Ecoenzymatic stoichiometry and microbial nutrient limitation in rhizosphere soil in the arid area of the northern Loess Plateau, China

doi:10.1016/j.soilbio.2017.09.025

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	Ecoenzymatic stoichiometry and microbial nutrient limitation in rhizosphere soil in the arid area of the northern Loess Plateau, China
	Cui, Yongxing 3,4; Zhang, XC (reprint author), Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China.; Fang, Linchuan 3; Zhang, Yanjiang 2; Guo, Xiaobin 1; Li, Pengfei 3,4; Zhang, Xingchang 3; Fang, LC ; Wang, Xia 3,4
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2018
卷号	116 页码:11-21
关键词	Rhizosphere Ecoenzymatic Stoichiometry Microbial Metabolism Threshold Elemental Ratio Loess Plateau
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2017.09.025
文献子类	Article
英文摘要	Arid ecosystems are characterized as having stressful conditions of low energy and nutrient availability for soil microorganisms and vegetation. The rhizosphere serves as the one of most active microorganism habitats, however, the general understanding of the ecoenzymatic stoichiometry (exoenzymes) and microbial nutrient acquisition in rhizosphere soil is limited. Here, we investigated the vegetation communities and determined the soil physicochemical properties, microbial biomass, and enzymatic activities in rhizosphere under different vegetation and soil types in the arid area of the northern Loess Plateau. Type II standard major axis (SMA) regression analysis showed that the plants played a more important role than soil properties in determining ecoenzymatic stoichiometry. Linear regression analysis displayed a microbial stoichiometric homeostasis (community-level) in rhizosphere. The Threshold Elemental Ratio (TER) revealed that the microbial nutrient metabolisms of rhizosphere were co-limited by N and P in the A. ordosica and A. cristatum communities of loess, and A. cristatum communities of feldspathic sandstone weathered soil. Binding spatial ordination analysis (RDA and CCA) demonstrated that soil physical properties (e.g., soil moisture, silt and clay contents) have more contribution to ecoenzymatic stoichiometry than the other investigated soil parameters, whereas soil nutrients (e.g., total organic carbon, nitrogen, and phosphorus) predominantly controlled microbial nutrient ratios. Therefore, the ecoenzymatic stoichiometry in rhizosphere is greatly regulated by plants and soil physical properties. The microbial N and P are co-limited under Gramineae plant in loess and feldspathic sandstone weathered soil regions. Meanwhile, the microbial nutrient limitation is mainly affected by soil nutrient supply. These findings could be crucial for illuminating rhizosphere microbial metabolism and revealing the nutrient cycling of root-soil interface under arid and oligotrophic ecosystems.
学科主题	Soil Science
出版地	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000419417900003
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7862]
专题	水保所科研产出--SCI_2018--SCI
通讯作者	Zhang, XC (reprint author), Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China.; Fang, LC
作者单位	1.Govt Newfoundland & Labrador, Dept Fisheries Forestry & Agrifoods, Agr Prod & Res, St John, NF, Canada 2.Northwest A&F Univ, Coll Resource & Environm, Yangling 712100, Peoples R China 3.Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
推荐引用方式 GB/T 7714	Cui, Yongxing,Zhang, XC ,Fang, Linchuan,et al. Ecoenzymatic stoichiometry and microbial nutrient limitation in rhizosphere soil in the arid area of the northern Loess Plateau, China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,116:11-21.
APA	Cui, Yongxing.,Zhang, XC .,Fang, Linchuan.,Zhang, Yanjiang.,Guo, Xiaobin.,...&Wang, Xia.(2018).Ecoenzymatic stoichiometry and microbial nutrient limitation in rhizosphere soil in the arid area of the northern Loess Plateau, China.SOIL BIOLOGY & BIOCHEMISTRY,116,11-21.
MLA	Cui, Yongxing,et al."Ecoenzymatic stoichiometry and microbial nutrient limitation in rhizosphere soil in the arid area of the northern Loess Plateau, China".SOIL BIOLOGY & BIOCHEMISTRY 116(2018):11-21.