People use fertilization to increase crop yield, improve product quality, increase economic efficiency, and maintain and increase soil fertility. Organic fertilizer is an indispensable fertilizer for the production of green foods. First, it can improve the soil fertility; second, it can reduce soil pollution; third, it has a nutritional effect.
Organic fertilizers need to be detoxified
The application of organic fertilizers that have not been detoxified may result in food contamination that is more severe and difficult to prevent than chemical fertilizers. Chemical pollution is an important factor in the excessive content of harmful substances in domestic garbage. Organic pollutants mainly originate from batteries, electrical appliances, paints, and pigments. Organic wastes such as municipal waste and human and animal wastes contain a large number of pathogens, and these viruses live longer in the soil. According to the survey, vegetables such as cauliflower, cucumber, lentils and eggplant are heavily contaminated by E. coli, and potatoes, sorghum, bamboo shoots, radish, onions, and cabbage are heavily contaminated by parasite eggs. The development and application of commodity organic fertilizer is a new field for the development of organic fertilizers. It meets the needs of the market economy and has a reliable product quality. It can be used as one of the main fertilizers for green food production. At present, there are mainly three categories of commodity organic fertilizers: First, urban waste compost, which is mainly distributed in large cities. The second is active organic fertilizers. The main raw materials are livestock wastes and agricultural wastes and agricultural and sideline products. After adding fermentation microorganisms, they are fermented and dehydrated and made harmless. The third is humic acid, amino acid special organic fertilizer, rich in organic nutrients and plant growth regulators.
Fertility can be applied in a timely manner
Appropriate application of chemical fertilizer can cultivate fertility and improve food quality. Fertilizer can supplement soil nutrients and balance crop nutrition, thereby promoting crop growth and improving the quality of agricultural products. The nutrient that crops draw from chemical fertilizers is exactly the same as that of the same nutrient elements that they extract from organic fertilizers. Organic matter in organic fertilizers generally cannot be directly absorbed by crops but must be decomposed into the same ingredients as fertilizers before they can exert their nutritional effects. The relationship between chemical fertilizers and food quality is relatively close, and it can be concluded that the proper application of chemical fertilizers is beneficial, and improper application is harmful. Phosphorus and potash fertilizers have a significant role in promoting the quality improvement of agricultural products. Fertilization should do a good job in the balance of the five aspects of "soil testing, formula, fertilizer application, fertilizer supply, and fertilization technical guidance", and the utilization rate of chemical fertilizers should be increased from the current 30% to more than 45%. Fertilizers in production must be applied with organic fertilizers, and the ratio of organic nitrogen to inorganic nitrogen should not exceed 1:1. For example, applying 100 kg of high quality manure fertilizer and 1 kg of urea has good results. The last top-dressing of agricultural products must be carried out 30 days before harvest.
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