Deciphering microbial mechanisms underlying soil organic carbon storage in a wheat-maize rotation system

被引：45

作者：

Wu, Xingjie ^{[1
]}

Liu, Pengfei ^{[2
]}

Wegner, Carl-Eric ^{[3
]}

Luo, Yu ^{[4
]}

Xiao, Ke-Qing ^{[5
]}

Cui, Zhenling ^{[1
]}

Zhang, Fusuo ^{[1
]}

Liesack, Werner ^{[6
]}

Peng, Jingjing ^{[1
]}

机构：

[1] China Agr Univ, Natl Acad Agr Green Dev, Coll Resources & Environm Sci, Key Lab Plant Soil Interact,Minist Educ, Beijing 100193, Peoples R China

[2] Lanzhou Univ, Ctr Pan Third Pole Environm, Lanzhou 730000, Peoples R China

[3] Friedridi Schiller Univ Jena, Inst Biodivers, D-07743 Jena, Germany

[4] Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Zhejiang Prov Key Lab Agr Resources & Environm, Hangzhou 310058, Peoples R China

[5] Univ Leeds, Sch Earth & Environm, Leeds LS2 91T, W Yorkshire, England

[6] Max Planck Inst Terr Microbiol, Res Grp Methanotrophk Bacteria & Environm Genomic, D-35043 Marburg, Germany

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2021年 / 788卷

基金：

中国国家自然科学基金;

关键词：

Bacteria; Fungi; Life history strategy; Metagenomics; MAGs; Organic carbon; COMMUNITY STRUCTURE; FUNGAL CONTRIBUTIONS; SEQUESTRATION; BACTERIAL; AGGREGATION; FERTILIZATION; MANAGEMENT; SEQUENCES; IMPACTS; QUALITY;

D O I：

10.1016/j.scitotenv.2021.147798

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A link between microbial life history strategies and soil organic carbon storage in agroecosystems is presumed, but largely unexplored at the gene level. We aimed to elucidate whether and how differential organic material amendments (manure versus peat-vermiculite) affect, relative to sole chemical fertilizer application, the link between microbial life history strategies and soil organic carbon storage in a wheat-maize rotation field experiment. To achieve this goal, we combined bacterial 16S rRNA gene and fungal ITS amplicon sequencing, metagenomics and the assembly of genomes. Fertilizer treatments had a significantly greater effect on microbial community composition than aggregate size, with soil available phosphorus and potassium being the most important community-shaping factors. Limitation in labile carbon was linked to a K-selected oligotrophic life history strategy (Gemmatimonadetes, Acidobacteria) under sole chemical fertilizer application; defined by a significant enrichment of genes involved in resource acquisition, polymer hydrolysis, and competition. By contrast, excess of labile carbon promoted an r-selected copiotrophic life history strategy (Cytophagales, Bacillales, Mortierellomycota) under manure treatment; defined by a significant enrichment of genes involved in cellular growth. A distinct life history strategy was not observed under peat-vermiculite treatment, but rather a mix of both K-selected (Acidobacteria) and r-selected (Actinobacteria, Mortierellomycota) microorganisms. Compared to sole chemical & nbsp;fertilizer application, soil organic carbon storage efficiency was significantly increased by 26.5% and 50.0% under manure and peat-vermiculite treatments, respectively. Taken together, our results highlight the importance of organic material amendments, but in particular a one-time peat-vermiculite application, to promote soil organic carbon storage as a potential management strategy for sustainable agriculture. (c) 2021 Elsevier B.V. All rights reserved.

引用

页数：11

共 82 条

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