Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands

doi:10.1016/j.ejsobi.2017.09.007

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands
	Zhao, Huan 1,2; Sun, Jian 2; Xu, Xingliang 2; Qin, Xiaojing 3
刊名	EUROPEAN JOURNAL OF SOIL BIOLOGY
	2017-11-01
卷号	83 页码:1-8
关键词	Microbial Biomass Carbon Microbial Biomass Nitrogen Climatic Factors Edaphic Factors Alpine Grasslands Temperate Grasslands
ISSN号	1164-5563
DOI	10.1016/j.ejsobi.2017.09.007
通讯作者	Jian Sun b, *
英文摘要	Soil microorganisms play a key role in terrestrial ecological processes, especially in soil organic matter (SOM) formation and nutrient recycling. To perform these essential functions, microbes require mineral nutrients and labile C from the soil solution in amounts that roughly follow the Redfield ratio. However, it remains unclear how soil microorganisms maintain their C:N stoichiometry in grassland ecosystems. Here, we explored the patterns of microbial biomass C (MBC) and N (MBN), along with their controlling factors, using published data on alpine and temperate grasslands across northwestern China (from Inner Mongolia to Tibet). We tested the hypothesis that soil microbial biomass is more sensitive to climate factors than to edaphic factors. The results showed that MBC (670.0 mg kg(-1)), MBN (78.5 mg kg(-1)), and the ratio of MBC to MBN (10.9:1) in alpine grasslands were greater than in temperate grasslands (MBC = 317.4 mg kg(-1), MBN = 59.9 mg kg(-1), MBC:MBN = 6.2:1). Soil MBC in temperate grasslands had a stronger relationship with MBN (y = 0.83x - 0.33, r(2) = 0.53, p < 0.01) than in alpine grasslands (y = 0.62x + 0.09, r(2) = 0.29, p < 0.01). Climate factors were more sensitive than edaphic factors for MBC and MBN in both grasslands, but climate factors explained only 26% of the variation. These findings demonstrate that climate generally affects microbial C:N stoichiometry more strongly than do edaphic factors in alpine and temperate grasslands. However, some biotic factors could be more influential than climatic factors, necessitating further investigation. (C) 2017 Elsevier Masson SAS. All rights reserved.
语种	英语
WOS记录号	WOS:000418988200001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/20813]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chengdu Univ Technol, Chengdu 610000, Sichuan, Peoples R China 2.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610000, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Huan,Sun, Jian,Xu, Xingliang,et al. Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2017,83:1-8.
APA	Zhao, Huan,Sun, Jian,Xu, Xingliang,&Qin, Xiaojing.(2017).Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands.EUROPEAN JOURNAL OF SOIL BIOLOGY,83,1-8.
MLA	Zhao, Huan,et al."Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands".EUROPEAN JOURNAL OF SOIL BIOLOGY 83(2017):1-8.