GB/T 2930.8-2001 Inspection procedures for forage seeds - Determination of moisture content
Some standard content:
ICs._65. 020-20
National Standard of the People's Republic of China
GB/T 2930.1~~2930.112001
Procedure for Inspection of Forage Seeds
Kules for Forage Seed tesling20010314 Issued
2001-0601 Implementation
State Administration of Quality and Technical Supervision Issued
GB/T 2930.8- 2001
This standard is formulated based on the International Seed Testing Association (ISTA) GH2930-1982 seed testing procedures.
In terms of major technical contents such as the testing methods of fine grains, this standard equivalently adopts Part VII of the international standard (ISTA, 1999) for moisture determination. In addition, it incorporates the international standard and provides 29 species and materials that have economic value and suitable testing methods in my country, so that the standard not only has the advancedness and scientificity of international standards, but also can meet the practical needs of domestic seed testing work. This standard is a major change of Chapter 7 of GB/T 2930-1982: the number of species to be sampled has been increased, the number of species with the required rate and the mean rate has been increased, and the assumptions on the number of species and the tolerance have been supplemented. This standard is one of the series of standards of GB/T 2930.1~2930.1-2001 seed inspection standards, which are composed of the following parts: GF/T 2930.1-2001 forage seed inspection - whole sampling purity - GH/T 2930.220C: GH/T 2930.220C: GB/T 2930.220D: Inspection procedures for harvested grass seeds 2030.2—2C01
Forage seed inspection regulations
GT3/12950.4—20303 Forage seed inspection regulations GB/T2930.%2CC! Forage seed inspection regulations G15/12530.6—2001 Agricultural product inspection regulations 1 Compared with grass seed inspection regulations
GB,T 2$3R,7—2001
Forage seed inspection regulations
G/T 2SAG.R—2301
Forage seed inspection regulations
GB/T2930.92001
G31 293C.15—2001
Testing procedures for harvested seeds
Determination of seed number in the pool
Growth test
Biochemical (seed) determination of vitality
Health determination
Species and variety identificationbZxz.net
Water content
Weight determination
Wildness determination of coated seeds
GR/T2938.112001
Testing procedures for forage seeds||t t||Test report
The format of the standard is somewhat different from that of the international standard. The international standard places all the appendices and the contents after the main text of the test report, while most of the contents of the standard are in the text. When using, they must be read in accordance with each other. In the compilation of this standard, the standard abbreviations of each item are used as separate texts, the main content is included in the text, and the relevant requirements are placed after the end of each mark. This standard replaces G Chapter B. Appendix 4 of this standard is the appendix of the standard.
This standard was proposed by the Ministry of Agriculture of the People's Republic of China. This standard was drafted by the Ministry of Agriculture's Animal Husbandry Supervision and Inspection Center (Lanzhou), and the Shanxi Provincial Department of Agriculture and Animal Husbandry participated in the drafting:
This standard was mainly drafted by Wang Yifei, and the participating personnel were: Bai Yuansheng, Zhao Leiqing, Yu Ling, Sun Lanhua, Dong. 7
GB/T:2935.8-20 01
ISTA Foreword
One of the greatest risks to the seed industry is that the variety planted does not meet its production capacity: seed testing is intended to assess the quality of the seed before planting. To reduce this risk, seed testing is a combination of different characteristics that are of great importance to all sectors of the seed industry - producers, processors, distributors, operators, farmers, certification agencies, and government agencies or departments responsible for seed management. In all cases, the ultimate goal of testing is to determine the value of the seed. The seed is a living product, and its condition cannot be accurately predicted as with testing of living or non-living products. The methods used must be based on a wide range of scientific knowledge and the requirements of the seed testing personnel will evolve with the determination of the testing conditions. This practice defines and reproducibly defines the standard methods that can be used to assess seed quality internationally. To this end, a high degree of accuracy and evolution of the testing methods is necessary. When seeds are traded across borders, they may be inspected in laboratories in different countries. Therefore, it is important that all inspections use a single standard method, which can ensure consistent inspection results within the same standards. This procedure is divided into two parts. The specification document explains the terms and conditions of the test, the definitions