soil microbial diversity

Green manure, as a high-quality organic fertilizer, has a good role in fertilizing the ground and improving soil structure. Using the recreational period to plant green manure and turning and returning it to the field is considered an important measure to establish ecologically sustainable agriculture. At present, the research on continuous cropping obstacles of flue-cured tobacco still focuses on the effects of continuous cropping on the growth and development of tobacco plants, pests and diseases, and soil microecology, but there are few reports on the effects of green fertilizer on soil properties, soil microorganisms, and flue-cured tobacco yield and quality of continuous cropping as far as we know. Ryegrass is an important resource of green manure. In this study, ryegrass was continuously returning to the field for three years, and the responses of soil physicochemical properties, flue-cured tobacco yield and quality, and soil microbial community structure to ryegrass tillage and return were studied.