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The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization
Li, Zhaolei1; Zeng, Zhaoqi2; Tian, Dashuan; Wang, Jinsong; Fu, Zheng; Wang, Bingxue; Tang, Ze2; Chen, Weinan2; Chen, Han Y. H.; Wang, Changhui4; Yi, Chuixiang5; Niu, Shuli2
AbstractSoil nitrogen (N) mineralization is crucial for the sustainability of available soil N and hence ecosystem productivity and functioning. Metabolic quotient of N mineralization (Q(min)), which is defined as net soil N mineralization per unit of soil microbial biomass N, reflects the efficiency of soil N mineralization. However, it is far from clear how soil Q(min) changes and what are the controlling factors at the global scale. We compiled 871 observations of soil Q(min) from 79 published articles across terrestrial ecosystems (croplands, forests, grasslands, and wetlands) to elucidate the global variation of soil Q(min) and its predictors. Soil Q(min) decreased from the equator to two poles, which was significant in the North Hemisphere. Soil Q(min) correlated negatively with soil pH, total soil N, the ratio of soil carbon (C) to N, and soil microbial biomass C, and positively with mean annual temperature and C:N ratio of soil microbial biomass at a global scale. Soil microbial biomass, climate, and soil physical and chemical properties in combination accounted for 41% of the total variations of global soil Q(min). Among those predictors, C:N ratio of soil microbial biomass was the most important factor contributing to the variations of soil Q(min) (the standardized coefficient = 0.39) within or across ecosystem types. This study emphasizes the critical role of microbial stoichiometry in soil N cycling, and suggests the necessity of incorporating soil Q(min) into Earth system models to better predict N cycling under environmental change.
Keyworddominant driver global warming metabolic quotient natural ecosystems nitrogen cycling stoichiometry of microbial biomass
Subject AreaEnvironmental Sciences ; Meteorology & Atmospheric Sciences
Indexed BySCI
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS IDWOS:000537405400003
Publication PlaceBRISTOL
Funding OrganizationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31988102, 31625006] ; CAS international collaboration program [131A11KYSB20180010] ; Postdoctoral Science Foundation of ChinaChina Postdoctoral Science Foundation [2018M641459]
Corresponding Author Emailsniu@igsnrr.ac.cn
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Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Shandong Agr Univ, Coll Resources & Environm, Key Lab Agr Environm Univ Shandong, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Tai An 271018, Shandong, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
4.Chen, Han Y. H.] Lakehead Univ, Fac Nat Resources Management, 955 Oliver Rd, Thunder Bay, ON P7B 5E1, Canada
5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
6.CUNY Queens Coll, Sch Earth & Environm Sci, Flushing, NY 11367 USA
Recommended Citation
GB/T 7714
Li, Zhaolei,Zeng, Zhaoqi,Tian, Dashuan,et al. The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(3).
APA Li, Zhaolei.,Zeng, Zhaoqi.,Tian, Dashuan.,Wang, Jinsong.,Fu, Zheng.,...&Niu, Shuli.(2020).The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization.ENVIRONMENTAL RESEARCH LETTERS,15(3).
MLA Li, Zhaolei,et al."The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization".ENVIRONMENTAL RESEARCH LETTERS 15.3(2020).
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