used, and an overview of the methods and procedures used. The appendix is an introduction to the text and details the procedures and methods specified in the specification. If the inspection results are in accordance with the specification, the International Seed Inspection Association must strictly abide by the specification. The interpretation of the specification document should be consistent with the details in the specification or the document. It is recommended that countries should adopt this specification and its characteristics as much as possible when implementing national seed quality management regulations in their domestic seed trade environment. Although it is not necessary to use the international seed certification in this case, it should be recognized that any inconsistency with the current practices and conditions accepted by the international community will hinder the free flow of seeds between countries. Consult the advisory restaurant> Try to conduct seed evaluation tests based on the requirements of the sender for special conditions: this test needs to be specific to the season, soil type and sea or high pressure. For this test, this specification and attached sheet only provide basic guidance, and other techniques in the relevant literature can be used as supplementary treatment. This specification is mainly developed for the dental industry. Although not applicable to every section, the general principles are also applicable to other crops not mentioned in this standard. In addition, in order to provide sufficient guidance, it is necessary to mention the equipment of specialized manufacturers. This does not mean that the right person is good at this device, but in addition to other products: 9 1 Scope National Standard of the People's Republic of China Rules for Inspection of Forage Seeds Moisture Determination Rules for forage seed lesling Determining moisture content This standard specifies the method for determining seed moisture content GA/ 2930.8—2001 2930—1982 This standard is used to determine the quality of grass seeds, turf grass seeds and other crop seeds. 2 Referenced Standards
The following standards contain provisions that, through reference in this standard, constitute the body of this standard. When this standard was published, the versions indicated were valid. All parties that use this standard should investigate the possibility of using the latest versions of the following standards. GBT2950.1-2031 Test Procedure for Single-Tax Seeds B/17-1? Test Value
3 Purpose of Test
This standard is used to determine the moisture content of seeds by conventional methods. 4 Definitions
This standard adopts the following definitions.
Moisturecontert
Dry the seed samples in order of specification and the weight loss is the percentage of the original sample weight. 5 Apparatus
a) Crusher:
6) Constant temperature oven (equipped with a temperature of U.5°C: a pressure gauge with a shaking volume of 0.01°C;
d) Product box, explosive agent, set (metal wire with a pore size of 0.5.1.0 and 4.m, etc. 5 Inspection procedures
6.1 Note on the moisture content of the received supply The test stand (which shall comply with the provisions of Chapter 1 of GB/T 2933.12001) shall be installed in a device to prevent penetration and remove air as much as possible. The sample shall be tested immediately after receiving it. During the determination process, the grinding scale shall be operated at a speed not exceeding the required time. 6.2 Approved by the Bureau of Quality and Technical Supervision on March 14, 2001, 200106-01, implementation, and shall be updated in units of " ", with a guaranteed inspection decimal of 5. 6.3 Test sample GB/T 2930.8—2001
The two independently collected samples should be compared. According to the size of the sample diameter used, the sample quantity should reach the following requirements: diameter less than 8m-5
diameter or larger than 8cm10g
Before taking the test sample, the sample to be tested must be fully mixed by one of the following methods: a) Stir in the sample container with a sensor:
b) Place the original sample in a dense stream of the same size and pour the seeds back and forth in the two streamers. The test results of each test product shall comply with the provisions of 7.2 of G2950.1-21: the exposure time of the sample to air shall not exceed 309. The types of seeds and their fineness before drying are shown in Table 1. Seeds and fineness of seeds crushed in the field. weliose
6.5 pre-supplied method
bamboo smoke
new pill
sudan grass
sea pea
Dongyuan mountain black bean
fang lupin
qingye purple flower moss
shushe pea
Chinese name
rough monument group medical
to the bottom of the score into. 5 yuan
sieve hole. The reading disease 1.3mm sieve hole on the ingredients
do not stay more than 13 years old
must have grinding, at least the right bu head slightly reduced ingredients oil more than 4.:. complaint
