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Second, pay attention to strengthen water management. The condition of soil moisture is an important factor in determining the speed of straw decomposition. Therefore, the straw is directly returned to the field and the straw must be shredded and then buried in the soil. The depth of burial is about 20 cm. Must be covered tightly to prevent running away. Poor soil moisture, after ploughing should be filled with water, and good sensation should be suppressed security, promote soil compaction, in order to facilitate decomposition of straw water.
Third, pay attention to turning time and methods. Straw returned to the field to try to harvest while burying, because the early harvest more water, timely burial conducive to decomposition.
Fourth, pay attention to supplementary nutrition. Supplementing nutrients is to solve the contradiction between microbial and crop seedlings competing for nutrients. Because the carbon-nitrogen ratio of straw in general food crops is very low, if no chemical nitrogen fertilizer is added, microorganisms will inevitably compete with crop seedlings for available nitrogen in the soil and affect the normal growth of seedlings in order to decompose organic matter. Therefore, when returning straw, it is better to apply nitrogen fertilizer and adjust the ratio of carbon to nitrogen to about 30:1. Superphosphate can also be properly added to increase nutrients, accelerate decomposition, and increase fertilizer efficiency.
Fifth, pay attention to avoid disease transmission. In order to reduce the spread of pests and diseases, straws such as barley, wheat, corn, and soybeans with serious diseases and pests should be avoided directly, and these straws can be directly used for high temperature stacking.
First, pay attention to the amount of straw burial. When the straw is directly returned to the field, the amount of buried burial should not be too much, generally less than 500 kg per mu, otherwise it will not only affect the speed of straw decomposition, but also produce various organic acids in the process of decomposition of straw, and damage to the crop root system. effect.