Enhanced Community Production rather than Structure Improvement under Nitrogen and Phosphorus Addition in Severely Degraded Alpine Meadows
文献类型：期刊论文
| 作者 | Zong, Ning1; Shi, Peili1,2
|
| 刊名 | SUSTAINABILITY
 |
| 出版日期 | 2019-04-01 |
| 卷号 | 11期号:7页码:14 |
| 关键词 | community structure nitrogen and phosphorus fertilization plant production severely degraded alpine meadow ecosystem temporal stability Tibetan Plateau |
| ISSN号 | 2071-1050 |
| DOI | 10.3390/su11072023 |
| 通讯作者 | Zong, Ning(zongning@igsnrr.ac.cn) |
| 英文摘要 | Fertilization is a common management measure for the restoration of degraded grasslands. In order to investigate whether fertilization can improve the severely degraded alpine meadows, we conducted a fertilization experiment on the Tibetan Plateau that began in 2008. The treatments were nitrogen (N) addition alone (50 kg N ha(-1) year(-1), LN; 100 kg N ha(-1) year(-1), HN) or combined with phosphorus (P) fertilizer [(50 kg N + 50 kg P) ha(-1) year(-1), LN+P; (100 kg N + 50 kg P) ha(-1) year(-1), HN + P] in a severely degraded alpine meadow. Eleven consecutive years of N and P fertilization did not significantly change plant species richness, while fertilization reduced the plant species diversity index, with the most significant reduction in HN and HN + P treatments. LN + P and HN + P treatments greatly increased community coverage and aboveground biomass, while N addition alone, especially the HN treatment, significantly reduced community coverage and aboveground biomass. Fertilization had no effect on edible pastures, while N and P fertilization significantly increased the biomass of forbs. The proportion of forbs to total aboveground biomass was more than 90%, and fertilization had no effect on this proportion. This shows that forbs still have an absolute advantage in the community. In addition, HN, LN + P, and HN + P treatments significantly reduced ecosystem stability. Community aboveground biomass was greatly enhanced in the N and P fertilization treatments, and this was beneficial for the ecosystem quality and soil hydrological functioning. However, fertilization treatments did not improve the community structure with either N addition alone or combined with P fertilizer, which was of little significance in providing forages for the sustainable development of livestock husbandry. To improve the structure of severely degraded alpine grasslands, it is necessary to combine other measures such as cutting the roots of forbs, fencing, or reseeding. |
| WOS关键词 | QINGHAI-TIBETAN PLATEAU ; GRASSLAND ECOSYSTEM ; GRAZING EXCLUSION ; PLANT DIVERSITY ; NORTHERN TIBET ; CRITICAL LOADS ; CLIMATE-CHANGE ; SOIL-NITROGEN ; RESPONSES ; DEPOSITION |
| 资助项目 | National Science Foundation of China[41703079] ; National Science Foundation of China[31870406] ; West Light Foundation of the Chinese Academy of Sciences ; National Key Research and Development Program[2016YFC0501803] ; National Key Research and Development Program[2017YFA0604802] |
| WOS研究方向 | Science & Technology - Other Topics ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000466551600200 |
| 出版者 | MDPI |
| 资助机构 | National Science Foundation of China ; West Light Foundation of the Chinese Academy of Sciences ; National Key Research and Development Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/59357]  |
| 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 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zong, Ning,Shi, Peili. Enhanced Community Production rather than Structure Improvement under Nitrogen and Phosphorus Addition in Severely Degraded Alpine Meadows[J]. SUSTAINABILITY,2019,11(7):14. |
| APA | Zong, Ning,&Shi, Peili.(2019).Enhanced Community Production rather than Structure Improvement under Nitrogen and Phosphorus Addition in Severely Degraded Alpine Meadows.SUSTAINABILITY,11(7),14. |
| MLA | Zong, Ning,et al."Enhanced Community Production rather than Structure Improvement under Nitrogen and Phosphorus Addition in Severely Degraded Alpine Meadows".SUSTAINABILITY 11.7(2019):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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