Effect ofstraw returning on microbial community structure of soil aggregates. soil microbial community

Straw, as an important biomass resource, contains a lot of nutrient elements. When it is applied to the soil, it can improve the soil nutrient content, reduce the soil compactness, increase the soil porosity, stabilize the soil structure and affect the soil microbial community. Soil microorganism is the most important and active part of the soil ecosystem, which plays an important role in maintaining the stability of the ecosystem, ensuring the transformation and circulation of soil nutrients and the normal operation of ecological functions. Aggregate is the basic unit of soil structure formation, which determines the quality characteristics of soil. Understanding the distribution of microorganisms in soil aggregates can lay a foundation for predicting related biochemical processes, such as carbon, nitrogen and phosphorus cycling, soil aggregate stability, etc.