The uptake diversity of soil nitrogen nutrients by main plant species in Kobresia humilis alpine meadow on the Qinghai-Tibet Plateau

NWIPB OpenIR

	The uptake diversity of soil nitrogen nutrients by main plant species in Kobresia humilis alpine meadow on the Qinghai-Tibet Plateau
	Wang WenYing ; Ma YongGui ; Xu Jin ; Wang HuiChun ; Zhu JinFu ; Zhou HuaKun
	2012-10-01
发表期刊	SCIENCE CHINA-EARTH SCIENCES ; Ning, SJ; You, JM; Sun, ZW; Zhang, SJ; Ji, ZY.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,2012,55(10):1688-1695
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.; 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.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/41945
专题	中国科学院西北高原生物研究所
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, Ning, SJ; You, JM; Sun, ZW; Zhang, SJ; Ji, ZY.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,2012,55(10):1688-1695,2012.
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.
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 (2012).