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What kinds of fertilizer can be used to produce pollution-free agricultural products
In the process of producing pollution-free agricultural products, we must follow the principle of optimizing formula fertilization and organic fertilizers to maintain or increase fertility and soil biological activity. All fertilizers, especially those rich in nitrogen, should not have adverse consequences on the environment and crops (nutrition, taste, quality and plant resistance). Types of fertilizers that are allowed to use: 1. Organic fertilizer: compost, manure, manure, biogas, green manure, crop straw, and cake manure. 2. Inorganic fertilizer: mineral nitrogen fertilizer, mineral potassium fertilizer, mineral phosphate fertilizer (phosphorus ore), limestone; nitrogen fertilizer (including ammonium bicarbonate, ammonium sulfate) and phosphate fertilizer (including phosphoric acid) formulated according to the optimized formula fertilization technology program guided by soil fertilizer and agricultural technology department Diammonium, monoammonium phosphate, superphosphate, calcium magnesium phosphate, potassium fertilizer and other inorganic compound fertilizers that meet the requirements. Trace element fertilizer: Fertilizer mainly made of copper, zinc, iron, manganese, boron, molybdenum and other trace elements and beneficial elements. Medium-element element fertilizer: Fertilizer mainly formulated with medium-gravity elements such as calcium, magnesium, sulfur and silicon. 3. Microbiological Fertilizers: Plant growth assistant fertilizers, natural organic extracts or broths for inoculating beneficial bacteria, and fertilizers formulated with humic acid, alginic acid, amino acids, vitamins, and sugars (including active four-dimensional fertilizer and soil activity) Agent and rhizobia, nitrogen-fixing bacteria, phosphorus bacteria, silicate bacteria and other microbial compound fertilizer). 4. Compound Fertilizer: Organic and inorganic compound fertilizers formulated with two or more of the above fertilizers and formulated according to scientific formulas.