T1006.
8.2 Setting up water plants
Place water hyacinth or water hyacinth in the cage, and the area accounts for 40% to 50% of the cage area. 8.3 Stocking of fish
8.3.1 Fish quality
Comply with the provisions of 7.2.2.1.
NY/T 5165--2002
8.3.2 Stocking method
Stocking of fingerlings should be carried out from January to April. Before entering the box, the fingerlings should be soaked in 3% to 5% salt water for 5 minutes to 10 minutes for disinfection to kill various pathogens. The operation should be light to prevent the fish from being injured. The stocking quantity should be 10 to 15 per m2. 8.3.3 Feeding
Refer to the provisions of 7.2.3.1 to 7.2.3.5. 8.3.4 Daily management
Follow the provisions of SC/T1006.
8.3.5 Disease control
Adhere to the principle of prevention first and combination of prevention and control. The use of prevention and control drugs shall comply with the provisions of NY5071. 2703 Breeding and management
Follow the provisions of SC/T1008.
6.2 Breeding of large-sized fish
6.2.1 Preparation before stocking
Follow the provisions of SC/T1008.
6.2.2 Stocking of summer flower fish
Stocking density (45×104～75×104) tails/hm2 is appropriate. Summer flower fish are required to be of uniform size, free of disease, injury and deformity, strong physique and active swimming. One-time stocking and two-level breeding are adopted. When the summer flower fish grow to a size of 10cm, they are raised in separate ponds. 6.2.3 Fertilization
Apply green manure or human and livestock manure after decomposition and fermentation. According to the water color of the pond, flexibly control the frequency and amount of fertilization. Generally, 750kg~2250kg/hm2 is applied every 7 days. When applying, remove the debris in the fertilizer and evenly sprinkle it around the fish pond with water. 6.2.4 Feeding
6.2.4.1 Feed types
Animal feed (water fleas, water worms, snails and mussels, small fish, small shrimps), artificial feed (yeast, corn flour, wheat flour, compound feed). 6.2.4.2 Feed quality
Follow the provisions of 4.3.1.1.
6.2.4.3 Feeding amount
The daily feeding amount is 4%~8% of the weight of the fish in the pond. 6.2.4.4 Feeding time
Feed once at 9:00~10:00 in the morning and 4:00~5:00 in the afternoon. 6.2.4.5 Feeding method
Animal feed accounts for 60%, artificial feed accounts for 40%, feed 25%~30% of the daily feed in the morning, feed 70%~75% of the daily feed in the afternoon, feed artificial feed first, then animal feed, and feed is evenly spread around the fish pond. 6.2.4.6 Cultivation management
Follow the provisions of SC/T1008.
7 Edible fish pond breeding
7.1 Conventional fish mixed culture pond breeding
7.1.1 Fish stocking time
Fish stocking is carried out from early May to the end of June. The size of fish is 4cm~13cm, and the most suitable size is 8cm~10cm. The size of fish stocked in the same pond is basically the same, and it is appropriate to stock 150~450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
Add 10% to 15% of the weight of the fish in the pond on the basis of the normal amount of feed. 7.1.2.2 Planting aquatic plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m to 0.8m around the pond, and the area of aquatic plants is 15% to 20% of the water area of the pond.
7.1.2.3 Escape prevention
Maintain a distance of 40cm to 50cm between the water surface of the pond all year round, and install escape prevention facilities at the inlet and outlet. 7.2 Single pond culture
7.2.1 Preparation before stocking
7.2.1.1 Pond cleaning and disinfection
Perform in accordance with SC/T1008.
7.2.1.2 Planting of aquatic plants
Follow the provisions of 4.2.1.2.
