Applying organic fertilizer is beneficial to environmental protection. The eutrophication of the water environment in China mainly comes from the discharge of solid organic wastes into the water body, and the discharge of fertilizer nutrients from farmland only accounts for a small proportion. At present, the eutrophication degree of the water environment in China's lakes is still very serious. For Taihu Lake, Dianchi Lake, Chaohu Lake, Dongting Lake, Poyang Lake and other lakes, cutting off the input of organic and inorganic nutrients into the water body is the only way to achieve the prevention and control of water eutrophication. The development of organic fertilizer industry and the protection of water environment in the development of fertilizer industry is a great cause that combines fertilizer industry, soil fertility and water environment protection, high quality and high yield of crops.

The process flow of manure organic fertilizer production line is as follows: after the fermentation of organic fertilizer raw materials (animal manure, domestic garbage, dead branches and leaves, biogas residue, waste bacteria, etc.), they enter the semi-wet material crusher for crushing, and then add nitrogen, phosphorus and potassium (pure nitrogen, phosphorus pentoxide, potassium chloride, ammonium chloride, etc.) to make the mineral elements meet the required standards, and then have a mixer to stir, and then enter the organic fertilizer granulation mechanism particles, and then dry after coming out, The qualified products are screened by the screening machine and packed. The unqualified products are returned to the granulator for granulation.

Applying organic fertilizer is one of the main ways to improve soil fertility. Soil is the main natural resource of agricultural production, and crop production can fundamentally be said to be soil production. Due to its high microbial activity, high-fertility soil has a stronger ability to eliminate environmental pollution, so that sudden pollution events will not immediately or to a greater extent pollute agricultural products, or even enter the food chain and endanger human health. High fertility soil can also significantly improve the quality and flavor of agricultural products and significantly prolong the fresh-keeping period of vegetables and fruits due to its strong ability to coordinate soil water, fertilizer, air and heat, continuous and stable nutrient supply, and strong soil microbial and enzyme activity, which is the theoretical basis for organic fertilizer and production of "delicious food".

More application of bio-fertilizer and organic fertilizer will help to change the thinking method of fertilizer application and seeding method of chemical agriculture, and then guide farmers to embark on an ecological and organic agricultural development path with Chinese characteristics.