Quality Control and Application of Organic Fertilizer

As an important support for sustainable agriculture, the quality control and scientific application of organic fertilizer directly affect agricultural production efficiency and ecological environment safety. With the implementation of the national standard NY525-2021 “Organic Fertilizers”, organic fertilizer production and application have entered a new phase of standardization and scientific management. National Standards: Foundation of Quality Assurance The current national standards establish clear quantitative indicators for organic fertilizer quality. Organic matter content must not be less than 45%, total nutrients (nitrogen, phosphorus, potassium) must reach above 5%, and moisture content must be controlled within 30%. These technical indicators ensure the nutritional value and application effectiveness of organic fertilizer. Simultaneously, strict limits on heavy metal content, ascaris egg mortality rate, and fecal coliform counts ensure environmental safety and hygiene standards of organic fertilizer. Quality control runs through the entire production process. Starting from raw material testing, heavy metal-contaminated materials are excluded from the production line. During fermentation, temperature, moisture content, and pH values need monitoring to ensure thorough decomposition. Before leaving the factory, every batch of finished products requires comprehensive testing, with unqualified products strictly prohibited from entering the market. Proper storage conditions are equally important, as dry and ventilated environments effectively maintain fertilizer efficacy. Scientific Application: Key to Maximizing Benefits Organic fertilizer application needs adjustment according to different crops and soil conditions. For field crops like wheat and corn, base fertilizer application of 200-500 kilograms per mu combined with deep plowing yields good results. Economic crops like vegetables and fruits require higher application rates, typically 500-1000 kilograms per mu, with best results achieved when applied 15-20 days before planting. The application of topdressing techniques is also important. Timely supplementation of organic fertilizer during crop growth periods can continuously supply nutrients. Foliar spraying of humic acid solutions is an effective method for rapidly supplementing organic nutrition. Scientific combination of organic and chemical fertilizers can both meet immediate crop nutrient needs and improve long-term soil fertility, avoiding soil degradation caused by exclusive chemical fertilizer use.

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