This standard specifies the technical requirements, test methods, inspection rules, quality judgment, packaging, labeling, transportation and storage of rice seedling conditioner products. This standard applies to rice seedling conditioner products that provide nutrients for rice seedlings during the dryland period, regulate soil acidity, and have the effects of strengthening seedlings and resisting diseases; this standard does not apply to water-based rice seedling conditioner products. NY 526-2002 Rice Seedling Conditioner NY526-2002 Standard download decompression password: www.bzxz.net

Agricultural Industry Standard of the People's Republic of China
NY 526
Rice nursery soil conditioner2002-08-27 Issued
2002-12-01 Implementation
Ministry of Agriculture of the People's Republic of China
This standard is drafted in the third draft, the fifth clause, and the fifth clause. 7.1.7.2.7.3 are mandatory clauses, and the rest are recommended clauses. This standard is proposed by the Seed Management Department of the Ministry of Agriculture. NY 5262002
Standard drafting units: Fertilizer Quality Supervision and Inspection Center of the Ministry of Agriculture (Shenyang), National Quality Supervision and Inspection Center of Fanyang Agricultural University (Beijing), Fertilizer Quality Supervision and Inspection Center of the Ministry of Agriculture (Wuhan). The main contributors of this standard are: Chen Hongbin, Liu Shile, Cao Ganhua, Wang Min, Wang Zhongliang, Ding Lili, and Liu Shufa. 1 Scope
Rice seedling bed conditioner
NY526--202
This standard specifies the technical requirements, test methods, inspection and measurement, quality judgment, packaging, labeling, transportation and storage of rice seedling bed conditioner products:
This standard specifies the rice seedling bed conditioner products with ultra-low nutrients during the rice seedling period, with the function of strengthening and preventing diseases: This standard is not applicable to water-based type water-based conditioner products. 2 Normative references
The following documents are included in this standard through reference. The referenced documents with the date shall not be subject to any subsequent amendments (excluding errata) or revisions. However, all parties that have reached an agreement based on this standard are encouraged to use the latest version of this document. For any undated referenced documents, the latest version shall apply to this standard: GHH/T125F Methods for expressing limiting values ​​and determination methods G/T 6GN2 GBr8572 Determination of total water content in fertilizers by titration after distillation GB/T8573 Determination of effective solution content in mixed materials GB/T8574 Determination of water content in fertilizers by tetrahydrofuran method GB/T 8576 Determination of free water content in mixed fertilizers by air furnace method GB/T 14540. 4
Review of the method for measuring the content of nitrogen in fertilizer
GH15063—2001
Mixed fertilizers)
HGT2843
3 Technical requirements for standard titration, standard content, reagent content and indicator content in chemical analysis of fertilizer products
3.1 Appearance
Loose solid content.
3.2 Product technical indicators
Comply with the requirements of Table 1
Table Yongtao seedbed conditioning agent technical standards
Contains total phosphorus F0>%
N0%
Actual content (1
Gum separation (HS/%
Water HO%
New 2-(C:-)/55
NY 526--2002
4 Test method
4.1 Basic requirements
The reagents used in this standard are all analytical reagents unless otherwise specified. The water used in the laboratory should meet the requirements for grade 3 water specified in GB/T 6682: The standard fluid required in the test should meet the requirements of IIG/2R43. 4.2 AppearancebZxz.net
Visual latent determination,
4-3 Determination of total oxygen content (need to be adjusted after 4.4 Determination of effective phosphorus content (phosphoplatinum oxazolidinone gravimetric method) shall be carried out in accordance with GB/TB572. 4.5 Determination of potassium content 4.5.1 Potassium tetraphenyl oxadiazine gravimetric method When the sample oxidation content is high or equal to 10%, it shall be carried out in accordance with GB/T8574. 2.5.2 Fire path photometry When the test unit is When the content of potassium hydroxide in the sample is less than 2%, the potassium hydroxide method is used. 2.5.2.1. Method Summary
After the drug to be tested is extracted with water, it will emit a characteristic potassium hydroxide line. Within a certain range, the intensity of the line is proportional to the concentration of the element: the standard method can also be used to calculate the amount of potassium hydroxide in the sample. 4.5.2.2 Reagents and reagents
4.5.2.2.1: Potassium standard preparation ratio: standard Weigh 1.582g of potassium chloride (KCl standard reagent) prepared in T-21 at 110℃: dissolve in water and transfer to 100ml. Volumetric flask, and store in a 10% flask. The potassium content (K0) is 1.00 m/mL. 4.5.2.2.2 Potassium standard solution: Pipette 25.3mL of potassium standard solution (4-5.2.2.1) into a 250ml volumetric flask. Dilute with water until uniform. The potassium content of the sample solution is 1/ml. 4.5.2.3 Receiver and flame fusion spectrometer 4.5.2.4 Analytical steps 4.5.2.4.1 Preparation of sample solution Transfer the sample solution containing potassium (K>2) to 250mL in 15mL water, boil for 50min, cool and transfer the whole solution to a 250mL vial bottle, dilute to the mark with water and insert the hook. Filter and discard the first part of the solution.
