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Fertilizers that produce aa grade green foods follow the following principles:
1. It is forbidden to use any chemical synthetic fertilizer.
2. It is forbidden to use municipal garbage and sludge, hospital waste, and garbage containing harmful substances (such as poisonous gas, pathogenic microorganisms, heavy metals, etc.).
3, the producers should adopt the form of straw returning to the field, returning the abdomen to the field, and directly pressing the field to cover the field.
4. Rational use of green manure by means of covering, turning, stacking, etc. The green manure should be turned over during the full flowering period, and the depth of the burying is about 15cm. The cover soil should be strict, and the soil should be turned over and evenly. 15-20 days after pressing, can be planted or transplanted.
5. Decomposed biogas liquid, residue and human and animal excrement can be used as top dressing. It is strictly forbidden to apply unfertilized human excrement.
6, cake fertilizer is preferentially used for fruits, vegetables, etc., it is forbidden to apply unfertilized cake fertilizer.
7. Foliar fertilizer quality should meet the technical requirements of gb/t17419, or gb/t17420, or b3 in Appendix b, diluted according to the instructions, and sprayed 2-3 times during the crop growth period.
8. Microbial fertilizer can be used for seed dressing, and can also be used as base fertilizer and top dressing. When using, strictly follow the instructions in the instruction manual. The number of effective live bacteria in microbial fertilizers should be in accordance with 4.1 and 4.2 technical indicators in ny227.
9. The calcined phosphate and potassium sulfate in the inorganic (mineral) fertilizer should be selected, and the quality should meet the technical requirements of b1 and b2 in Appendix b of the agricultural standard ny/t394-2000.
Fertilizers that produce grade a green foods follow the following principles:
1. It is forbidden to use nitrate nitrogen fertilizer.
2, chemical fertilizer must be combined with organic fertilizer application, the ratio of organic nitrogen under inorganic nitrogen does not exceed 1:1, for example, 1000 kg of high-quality glutinous fertilizer plus 10 kg of urea (the fertilizer is used as base fertilizer, urea can be used as base fertilizer and top dressing). The last top dressing for leafy vegetables must be carried out 30 days before harvest.
3. Fertilizer can also be applied in combination with organic fertilizer and compound microbial engineering fertilizer. 1000kg of manure, 5-10kg of urea or 20kg of diammonium phosphate, 60kg of compound microbial fertilizer (base fertilizer, urea, diammonium phosphate and microbial fertilizer for base fertilizer and top dressing). The last top dressing must be carried out 30 days before the harvest.
4. Urban domestic garbage must be treated in a harmless manner, and the quality can reach the technical requirements of 1.1 in gb8172. The annual limit of the amount of farmland per mu, the viscous soil does not exceed 3000kg, and the sandy soil does not exceed 2000kg.
5. If the straw is returned to the field, a small amount of nitrogen fertilizer can be applied to adjust the carbon to nitrogen ratio.
6. Producers should also follow the production of aa grade green food fertilizers in accordance with 4 to 9 of the following principles.
In addition, the farmhouse fertilizers that produce green foods must be fermented at high temperatures regardless of the raw materials (including human, livestock, poultry, scum, weeds, peat, etc.) to kill various parasite eggs and pathogens and weed seeds. To make it meet the standards of harmless hygiene. Farmhouse fertilizers are used locally in principle for local production. The external farmer's fertilizer should be confirmed to meet the requirements before it can be used. Commercial fertilizers and new fertilizers must pass the registration certification and production license of the relevant state departments, and the quality indicators should meet the requirements of relevant national standards. When soil fertility is caused by fertilization, pollution is not caused, or crop growth is affected, and agricultural products fail to meet sanitary standards, the application of the fertilizer should be stopped and reported to a specialized regulatory agency. Green food labels cannot be used with the foods they produce.
Green food production fertilizer use rules
In green food production, fertilizer use must meet the crop's need for nutrients, returning enough organic matter to the soil to maintain or increase soil fertility and soil biological activity. All organic or inorganic (mineral) fertilizers, especially nitrogen-rich fertilizers, can be used without adverse effects on the environment and crops (nutrition, taste, quality and plant resistance).
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