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Ecoenzymatic stoichiometry and microbial nutrient limitation in rhizosphere soil in the arid area of the northern Loess Plateau, China
Cui, Yongxing1,2; Fang, Linchuan1; Guo, Xiaobin3; Wang, Xia1,2; Zhang, Yanjiang4; Li, Pengfei1,2; Zhang, Xingchang1; Fang, LC; 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.
SubtypeArticle
2018
Source PublicationSOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
description.correspondentemailflinc629@hotmail.com ; zhangxc@ms.iswc.ac.cn
Volume116Pages:11-21
AbstractArid 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.
KeywordRhizosphere Ecoenzymatic Stoichiometry Microbial Metabolism Threshold Elemental Ratio Loess Plateau
Subject AreaSoil Science
DOI10.1016/j.soilbio.2017.09.025
Indexed BySCI
Publication PlaceTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language英语
WOS IDWOS:000419417900003
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/7862
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorFang, LC; 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.
Affiliation1.Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
3.Govt Newfoundland & Labrador, Dept Fisheries Forestry & Agrifoods, Agr Prod & Res, St John, NF, Canada
4.Northwest A&F Univ, Coll Resource & Environm, Yangling 712100, Peoples R China
Recommended Citation
GB/T 7714
Cui, Yongxing,Fang, Linchuan,Guo, Xiaobin,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.,Fang, Linchuan.,Guo, Xiaobin.,Wang, Xia.,Zhang, Yanjiang.,...&Zhang, XC .(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.
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