4.5.2.4.2 Drawing of standard curve
Standard potassium standard solution (4.2.2.20, G ml 2.30mE .... 00ml. 10.00ml., 15.Crl.. 2C.am1 respectively: 5Uml. Volume, use water to release the gold scale, mix, this series of standard solution 1mL potassium (K0) is 3.05.Q0g108123000g40U with the concentration of 0.0g/m standard solution to adjust the instrument zero point, with the high liquid concentration of the standard solution to adjust to full width. Once again, measure the other standards from the concentration to full, let! Record the instrument display, use the instrument test as the ordinate, the corresponding year as the abscissa, draw the standard curve, 4. 5. 2. 4. 3 Determination
Pipette 10.00ml.-20.0:ml. of the sample liquid (4.5-2-41) into a 50 volumetric flask, the potassium (K0) concentration should be controlled in the range of 11x/mml.~2Fg/ml., dilute with water to the scale, and measure on a firebox photometer under the same conditions as the potassium standard liquid. Note down the indicated value, check the concentration on the standard line 3, and calibrate the instrument with standard liquid after measuring every 3 samples. 4.5.2.5 The table of analytical results shall be expressed as the mass fraction of weathering inhibition (K), and the content W (K0) shall be calculated by formula 1: Where:
W()=pXD× 50xU-0
The potassium concentration of the sample obtained from the standard practice is in micrograms per liter (g/liter). The sampling multiple (fixed volume/sampling volume) is: the air volume of the sample is in grams (R)
--the unit of the sieve is converted from grams (>). The results are guaranteed by the two fast center, and the arithmetic mean and the 4.5-2.6 allowable difference are taken before taking the parallel determination results. The absolute difference (%) of the parallel determination results should meet the requirements of Table 2. Table 2 Allowable difference K of parallel determination results contains
for the total
0 5 -- 1. Number
4.5.2. 6. 2 The absolute difference (%) of the results of different laboratories should meet the requirements of Table 3. Table 3 The allowable absolute difference of the results of different laboratories should meet the requirements of Table 3. 4.6 Determination of water-soluble zinc content Technical reference GB/1°14540.4 4.7 Determination of sodium hydroxide content 4.7.1 Summary of the method Use sodium hydroxide standard titration to obtain the sodium hydroxide in the sample. According to the amount of sodium hydroxide solution, the sodium hydroxide content is calculated. 4.7.2 Reagents and standards 4.7.2.1 Sodium hydroxide standard titration solution (NaOH) = 0.1 mal /T.
4.7.2. 2. Weigh 0.2% of the indicator (2%/L) and dissolve it in 6 mL of sodium hydroxide solution (4.7.2.1) and 5 mL of 95% ethanol. Transfer the sample to mL with water.
4.7.3. Instruments:
General laboratory instrument:
Magnetic field meter, the joint is C.52PH unit
[1] Magnetic thruster:
c) 30mT. The detector is about 401/min.
4.7.4.7.4.1 Acidometer method (acidity test) Take 5g of the sample (accurate to 0.01g) and transfer it to a 25ml volumetric flask. Add 100ml of water. After 15min, dilute the sample with water to the mark and swirl. Squeeze the liquid and filter, discarding the first part of the filtration. Pipette 6.5mL of the sample into a 250ml beaker, add about 150mL of water, place the beaker on an agitator, place the electrode on the juice in a micrometer, stir vigorously, and titrate with sodium hydroxide standard titration solution (4.7.2.1) at the same time. 4.5. NY526-2003 4.7.4.2 Indicator method Take 1.7 4.1 filtrate 5 ml (1.7.2) in a 250 ml conical flask, dilute with water to 15 ml, add 0.5 μL of formazan (4.7.2). Titrate with standard sodium hydroxide (1.7.2.1) until the liquid drops to green, which is the end point. 4.7.5 Description of analytical results
Expressed as mass fraction of the value energy: free combined amount W (HSC) calculated according to formula (E), WX) = c2Vx GP492× 1m
test volume, unit is g (:
c-the concentration of standard sodium hydroxide titration drop, unit is mole per liter
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