The Green Manure (Astragalus sinicus L.) Improved Rice Yield and Quality and Changed Soil Microbial Communities of Rice in the Karst Mountains Area

The use of green manure plants for soil restoration is a viable agricultural practice that can mitigate degradation and biodiversity loss caused by the long-term application inorganic fertilizers. However, effects on microbial communities, rice yield, quality in karst mountains are largely unknown. no chemical fertilizer, fertilizer + different Astragalus sinicus L. (Chinese milk vetch, CMV) treatments community, enzyme activities, nutrient content, crop yield were investigated through field experiments. A moderate with increase chlorophyll effective spikes, positive impact crude protein, etc. Additional amount CMV alkali-hydrolyzable nitrogen available phosphorus (a significant 54.87–72.65%), improve biomass carbon (MBC) (MBN) (CFMV2 significantly increased 22.16%), urease phosphatase activity 43.43–69.24% compared to CK. Moreover, all bacterial communities dominated three major phyla (Proteobacteria, Chloroflexi, Acidobacteria), where ratio abundance Proteobacteria Acidobacteria soils, effect dominant bacteria was regulated some extent additional application, which may have beneficial yield. Therefore, we conclude rational fertilizers (22,500 kg ha?1) landscapes one measures achieve efficient sustainable fields.