if enough need to add the seeds. Its moisture content is higher than 17% should be pre-dried. Take two secondary samples, weigh at least 25 g ± 9.2 g of each sample, and put them into the sample box. Place the two secondary samples in a constant temperature chamber (5 ~ 100 °C) until the moisture content is not less than 17%. Then, place the preliminarily dried samples in the test vehicle for 2 h. When the moisture content exceeds 30%, the samples should be placed in a warm place (heated test chamber) and dried overnight. After pre-drying for ten minutes, weigh the secondary samples in the sample box again and calculate the weight. Immediately thereafter, weigh the secondary samples separately and continue the test procedure described in 6.6. .6 Constant temperature drying method
According to 3, obtain the test sample and evenly store it in the sample box. Before and after placing the sample, weigh the weight of the box and the lid, and average the weight. When the drying temperature reaches 13)-133<, open the baking tray. When the drying temperature can reach the required temperature, calculate the drying time. The average drying time is 3, and the forage materials need 3, and the forage, grass and other fast-feeding crops need 11. After the specified time, cover the sample box and put it into the dryer for 35-mia before measuring. ? Calculation and display
7.1 Calculation and display| |tt||The moisture content is expressed as a percentage. Formula (1) is calculated to one decimal place. The numerical rounding point conforms to the provisions of GB/T 817U X1
Seed moisture content (device:
support account: M: - weight of the product box and the difference + R: CR/T2930.8-2001
4: sample box and the sample before drying ++ certificate sample and the difference and the sample after drying. The book uses the pre-medium method, which can be calculated from the night (item jumps down first): the European new fruit rice is calculated, and the moisture content is calculated twice by formula (1), and the original effective water content of the sample can be calculated by formula 2), ||tt ||Seed moisture <-s,
Where S-the percentage of moisture lost by the first seed after drying: $. The percentage of moisture lost by the first seed after grinding is 7.2%. Except for wood species, if the difference between two repeated measurements of a species does not exceed G.2, the result can be expressed as the technical average of the two measurements: For all,
shrub seeds, the allowable difference between repeated measurements can be expanded to .3~2.5 according to the size of the species and the original moisture content. See Appendix A (standard data) Table A1]3
CB/T 2930.8—2001
(Standard record)
Allowable vertical distance
According to this seed moisture distribution, the tolerance difference between the two weight bases is not determined. The seed size is different
small seed "
large light seed
1) Small seed refers to those seeds with a light number of more than 5DG0 seeds per gram. The average original moisture content is
12%~25%
2) Large seed refers to those seeds with a maximum moisture content of no more than 5000 seeds per gram, i52.2 Permissible difference
Except for wood species, if the difference between two repeated measurements of a species does not exceed G.2, the result may be expressed as the technical mean of the two measurements: For all shrub seeds, the permissible difference between duplicates may be extended to 0.3-2.5, depending on the size and initial moisture content of the species. See Appendix A (standard specification) Table A1]3
CB/T 2930.8—2001
(Standard record)
Allowable vertical distance
According to this seed moisture distribution, the tolerance difference between the two weight bases is not determined. The seed size is different
small seed "
large light seed
1) Small seed refers to those seeds with a light number of more than 5DG0 seeds per gram. The average original moisture content is
12%~25%
2) Large seed refers to those seeds with a maximum moisture content of no more than 5000 seeds per gram, i52.2 Permissible difference
Except for wood species, if the difference between two repeated measurements of a species does not exceed G.2, the result may be expressed as the technical mean of the two measurements: For all shrub seeds, the permissible difference between duplicates may be extended to 0.3-2.5, depending on the size and initial moisture content of the species. See Appendix A (standard specification) Table A1]3
CB/T 2930.8—2001
(Standard record)
Allowable vertical distance
According to this seed moisture distribution, the tolerance difference between the two weight bases is not determined. The seed size is different
small seed "
large light seed
1) Small seed refers to those seeds with a light number of more than 5DG0 seeds per gram. The average original moisture content is
12%~25%
2) Large seed refers to those seeds with a maximum moisture content of no more than 5000 seeds per gram, i5
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