Decomposition of Rapeseed Green Manure and Its Effect on Soil under Two Residue Return Levels

The overuse of chemical fertilizers has caused various ecological problems in China, necessitating the development organic alternative fertilizers. There are few studies on rapidly emerging fertilizer rapeseed green manure, despite importance understanding its decomposition efficiency and impact soil. In this study, using plant residue from 14 cultivars, we examined 30-day changes under conditions A B (150 300 g returned, respectively) detected effects their soil nitrogen, phosphorus, potassium, microorganisms. Under condition B, cumulative nutrient release rates were higher than those A, rate exceeded 50% both conditions, which is similar to results legume Moreover, manure significantly increased content effectively improved bacterial community structure diversity relative original soil, especially B. Thiobacillus, Azotobacter, Pseudomonas bacteria that responded decomposition, abundance three genera after was correlated with traits content. conclusion, potential offset use fertilizers, promoting sustainable agricultural development, study provides a reference for such fertilization measures.