Knowledge Management System of Northwest Institute of Plateau Biology, CAS
| Nutrient limitation of alpine plants: Implications from leaf N : P stoichiometry and leaf delta N-15 | |
| Xu, Xingliang1; Wanek, Wolfgang2; Zhou, Caiping1; Richter, Andreas2; Song, Minghua1; Cao, Guangmin3; Ouyang, Hua1; Kuzyakov, Yakov1,4,5 | |
| 2014-06-01 | |
| 发表期刊 | JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
 |
| ISSN | 1436-8730 |
| 卷号 | 177期号:3页码:378-387 |
| 文章类型 | Article |
| 摘要 | Nitrogen (N) deposition can affect grassland ecosystems by altering biomass production, plant species composition and abundance. Therefore, a better understanding of the response of dominant plant species to N input is a prerequisite for accurate prediction of future changes and interactions within plant communities. We evaluated the response of seven dominant plant species on the Tibetan Plateau to N input at two levels: individual species and plant functional group. This was achieved by assessing leaf N : P stoichiometry, leaf delta N-15 and biomass production for the plant functional groups. Seven dominant plant species-three legumes, two forbs, one grass, one sedge-were analyzed for N, P, and delta N-15 2 years after fertilization with one of the three N forms: NO3-, NH4+, or NH4NO3 at four application rates (0, 7.5, 30, and 150 kg N ha(-1) y(-1)). On the basis of biomass production and leaf N : P ratios, we concluded that grasses were limited by available N or co-limited by available P. Unlike for grasses, leaf N : P and biomass production were not suitable indicators of N limitation for legumes and forbs in alpine meadows. The poor performance of legumes under high N fertilization was mainly due to strong competition with grasses. The total above-ground biomass was not increased by N fertilization. However, species composition shifted to more productive grasses. A significant negative correlation between leaf N : P and leaf delta N-15 indicated that the two forbs Gentiana straminea and Saussurea superba switched from N deficiency to P limitation (e. g., N excess) due to N fertilization. These findings imply that alpine meadows will be more dominated by grasses under increased atmospheric N deposition.; Nitrogen (N) deposition can affect grassland ecosystems by altering biomass production, plant species composition and abundance. Therefore, a better understanding of the response of dominant plant species to N input is a prerequisite for accurate prediction of future changes and interactions within plant communities. We evaluated the response of seven dominant plant species on the Tibetan Plateau to N input at two levels: individual species and plant functional group. This was achieved by assessing leaf N : P stoichiometry, leaf delta N-15 and biomass production for the plant functional groups. Seven dominant plant species-three legumes, two forbs, one grass, one sedge-were analyzed for N, P, and delta N-15 2 years after fertilization with one of the three N forms: NO3-, NH4+, or NH4NO3 at four application rates (0, 7.5, 30, and 150 kg N ha(-1) y(-1)). On the basis of biomass production and leaf N : P ratios, we concluded that grasses were limited by available N or co-limited by available P. Unlike for grasses, leaf N : P and biomass production were not suitable indicators of N limitation for legumes and forbs in alpine meadows. The poor performance of legumes under high N fertilization was mainly due to strong competition with grasses. The total above-ground biomass was not increased by N fertilization. However, species composition shifted to more productive grasses. A significant negative correlation between leaf N : P and leaf delta N-15 indicated that the two forbs Gentiana straminea and Saussurea superba switched from N deficiency to P limitation (e. g., N excess) due to N fertilization. These findings imply that alpine meadows will be more dominated by grasses under increased atmospheric N deposition. |
| 关键词 | Ammonium Plant Functional Groups Nitrate Nitrogen Cycling Alpine Meadow |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 关键词[WOS] | PHOSPHORUS LIMITATION ; TERRESTRIAL ECOSYSTEMS ; ORGANIC NITROGEN ; MEADOW ; AMMONIUM ; NITRATE ; N-15 ; NUTRITION ; PATTERNS ; PLATEAU |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Agriculture ; Plant Sciences |
| WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
| WOS记录号 | WOS:000337506600008 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.75.249.4/handle/363003/4225 |
| 专题 | 中国科学院西北高原生物研究所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Vienna, Dept Microbiol & Ecosyst Sci, A-1090 Vienna, Austria 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810008, Peoples R China 4.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, D-37077 Gottingen, Germany 5.Univ Gottingen, Dept Agr Soil Sci, D-37077 Gottingen, Germany |
| 推荐引用方式 GB/T 7714 | Xu, Xingliang,Wanek, Wolfgang,Zhou, Caiping,et al. Nutrient limitation of alpine plants: Implications from leaf N : P stoichiometry and leaf delta N-15[J]. JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE,2014,177(3):378-387. |
| APA | Xu, Xingliang.,Wanek, Wolfgang.,Zhou, Caiping.,Richter, Andreas.,Song, Minghua.,...&Kuzyakov, Yakov.(2014).Nutrient limitation of alpine plants: Implications from leaf N : P stoichiometry and leaf delta N-15.JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE,177(3),378-387. |
| MLA | Xu, Xingliang,et al."Nutrient limitation of alpine plants: Implications from leaf N : P stoichiometry and leaf delta N-15".JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE 177.3(2014):378-387. |
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