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Long-term N addition accelerated organic carbon mineralization in aggregates by shifting microbial community composition

文献类型：期刊论文

作者Zhang, Yu1,2,3,4; Shangguan, Zhouping1,2,3,4,5
刊名AGRICULTURE ECOSYSTEMS & ENVIRONMENT
出版日期2023-02-01
卷号342页码:11
ISSN号0167-8809
关键词SOC mineralization Microbial community composition Soil aggregates Co -occurrence network N addition
DOI10.1016/j.agee.2022.108249
通讯作者Shangguan, Zhouping(shangguan@ms.iswc.ac.cn)
英文摘要Nitrogen application in agroecosystem maintains and improves soil fertility while affecting organic carbon mineralization (Cmin). Soil aggregates play a crucial role in soil organic carbon (SOC) turnover. However, the cumulative Cmin and underlying microbial mechanisms responses to long-term N addition at aggregate scales remain unclear. Hence, a 16-year field N addition field experiment was conducted on winter wheat (Triticum aestivum L.) at three N levels: 0 (N0), 180 (N180), and 360 (N360) N ha-1. Overall, long-term N addition significantly altered the Cmin, bacterial and fungal community composition and bacterial and fungal cooccurrence patterns in four aggregate fractions (large macroaggregates, small macroaggregates, microaggregates, and silt-clay fractions). Specifically, N addition facilitated a more copiotrophic microbial community, with a significant increase in the relative abundances of Proteobacteria, Gemmatimonadota, and Ascomycota, and a significant decrease in the relative abundances of Actinomycetales, Acidimicrobiales, and Basidiomycota. The addition of N led to more complex and tight microbial networks with more nodes, higher average degrees, shorter average path lengths, and greater connectivity. These microbial changes accelerated Cmin in aggregates; however, the main microbial mechanisms varied with aggregate size and Cmin in silt-clay fractions was mainly influenced by microbial community composition. These results indicate that the spatial heterogeneity of resources available in different aggregate sizes is strongly selected for microbial life strategies and influences the distribution of microbial communities, thereby affecting the Cmin processes. Overall, our study provides a fundamental understanding of the microbial regulation of SOC turnover at an aggregate scale and highlights the importance of network topological patterns.
WOS关键词NITROGEN-FERTILIZATION ; NETWORK ANALYSIS ; SOIL ; BACTERIAL ; MATTER ; DIVERSITY ; RESPONSES ; SIZE
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; [XDA23070201] ; [42077452]
WOS研究方向Agriculture ; Environmental Sciences & Ecology
语种英语
出版者ELSEVIER
WOS记录号WOS:000882517900006
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/186984]  
专题中国科学院地理科学与资源研究所
通讯作者Shangguan, Zhouping
作者单位1.Chinese Acad Sci, Res Ctr Soil & Water Conservat & Ecol Environm, Yangling 712100, Shaanxi, Peoples R China
2.Minist Educ, Yangling 712100, Shaanxi, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Inst Soil & Water Conservat, Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yu,Shangguan, Zhouping. Long-term N addition accelerated organic carbon mineralization in aggregates by shifting microbial community composition[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2023,342:11.
APA Zhang, Yu,&Shangguan, Zhouping.(2023).Long-term N addition accelerated organic carbon mineralization in aggregates by shifting microbial community composition.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,342,11.
MLA Zhang, Yu,et al."Long-term N addition accelerated organic carbon mineralization in aggregates by shifting microbial community composition".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 342(2023):11.

入库方式： OAI收割

来源：地理科学与资源研究所

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