Nitrogen deposition magnifies the positive response of plant community production to precipitation: Ammonium to nitrate ratio matters
文献类型：期刊论文
| 作者 | Ren, Zhengru1; Zhang, Yuqiu1; Zhang, Yunhai1
|
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2021 |
| 卷号 | 276 |
| 关键词 | Aboveground net primary productivity (ANPP) Atmospheric nitrogen deposition NH4+-N/NO3--N ratios Nitrogen forms Steppe |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2021.116659 |
| 文献子类 | Article |
| 英文摘要 | The impacts of atmospheric nitrogen (N) deposition amount on plant communities have been extensively explored. However, the responses of plant communities to the ratio of reduced (NH4+-N) and oxidized (NO3--N) forms remain unclear in natural ecosystems. A field N enrichment experiment using different NH4+-N/NO3--N ratios was conducted in a natural semi-arid grassland in northern China from 2014 to 2019. Nitrogen addition tended to reduce plant species richness and significantly enhanced plant community aboveground net primary productivity (ANPP). Neither plant species richness nor plant ANPP at species and community levels was significantly affected by NH4+-N/NO3--N ratios. At the plant functional group level, ANPP of grasses was not significantly affected by the NH4+-N/NO3--N ratios examined, whereas ANPP of forbs was significantly increased at 1:1 NH4+-N/NO3--N. Regardless of N supplied using the different ratios of NH4+-N/NO3--N examined, plant community ANPP was positively associated with growing season precipitation. Unexpectedly, 1:1 NH4+-N/NO3--N (NH4NO3) significantly improved the positive response of plant community ANPP to precipitation (it had the biggest slope value). Our results suggest that precipitation was the main determinant of the influence of NH4+-N/NO3--N ratios on plant community ANPP. Therefore, the results of our study showed that without referring to NH4+-N/NO3--N ratios and precipitation, models using NH4NO3 enrichment may overestimate the positive effect of atmospheric N deposition on ecosystem ANPP in semi-arid ecozones. (C) 2021 Elsevier Ltd. All rights reserved. |
| 学科主题 | Environmental Sciences |
| 出版地 | OXFORD |
| 电子版国际标准刊号 | 1873-6424 |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000630774100014 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Key Research Program of Frontier Sciences, Chinese Academy of Sciences [ZDBS-LY-DQC034] ; National Natural Science Foundation of China [32071603] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/26630]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ren, Zhengru,Zhang, Yuqiu,Zhang, Yunhai. Nitrogen deposition magnifies the positive response of plant community production to precipitation: Ammonium to nitrate ratio matters[J]. ENVIRONMENTAL POLLUTION,2021,276. |
| APA | Ren, Zhengru,Zhang, Yuqiu,&Zhang, Yunhai.(2021).Nitrogen deposition magnifies the positive response of plant community production to precipitation: Ammonium to nitrate ratio matters.ENVIRONMENTAL POLLUTION,276. |
| MLA | Ren, Zhengru,et al."Nitrogen deposition magnifies the positive response of plant community production to precipitation: Ammonium to nitrate ratio matters".ENVIRONMENTAL POLLUTION 276(2021). |
入库方式： OAI收割
来源：植物研究所
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