Nitrogen addition stimulated compensatory growth responses to clipping defoliation in a Northern Tibetan alpine meadow
文献类型：期刊论文
| 作者 | Zong, Ning1; Shi, Peili1,2
|
| 刊名 | GRASSLAND SCIENCE
 |
| 出版日期 | 2019 |
| 卷号 | 65期号:1页码:60-68 |
| ISSN号 | 1744-6961 |
| 关键词 | clipping defoliation compensatory growth nitrogen addition plant production relative growth rate |
| DOI | 10.1111/grs.12219 |
| 通讯作者 | Zong, Ning(zongning@igsnrr.ac.cn) |
| 英文摘要 | Grazing and clipping defoliation are the most important human disturbances in natural grasslands. Compensatory growth is a common response to clipping defoliation, which is of great significance for forage production and livestock husbandry development. However, how clipping intensity affects plant compensatory growth and how nitrogen (N) addition regulates this response in alpine ecosystems are still unclear. A manipulative experiment including two clipping intensities (light and heavy) crossed with N addition was conducted in an alpine meadow ecosystem to examine the effects of how N addition regulated plant compensatory growth induced by clipping defoliation. Selective clipping was used to simulate animal feeding, that is, only grasses and sedges were clipped. Under the N addition treatment, the relative growth rate of grasses and total biomass after clipping were significantly higher than those under the no N addition treatment. The total community biomass showed over-compensatory growth in light clipping under N addition treatment, while it showed equal-compensatory growth under the other treatments. The over-compensatory growth in light clipping under the N addition treatments mainly resulted from the stimulated growth of grasses. Regression analysis showed that the relative growth rate and biomass of grasses were positively correlated with soil inorganic N content, but increasing N availability was not conducive to the growth of sedges and other forbs. Divergent responses of different plant functional groups to clipping and N addition would lead to changes in community structure and functioning. Both community biomass and compensatory growth tended to increase first and then reach a stable state with the increase in soil N availability. Our results show that although light clipping could largely stimulate forage production under N addition, excessive clipping cannot lead to a continuous increase in compensatory growth of plant biomass, even under N addition conditions, in this semiarid alpine meadow ecosystem. |
| WOS关键词 | BELOW-GROUND BIOMASS ; CRITICAL LOADS ; SOIL-NITROGEN ; PLANT-PRODUCTION ; ECOSYSTEM ; GRASSLAND ; BIODIVERSITY ; RESPIRATION ; VEGETATION ; STEPPE |
| 资助项目 | Youth Innovation Research Team Project[LENOM2016Q0004] ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China[41703079] ; National Key Research and Development Program[2016YFC0501803] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:000454610400007 |
| 资助机构 | Youth Innovation Research Team Project ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Key Research and Development Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/51299]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zong, Ning |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Lhasa Natl Ecol Res Stn, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zong, Ning,Shi, Peili. Nitrogen addition stimulated compensatory growth responses to clipping defoliation in a Northern Tibetan alpine meadow[J]. GRASSLAND SCIENCE,2019,65(1):60-68. |
| APA | Zong, Ning,&Shi, Peili.(2019).Nitrogen addition stimulated compensatory growth responses to clipping defoliation in a Northern Tibetan alpine meadow.GRASSLAND SCIENCE,65(1),60-68. |
| MLA | Zong, Ning,et al."Nitrogen addition stimulated compensatory growth responses to clipping defoliation in a Northern Tibetan alpine meadow".GRASSLAND SCIENCE 65.1(2019):60-68. |
入库方式： OAI收割
来源：地理科学与资源研究所
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