7.2.2 Stocking of fish
7.2.2.1 Quality of fish
NY/T 5165-2002
Normal specifications, 16cm~20cm in size, strong physique, bright color on the body surface, complete scales, agile swimming, free from disease, injury and deformity. 7.2.2.2 Stocking method
Stocking of fish should be carried out from January to March. Before stocking, the fish should be soaked in 3%~5% salt water solution for 5min~~10min for disinfection to kill various pathogens. The stocking density of fish should be determined according to the growth specifications and production. It is appropriate to stock 30,000~75,000 fish per pond. 7.2.3 Feeding Management
7.2.3.1 Feed Types
Small fish, livestock and poultry slaughter scraps, earthworms, flies and artificial compound feed. 7.2.3.2 Feed Quality
Follow the provisions of 4.3.1.1.
7.2.3.3 Feeding Amount
Daily Feeding Amount: 1%~~4% of the weight of the fish in the pond from March to April, 5%~8% from May to September, and 1%~5% from October to November.
7.2.3.4 Feeding Time
Follow the provisions of 6.2.4.4.
7.2.3.5 Feeding Method
Animal feed accounts for 60%, compound feed accounts for 40%, or all animal feed can be fed. Feed 30%~35% of the daily feed amount in the morning, and 65%~70% of the daily feed amount in the afternoon. Feed compound feed first, then animal feed, and feed should be placed in a fixed feeding table. 7.2.3.6 Water quality control
Change the water every 15 days from March to May, and the water change amount is 33% of the pool water. Change the water every 10 days from June to September, and the water change amount is 40% of the pool water. Sprinkle quicklime once every 15 days, and the amount of quicklime is 10g/m3~15g/m. Adjust the pH value of the pool water to 7.0~8.5, and the pond water color is oily green (mung bean green). Keep the water quality with sufficient dissolved oxygen and clean and hygienic. 7.2.3.7 Disease prevention
Require prevention before disease, early treatment if disease occurs, comprehensive prevention, and active treatment. Thoroughly clean and disinfect the pond, disinfect the fish species, adjust the water quality, and operate carefully to avoid fish injuries. The use of control drugs shall comply with the provisions of NY5071. 7.2.3.8 Daily management
Patrol the pond once in the morning and evening every day. In the morning, observe the changes in the water color and water level of the pond, the activities of the fish, check whether the pond foundation has leakage, and whether the escape prevention facilities are intact. In the afternoon, focus on observing the water quality of the pond, the eating conditions of the fish, and whether there are any signs of disease. Take appropriate measures in a timely manner according to the specific situation.
8 Cage breeding of edible fish
8.1 Cage requirements
Comply with the provisions of SC/T1006.
8.2 Setting up water plants
Place water hyacinth or water hyacinth in the cage, and the area accounts for 40% to 50% of the cage area. 8.3 Stocking of fish
8.3.1 Fish quality
Comply with the provisions of 7.2.2.1.
NY/T 5165--2002
8.3.2 Stocking method
Stocking of fingerlings should be carried out from January to April. Before entering the box, the fingerlings should be soaked in 3% to 5% salt water for 5 minutes to 10 minutes for disinfection to kill various pathogens. The operation should be light to prevent the fish from being injured. The stocking quantity should be 10 to 15 per m2. 8.3.3 Feeding
Refer to the provisions of 7.2.3.1 to 7.2.3.5. 8.3.4 Daily management
Follow the provisions of SC/T1006.
8.3.5 Disease control
Adhere to the principle of prevention first and combination of prevention and control. The use of prevention and control drugs shall comply with the provisions of NY5071. 2701. Fish stocking time
Fish stocking is carried out from early May to the end of June. The size of fish is 4cm~13cm, and the most suitable size is 8cm~10cm. The size of fish stocked in the same pond is basically the same. It is appropriate to stock 150~450 fish per pond. 7.1.2 Feeding management
7.1.2.1 Increase the amount of feed
On the basis of the conventional amount of feed, increase the amount of feed by 10%~15% of the weight of the fish in the pond. 7. 1.2.2 Planting of aquatic plants
Plant aquatic plants (such as water hyacinth) with a width of 0.6m~0.8m around the pond, and the area of aquatic plants is 15%~~20% of the area of the pond water body.
7.1.2.3 Escape prevention
Maintain a distance of 40cm~50cm between the water surface of the pond all year round, and install escape p
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