Important role of Organic Fertilizer in Agricultural production

First, comprehensive nutrients, long-lasting organic fertilizer not only contains a large number of essential nutrients and trace elements, but also rich in organic nutrients, such as humic acid, vitamins, auxins, antibiotics and small molecular compounds of organic nitrogen and phosphorus. So organic fertilizer is the most comprehensive fertilizer. In addition, the application rate of organic fertilizer is allowed to vary greatly, which generally does not harm the growth of crops. The application of organic fertilizer not only increases the yield of crops in the current season, but also can be effective after the year, and the fertilizer effect is slow and lasting. Second, improve soil physical and chemical properties, improve soil fertility, organic fertilizer contains a lot of organic matter, the general content is about 200g / kg. Organic matter is an important material basis of soil fertility. The main body of soil organic matter is humus, accounting for 50%-65% of the total soil organic matter. Humus is a kind of complex organic colloid, which can adjust and buffer the acidity and alkalinity of soil, increase the exchange capacity of soil cations and improve the fertilizer conservation performance of soil. Increasing the content of soil organic matter is beneficial to the formation of good soil structure, especially the increase of water-stable aggregate structure, so as to improve the tightness, ventilation, water retention and heat condition of soil. it plays a good role in determining the water, fertilizer, gas and heat conditions of soil fertility. It is beneficial to improve the physical and chemical properties of soil and improve soil fertility. Promoting the activity of soil microorganisms soil microorganisms play an important role in the transformation of organic matter, and it is one of the important indicators to measure the level of soil fertility. For example, the mineralization process of organic matter in soil, the effective process of organic nitrogen and phosphorus in soil, and the process of biological nitrogen fixation of legumes are all related to the role of soil microorganisms. Therefore, on the one hand, the application of organic fertilizer increased the number and population of soil beneficial microorganisms, on the other hand, it provided good environmental conditions for soil microbial activities, which significantly enhanced soil microbial activities. Maintaining and promoting soil nutrient balance various nutrients absorbed by plants from the soil can be returned to the soil through the application of organic fertilizers and in the form of plant residues. The degree of regression mainly depends on whether various organic fertilizer sources are fully accumulated, reasonable accumulation and application and residue return rate. Only by grasping this balance link in agricultural production can the soil fertility rise spirally under the condition of combined application of chemical fertilizer. Therefore, the application of organic fertilizer is an important measure to improve soil fertility. Fifth, to reduce the input cost of fertilizer, organic fertilizer can be used locally and applied locally, with a wide range of sources and low cost. by increasing the application of organic fertilizer, it can not only improve soil fertility and increase soil nutrients, but also improve the utilization rate of chemical fertilizer and reduce the application amount of chemical fertilizer. so as to reduce the input cost of agriculture. The characteristics and functions of the above organic fertilizer determine its irreplaceable important role in modern sustainable agriculture.