How to increase the content of organic matter in land?

How to increase the organic content of the soil? Please introduce the method can refer to the following methods to increase the content of organic matter in the land: First, vigorously promote straw return to the field. Straw returning is an important way to increase soil nutrients, improve soil organic matter content, improve soil physical and chemical properties, potassium and phosphorus nutrition conditions, and enhance soil microorganisms and enzyme activities. Especially in recent years, the early rice straw mulching, late rice no-tillage cultivation technology, wheat field, rape, Chinese milk vetch and early crop mulching technology popularized in various places not only adapt to the characteristics of current agricultural production, but also play multiple roles such as increasing fertilizer with grass, keeping moisture with grass, regulating temperature with grass, protecting soil with grass, pressing grass with grass, saving labor and so on, and have multiple advantages of organic fertilizer, biological mulching film and soil protection vegetation. This technology not only has the basic characteristics of traditional agriculture, but also has the characteristics of modern agriculture. It has strong vitality and broad development prospects. Second, vigorously develop economic green manure. Developing green manure production is an effective way to increase organic nitrogen source and enrich phosphorus, potassium and trace elements in soil. At the same time, green manure is the link between agriculture and animal husbandry. The nitrogen resource contained in green manure exists in the form of protein, which can directly provide the essential protein source for human and livestock, and is a high quality animal feed. To develop green manure production, we must take the road of grain manure, vegetable manure and feed manure, improve the direct economic benefits of green manure, and fully display the strong vitality of green manure in agricultural production. Third, efforts should be made to improve the utilization rate of human and livestock manure. The preservation, accumulation and application of farm manure have a long history in China. In the 1960s, farmers summed up the experience of "four diligence"(frequent sweeping, frequent pad, frequent output, frequent accumulation) and "eight have"(cattle have pens, pigs have pens, ash has houses, manure has pools, people have toilets, chickens and ducks have earth temples, manure in the season, and green manure in the fields). We should further sum up these traditional experiences and gradually improve and continue to carry them forward. Fourth, vigorously promote commercial organic fertilizers. Since entering the 21st century, refined organic fertilizer, organic and inorganic compound fertilizer has become a "rookie" in the fertilizer industry. Looking forward to the development trend of fertilizer in this century, organic fertilizer will be applied to soil in the form of commercial organic fertilizer, organic and inorganic compound fertilizer, except directly or after treatment. With the increasing demand for organic fertilizer in green food production, organic and inorganic compound fertilizers will gradually develop into organic fertilizers. A small amount of inorganic fertilizer will be transported to the organic fertilizer resource concentration area, and the proportion of nitrogen, phosphorus and potassium in organic fertilizer will be adjusted or the available nitrogen in organic fertilizer will be increased to give full play to the role of organic fertilizer. Application of organic fertilizer, is the combination of traditional agricultural technology and modern agricultural science and technology, is the relationship between inheritance and development, but also the best way of material recycling in the process of production and life, only more manure field, with fertilizer to manage, in order to achieve the purpose of enhancing soil fertility. Click for more organic fertilizer application techniques Click for more chemical fertilizer application techniques