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First, increase the application of organic manure. Compost, manure, cake fertilizer, manure and manure, river mud, etc. are all good organic fertilizers.
Second, advocate the return of straw to the field. Studies have shown that straw directly returning to the field is better than applying the same amount of manure. At present, the straw returning technology with wheat sorghum as the main measure is strongly advocated. When harvesting wheat, 20-30 cm high wheat straw is left. After a rainy season, the wind and sun are raining. When the wheat is replanted, it has become Semi-decomposed state, it becomes a good organic fertilizer. Straw returning to the field is simple and easy, saving labor and labor, but when returning to the field, chemical nitrogen fertilizer should be applied to avoid microbial and crop nitrogen.
Third, grain and fertilizer rotation, intercropping, land use and land combination. With the development of agricultural production, the multiple cropping index is getting higher and higher, resulting in a decrease in soil organic matter content and a decrease in fertility. The implementation of grain and fertilizer rotation and intercropping system can not only maintain and improve the organic matter content, but also improve the quality of soil organic matter and activate the aging humus.
Fourth, cultivate green manure. The cultivated green manure can provide abundant organic matter and nitrogen for the soil, improve the agro-ecological environment and the physical and chemical properties of the soil. The main varieties are alfalfa, mung bean, and tianjing. It can be sown in the spring, summer and autumn seasons. Generally, it is used for 1 to 1.5 kg per mu, and it is pressed during the flowering period. Mung bean and Tianjing can be sown from March to June. Generally, 3-5 kg ​​per mu is used, and it is pressed at the beginning of flowering.
Soil organic matter refers broadly to carbon-containing organic compounds present in various forms in the soil. For low-yield fields, the organic matter content can be increased by the following methods to fertilize the soil. For high-yield fields, organic matter needs to be continuously replenished due to the continuous decomposition of organic matter.
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