矿化(土壤科学)
作物残渣
氮气循环
修正案
环境化学
残留物(化学)
土壤碳
微生物种群生物学
化学
固碳
氮气
土壤水分
土壤有机质
生物降解
微生物降解
基因组
农学
微生物
环境科学
生物
土壤科学
生态学
细菌
生物化学
有机化学
基因
法学
农业
遗传学
政治学
作者
Zhihuang Xie,Zhenhua Yu,Yansheng Li,Guanghua Wang,Xiaobing Liu,Caixian Tang,Tengxiang Lian,Jonathan M. Adams,Junjie Liu,Judong Liu,Stephen Herbert,Jian Jin
标识
DOI:10.1038/s41522-022-00277-0
摘要
The beneficial effect of crop residue amendment on soil organic carbon (SOC) stock and stability depends on the functional response of soil microbial communities. Here we synchronized microbial metagenomic analysis, nuclear magnetic resonance and plant-15N labeling technologies to gain understanding of how microbial metabolic processes affect SOC accumulation in responses to differences in N supply from residues. Residue amendment brought increases in the assemblage of genes involved in C-degradation profiles from labile to recalcitrant C compounds as well as N mineralization. The N mineralization genes were correlated with the C and N accumulation in the particulate and mineral-associated C pools, and plant-derived aliphatic forms of SOC. Thus, the combined C and N metabolic potential of the microbial community transforms residue into persistent organic compounds, thereby increasing C and N sequestration in stable SOC pools. This study emphasizes potential microbially mediated mechanisms by which residue N affects C sequestration in soils.
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