Straw mulch improves soil carbon and nitrogen cycle by mediating microbial community structure and function in the maize field

• DOI: 10.3389/fmicb.2023.1217966
• Publication Date: 2023-07-18T09:43:34Z
• Authors: Bangyan Liu; Yisha Dai; Xin Cheng; Xian He; Qicheng Bei; Yifan Wang; Yuling Zhou; Bo Zhu; Kangping Zhang; Xiaoqin Tian; Meichun Duan; Xiaoyu Xie; Longchang Wang
• Keywords: Soil carbon; Bulk soil; Nitrogen Cycle

This study was conducted to investigate the capability of microbial community characteristics and soil variables promote carbon nitrogen cycles in maize fields under straw mulch. We covered surface field with different amounts wheat (0 kg/ha, 2,250 4,500 kg/ha) used 16S rRNA ITS sequencing, Biology ECO-plate, traditional enzymology, TOC analyzer, HPLC measure bacterial fungal composition functions, source metabolism, fraction, enzyme activity, organic acid content rhizosphere non-rhizosphere. The results indicated that short-term mulch insignificantly affected alpha diversity communities whereas significantly influenced their beta diversity. functional prediction revealed considerably boosted relative abundances bacteria belonging chemoheterotrophy, aerobic ureolysis, fixation inhibited fermentation nitrate reduction soil. These processes primarily drove C N Straw also improved saprotrophs by raising proportion Chaetomiaceae Chaetosphaeriaceae. ECO-plate illustrated weakened metabolism capacity labile resources. As a result, fractions were raised Our showed regulated structure decreasing Firmicutes Ascomycota abundance while increasing Basidiomycota. is more than for affecting biomass carbon, readily oxidizable dissolved available nitrogen, ammonium, directly indirectly through malic cellulase, protease, amylase activity. Overall, our findings imply might influence structures, thereby boosting production components accelerating cycle fields.