气候变化领域集成服务门户(CCPortal): Fungi determine increased soil organic carbon more than bacteria through their necromass inputs in conservation tillage croplands

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DOI	10.1016/j.soilbio.2022.108587
	Fungi determine increased soil organic carbon more than bacteria through their necromass inputs in conservation tillage croplands
	Yang, Yali; Xie, Hongtu; Mao, Zhun; Bao, Xuelian; He, Hongbo; Zhang, Xudong; Liang, Chao
发表日期	2022
ISSN	0038-0717
EISSN	1879-3428
卷号	167
英文摘要	Stover mulching over no-till soil is regarded as a promising practice to increase soil organic carbon (SOC) in croplands against climate change. Microbial necromass is a significant source of SOC stock and unequivocally controlled by the microbial community. Yet, a complete link that spans from agricultural practices to microbial community features, to soil necromass C, and eventually to SOC is poorly understood. Here, we conducted a 10-y corn field experiment with five treatments, which included conventional tillage (CT), no-tillage without stover (NT-0), and no-tillage with low, medium, and high amounts of stover mulching (NT-low, NT-medium, and NT-high) in a Molisol of northeastern China. We investigated the stocks and changes in total SOC and its microbial necromass C along a soil depth down to 40 cm, and we evaluated how SOC dynamics and stabilization processes were associated with microbial community features. We characterized microbial community diversity and structure using 16S rRNA and internal transcribed spacer (ITS) sequencing, and we characterized microbial biomass and necromass using phospholipid fatty acid and amino sugar biomarkers. Compared with conventional tillage, no-tillage with medium and high amounts of stover mulching increased SOC stocks in the upper 0-40 cm of soil by > 0.4% per year. No-tillage treatments (without and with stover) had almost no effect on the proportion of total microbial necromass C to SOC, but greatly modified the ratio of fungal necromass C to bacterial necromass C, which increased in top layers (0-5 cm) and decreased in deep layers (10-40 cm). SOC was governed mainly by fungal necromass C, which was correlated positively with fungal biomass. Fungal necromass C, not bacterial necromass C, was more closely associated with microbial community composition. Our results suggested that no-tillage with medium stover mulching was the optimal treatment to achieve the best trade-off between stover input and SOC storage. Differentiating microbial C pools from total SOC and, notably, separating fungal and bacterial necromass C pools can refine our mechanistic understanding of SOC storage as well as its association with microbial biota.
英文关键词	Soil organic carbon; 4 per 1000; Tillage; Stover mulching; Microbial community; Microbial necromass carbon
语种	英语
WOS研究方向	Soil Science
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000776076500006
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/281032
作者单位	Chinese Academy of Sciences; Shenyang Institute of Applied Ecology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; INRAE; Centre National de la Recherche Scientifique (CNRS); Universite de Montpellier; CIRAD; Institut de Recherche pour le Developpement (IRD)
推荐引用方式 GB/T 7714	Yang, Yali,Xie, Hongtu,Mao, Zhun,et al. Fungi determine increased soil organic carbon more than bacteria through their necromass inputs in conservation tillage croplands[J],2022,167.
APA	Yang, Yali.,Xie, Hongtu.,Mao, Zhun.,Bao, Xuelian.,He, Hongbo.,...&Liang, Chao.(2022).Fungi determine increased soil organic carbon more than bacteria through their necromass inputs in conservation tillage croplands.SOIL BIOLOGY & BIOCHEMISTRY,167.
MLA	Yang, Yali,et al."Fungi determine increased soil organic carbon more than bacteria through their necromass inputs in conservation tillage croplands".SOIL BIOLOGY & BIOCHEMISTRY 167(2022).