Effects of grazing on the acquisition of nitrogen by plants and microorganisms in an alpine grassland on the Tibetan plateau
文献类型：期刊论文
| 作者 | Jiang, LL (Jiang, Lili)2; Wang, SP (Wang, Shiping)2,4; Zhe, P (Zhe, Pang)11; Wang, CS (Wang, Changshun)9; Kardol, P (Kardol, Paul)7; Zhong, L (Zhong, Lei)6; Yu, Q (Yu, Qiang)8; Lan, ZC (Lan, Zhichun)10; Wang, YF (Wang, Yanfen)11; Xu, XL (Xu, Xingliang)5 |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2017 |
| 卷号 | 416期号:1-2页码:297-308 |
| 关键词 | Qinghai-xizang Plateau Organic-nitrogen Soil-microorganisms Inorganic Nitrogen Microbial Biomass Oxide Production Inner-mongolia Competition Meadow Carbon |
| DOI | 10.1007/s11104-017-3205-1 |
| 文献子类 | Article |
| 英文摘要 | Nitrogen (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. |
| 学科主题 | 普通生物学 |
| WOS研究方向 | Agriculture; Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000405916400022 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8043]  |
| 专题 | 青藏高原研究所_图书馆 |
| 通讯作者 | Jiang, LL |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China. 2.Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China. 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China. 4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China. 5.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales. 6.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China. 7.Tianjin Univ, Sch Environm Sci & Engn, China Australia Ctr Sustainable Urban Dev, Tianjin 300072, Peoples R China. 8.Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden. 9.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China. 10.Hulunbuir Coll, Dept Sci Res Adm, Hulunbuir 021008, Inner Mongolia, Peoples R China. |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：青藏高原研究所
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