Green manure alone or combined with straw delivers agronomic benefits with lower methane emission efficiency than straw incorporation in a subtropical paddy soil
Based on an eight-year double-rice field experiment, eight treatments were established in this study, including conventional N fertilization (N100), RS with conventional N fertilization (RN100), GM with conventional N fertilization (GN100), GM and RS with conventional N fertilization (GRN100), 40% reduced N fertilization (N60), RS with 40% reduced N fertilization (RN60), GM with 40% reduced N fertilization (GN60), and GM and RS with 40% reduced N fertilization (GRN60). We characterized the community composition of CH4-related microorganisms in response to GM, RS, NR and their interactive effects.