Trace Element Bioavailability Shapes Bacterial Communities and Biological Nitrogen Fixation in Paddy Soils
Biological nitrogen fixation (BNF) is a key nitrogen source in paddy soils, yet its spatial variability remains poorly understood. In this study, we conducted a 90-day 15N2 labeling experiment using soils from seven paddy fields in Zhejiang Province, China, to quantify total nitrogen fixation and fixed-N accumulation i...