The uptake diversity of soil nitrogen nutrients by main plant species in Kobresia humilis alpine meadow on the Qinghai-Tibet Plateau
文献类型：期刊论文
| 作者 | Wang WenYing1; Ma YongGui1; Xu Jin3; Wang HuiChun1; Zhu JinFu1; Zhou HuaKun2 |
| 刊名 | science china-earth sciences
 |
| 出版日期 | 2012-10-01 |
| 卷号 | 55期号:10页码:1688-1695 |
| 关键词 | Kobresia humilis alpine meadow N-15 tracer technique plant organic nutrition soil nitrogen |
| ISSN号 | 1674-7313 |
| 中文摘要 | we studied the uptake of ammonium, nitrate, and a variety of amino acids by alpine plant species in the kobresia humilis alpine meadow ecosystem in situ. we examined the extent of niche separation in uptake of n source by different plant species in alpine communities, and investigated the contribution of symbiotically fixed n to the total n in alpine meadow. the results are (1) delta n-15 natural abundance values of 13 plant species lie between -2.680aeuro degrees and 5.169aeuro degrees, and the scope is 7.849aeuro degrees. (2) leguminous plants, such as trigonella ruthenica, gueldenstaedtia diversiffolia, and oxytyopis ochrocephala, and non-leguminous plant gentiana straminea uptake low amounts of n-15 labeled ammonium, nitrate, glycine or aspartate in soil. (3) as far as the plant uptake of organic n is concerned, kobresia humilis, poa pratensis, and gentiuna spathutifolta can effectively uptake organic nitrogen, and about 37%-40% of the nitrogen of these species comes from soil organic nitrogen sources (such as glycine and aspartate). stipa aliena can effectively uptake nitrate, and 60% of its nitrogen comes from soil nitrate. potentilla anserina, poa pratensis, and thalictrum alpinum can effectively absorb ammonium in comparason to other plant species in the meadow, and about 25%-27% of the nitrogen in these plants comes from soil ammonium. (4) the contribution of leguminous fixed n to total n is 7.48%-9.26% in kobresia humilis alpine meadow. (5) these data show many plant species of alpine meadow may effectively utilize dissolved organic nitrogen such as amino acids, and these plants have diverse ways to uptake soil nitrogen in alpine meadows. based on the results we can partly explain why there are abundant biodiversities and how plants at alpine habitat utilize the limited soil n sources. |
| 英文摘要 | we studied the uptake of ammonium, nitrate, and a variety of amino acids by alpine plant species in the kobresia humilis alpine meadow ecosystem in situ. we examined the extent of niche separation in uptake of n source by different plant species in alpine communities, and investigated the contribution of symbiotically fixed n to the total n in alpine meadow. the results are (1) delta n-15 natural abundance values of 13 plant species lie between -2.680aeuro degrees and 5.169aeuro degrees, and the scope is 7.849aeuro degrees. (2) leguminous plants, such as trigonella ruthenica, gueldenstaedtia diversiffolia, and oxytyopis ochrocephala, and non-leguminous plant gentiana straminea uptake low amounts of n-15 labeled ammonium, nitrate, glycine or aspartate in soil. (3) as far as the plant uptake of organic n is concerned, kobresia humilis, poa pratensis, and gentiuna spathutifolta can effectively uptake organic nitrogen, and about 37%-40% of the nitrogen of these species comes from soil organic nitrogen sources (such as glycine and aspartate). stipa aliena can effectively uptake nitrate, and 60% of its nitrogen comes from soil nitrate. potentilla anserina, poa pratensis, and thalictrum alpinum can effectively absorb ammonium in comparason to other plant species in the meadow, and about 25%-27% of the nitrogen in these plants comes from soil ammonium. (4) the contribution of leguminous fixed n to total n is 7.48%-9.26% in kobresia humilis alpine meadow. (5) these data show many plant species of alpine meadow may effectively utilize dissolved organic nitrogen such as amino acids, and these plants have diverse ways to uptake soil nitrogen in alpine meadows. based on the results we can partly explain why there are abundant biodiversities and how plants at alpine habitat utilize the limited soil n sources. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | geosciences, multidisciplinary |
| 研究领域[WOS] | geology |
| 关键词[WOS] | dissolved organic nitrogen ; boreal forest plants ; amino-acid-uptake ; tundra ; mineralization ; ecosystems ; microbes ; carbon ; sedge |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000309468700011 |
| 公开日期 | 2013-03-15 |
| 源URL | [http://ir.nwipb.ac.cn/handle/363003/3604]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 作者单位 | 1.Qinghai Normal Univ, Dept Life & Geog Sci, Xining 810008, Peoples R China 2.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China 3.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Shijiazhuang 050021, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang WenYing,Ma YongGui,Xu Jin,et al. The uptake diversity of soil nitrogen nutrients by main plant species in Kobresia humilis alpine meadow on the Qinghai-Tibet Plateau[J]. science china-earth sciences,2012,55(10):1688-1695. |
| APA | Wang WenYing,Ma YongGui,Xu Jin,Wang HuiChun,Zhu JinFu,&Zhou HuaKun.(2012).The uptake diversity of soil nitrogen nutrients by main plant species in Kobresia humilis alpine meadow on the Qinghai-Tibet Plateau.science china-earth sciences,55(10),1688-1695. |
| MLA | Wang WenYing,et al."The uptake diversity of soil nitrogen nutrients by main plant species in Kobresia humilis alpine meadow on the Qinghai-Tibet Plateau".science china-earth sciences 55.10(2012):1688-1695. |
入库方式： OAI收割
来源：西北高原生物研究所
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