Soil microbial metabolism on carbon and nitrogen transformation links the crop-residue contribution to soil organic carbon

Autor: Zhihuang Xie, Zhenhua Yu, Yansheng Li, Guanghua Wang, Xiaobing Liu, Caixian Tang, Tengxiang Lian, Jonathan Adams, Junjie Liu, Judong Liu, Stephen J. Herbert, Jian Jin
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: npj Biofilms and Microbiomes, Vol 8, Iss 1, Pp 1-10 (2022)
Druh dokumentu: article
ISSN: 2055-5008
DOI: 10.1038/s41522-022-00277-0
Popis: Abstract 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.
Databáze: Directory of Open Access Journals
Pro tento záznam nejsou dostupné žádné jednotky.