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Effects of grazing on the acquisition of nitrogen by plants and microorganisms in an alpine grassland on the Tibetan plateau
Jiang, LL (Jiang, Lili)1; Wang, SP (Wang, Shiping)1,3; Zhe, P (Zhe, Pang)10; Wang, CS (Wang, Changshun)8; Kardol, P (Kardol, Paul)6; Zhong, L (Zhong, Lei)5; Yu, Q (Yu, Qiang)7; Lan, ZC (Lan, Zhichun)9; Wang, YF (Wang, Yanfen)10; Xu, XL (Xu, Xingliang)4; Kuzyakov, Y (Kuzyakov, Yakov)4,11; Luo, CY (Luo, Caiyun)2; Zhang, ZH (Zhang, Zhenhua)2; Jones, D (Jones, Davey L.)12; Jiang, LL
Source PublicationPLANT AND SOIL
2017
Volume416Issue:1-2Pages:297-308
DOI10.1007/s11104-017-3205-1
AbstractNitrogen (N) limitation leads to intense competition between plants and soil microorganisms for available N. However, it is unclear how grazing affects the acquisition of N by plants and microorganisms.
We conducted short-term N-15 tracer experiments during the growing season (June, early growing season; July, mid-growing season; and September, late growing season) in an alpine grassland on the Tibetan Plateau to investigate the effects of grazing on the acquisition of NO3 (-)-N, NH4 (+)-N, and glycine-N by plants and soil microorganisms. Three dominant plant species (one graminoid, Kobresia pygmaea, and two forbs, Potentilla bifurca and Potentilla multifida) were selected for the study. As these species represented > 90% of the vegetation, the plant recovery of N-15 reflected competition at the plant community.
Grazing decreased the recovery of N-15 by soil microorganisms and plants by 46 and 69%, respectively, indicating that grazing strongly reduced the uptake of N-15 by plants and microorganisms and altered the partitioning of N-15 between them. Significant interactions were found between grazing, season and the different forms of N. In the absence of grazing, plants acquired relatively more N than soil microorganisms for the three forms of N in July and September, whereas the microorganisms obtained relatively more N-15 glycine in July and all three forms of N in September under grazing conditions. Under grazing, the plant root biomass played an important role in controlling plant-microbial N acquisition.
Grazing alters the partitioning of inorganic and organic N between plants and soil microorganisms by reducing microbial N-15 recovery to a lesser extent than plant N-15 recovery. This indicates that heterotrophic microorganisms play an important part in N cycling in N-limited ecosystems.
Subject Area普通生物学
WOS IDWOS:000405916400022
Language英语
Indexed BySCI
KeywordQinghai-xizang Plateau Organic-nitrogen Soil-microorganisms Inorganic Nitrogen Microbial Biomass Oxide Production Inner-mongolia Competition Meadow Carbon
WOS Research AreaAgriculture; Plant Sciences
WOS SubjectAgronomy; Plant Sciences; Soil Science
Cooperation Status国际
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8043
Collection图书馆
Corresponding AuthorJiang, LL
Affiliation1.Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China.
3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
4.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales.
5.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China.
6.Tianjin Univ, Sch Environm Sci & Engn, China Australia Ctr Sustainable Urban Dev, Tianjin 300072, Peoples R China.
7.Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden.
8.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China.
9.Hulunbuir Coll, Dept Sci Res Adm, Hulunbuir 021008, Inner Mongolia, Peoples R China.
10.Nanchang Univ, Inst Life Sci, Ctr Watershed Ecol, Nanchang 330031, Jiangxi, Peoples R China.
11.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China.
12.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, Gottingen, Germany.
Recommended Citation
GB/T 7714
Jiang, LL ,Wang, SP ,Zhe, P ,et al. Effects of grazing on the acquisition of nitrogen by plants and microorganisms in an alpine grassland on the Tibetan plateau[J]. PLANT AND SOIL,2017,416(1-2):297-308.
APA Jiang, LL .,Wang, SP .,Zhe, P .,Wang, CS .,Kardol, P .,...&Jiang, LL.(2017).Effects of grazing on the acquisition of nitrogen by plants and microorganisms in an alpine grassland on the Tibetan plateau.PLANT AND SOIL,416(1-2),297-308.
MLA Jiang, LL ,et al."Effects of grazing on the acquisition of nitrogen by plants and microorganisms in an alpine grassland on the Tibetan plateau".PLANT AND SOIL 416.1-2(2017):297-308.
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