Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland

doi:10.1016/j.soilbio.2020.107922

	Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland
	Chen, Wenjing 1; Zhou, Huakun 2,3; Wu, Yang 1; Wang, Jie 1; Zhao, Ziwen 4,5; Li, Yuanze 1; Qiao, Leilei 1; Chen, Kelu 2,5; Liu, Guobin 1,4; Xue, Sha 1,3,4
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2020-10-01
卷号	149 页码:13
关键词	C and N cycling Microbial community N fertilization Qinghai-tibet plateau Stoichiometric homeostasis
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2020.107922
通讯作者	Xue, Sha(xuesha100@163.com)
英文摘要	Beginning in the twentieth century, atmospheric deposition of N and P greatly increased in terrestrial ecosystems, including alpine grasslands. These inputs have profoundly affected soil microbial C and N cycles. Changes in the microbial environment are directly caused by changes in soil N and P availability and also indirectly through changes in vegetation in response to increased fertilization. The mechanisms involved in both the direct and indirect changes are not mutually exclusive and are poorly understood. Therefore, we investigated the responses of vegetation and soil microbes to a 9-year fertilization (N and P) experiment in an alpine grassland in the Qinghai-Tibetan Plateau in China. We found that N addition altered soil microbial community composition and processes regardless of P addition. To maintain stoichiometric homeostasis, soil microbes adjusted metabolic processes in response to changes in nutrient availability. High N availability enhanced microbial investment in C acquisition as indicated by beta-1,4-Glucosidase activity. The abundance of microbial taxa that degrade labile C also increased. High N inputs also induced a proliferation of denitrifiers and increased the gaseous N loss potential. Partial least squares path modelling indicated that soil parameters (e.g., soil organic C and total N) and changes in the plant community played a key role in shaping soil microbial community structure and C and N cycling. Our results suggest that vegetation and stoichiometric differences between resource availability and soil microbial nutrient requirements collectively regulate the responses of soil microbial processes to N enrichment, which provides novel experimental insights into the mechanisms underlying the effects of nutrient inputs on microbial C and N cycles. Ultimately, our findings highlight the importance of plant traits in regulating microbial nutrient cycles, further promoting our comprehension about the mechanism of variation in the microbial nutrient cycles in an alpine grassland soils.
资助项目	National Science Foundation of China[31672475] ; National Science Foundation of China[41771557] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302] ; Qinghai Provincial Key Laboratory of Restoration Ecology in Cold Regions, Northwest Institute of Plateau Biology[2020-KF-04]
WOS关键词	SOIL BACTERIAL COMMUNITIES ; PLANT FUNCTIONAL TRAITS ; STOICHIOMETRIC CONTROLS ; PHOSPHORUS ADDITION ; ENZYME-ACTIVITY ; DIFFERENTIAL RESPONSES ; ECOSYSTEM RESPIRATION ; FUNGAL COMMUNITY ; SPECIES IDENTITY ; DIVERSITY
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000567094800009
资助机构	National Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Qinghai Provincial Key Laboratory of Restoration Ecology in Cold Regions, Northwest Institute of Plateau Biology
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156839]
专题	中国科学院地理科学与资源研究所
通讯作者	Xue, Sha
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Prov Key Lab Restorat Ecol Cold Reg, Xining 810000, Peoples R China 3.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810000, Peoples R China 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Wenjing,Zhou, Huakun,Wu, Yang,et al. Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland[J]. SOIL BIOLOGY & BIOCHEMISTRY,2020,149:13.
APA	Chen, Wenjing.,Zhou, Huakun.,Wu, Yang.,Wang, Jie.,Zhao, Ziwen.,...&Xue, Sha.(2020).Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland.SOIL BIOLOGY & BIOCHEMISTRY,149,13.
MLA	Chen, Wenjing,et al."Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland".SOIL BIOLOGY & BIOCHEMISTRY 149(2020):13.