Soil moisture, temperature and nitrogen availability interactively regulate carbon exchange in a meadow steppe ecosystem
文献类型：期刊论文
| 作者 | Hasi, Muqier1; Zhang, Xueyao; Niu, Guoxiang1; Wang, Yinliu1; Geng, Qianqian1; Quan, Quan3; Chen, Shiping1 ; Han, Xingguo1; Huang, Jianhui1
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| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2021 |
| 卷号 | 304 |
| 关键词 | Net ecosystem productivity Ecosystem respiration Gross ecosystem productivity Meadow steppe Nitrogen addition Soil water content |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2021.108389 |
| 文献子类 | Article |
| 英文摘要 | Primary productivity in terrestrial ecosystems can be significantly altered by the predicted increases in nitrogen (N) deposition, but it is still unclear how N deposition influences the carbon (C) exchange processes especially in dryland ecosystems. In this study, a 3-year experiment with two types of fertilizers and five N addition levels was conducted in a semiarid steppe of Erguna, Inner Mongolia to assess the effects of exogenous N input on net ecosystem productivity (NEP), gross ecosystem productivity (GEP) and ecosystem respiration (ER). Our results showed that enhanced N input significantly increased NEP and GEP when the volumetric soil water content (VWC) was greater than 15% (v/v%), but had trivial and inconsistent effects when VWC was less than that threshold. Moreover, the NEP and GEP increased significantly with increasing N addition but leveled off when the N input reached 10 g N m(-2) year(-1) and the VWC was above 15%. However, the ER showed a significant increase with N addition rates, regardless of soil water content. Our main findings are as follows. First, the ecosystem C exchange can be significantly enhanced by addition of N only when soil moisture exceeds certain threshold, suggesting co-limitation of water and N in the grassland ecosystem that we studied. Second, in addition to concurrent consideration of water, temperature and N as well as their interactions also need to be accounted for. Third, the frequency of days with the VWC being higher than 15% accounted only around one third of days during the three growing seasons. Taken together, our findings imply that the expected increases of carbon sequestration should be minimal under N deposition in the Inner Mongolia grassland ecosystems. |
| 学科主题 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
| 出版地 | AMSTERDAM |
| 电子版国际标准刊号 | 1873-2240 |
| WOS关键词 | SPECIES RICHNESS ; N DEPOSITION ; RESPONSES ; WATER ; LIMITATION ; FLUXES ; EUTROPHICATION ; PHOTOSYNTHESIS ; BIODIVERSITY ; DEPENDENCE |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000652014300023 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China [31430016, 31670483] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/26596]  |
| 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.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hasi, Muqier,Zhang, Xueyao,Niu, Guoxiang,et al. Soil moisture, temperature and nitrogen availability interactively regulate carbon exchange in a meadow steppe ecosystem[J]. AGRICULTURAL AND FOREST METEOROLOGY,2021,304. |
| APA | Hasi, Muqier.,Zhang, Xueyao.,Niu, Guoxiang.,Wang, Yinliu.,Geng, Qianqian.,...&Huang, Jianhui.(2021).Soil moisture, temperature and nitrogen availability interactively regulate carbon exchange in a meadow steppe ecosystem.AGRICULTURAL AND FOREST METEOROLOGY,304. |
| MLA | Hasi, Muqier,et al."Soil moisture, temperature and nitrogen availability interactively regulate carbon exchange in a meadow steppe ecosystem".AGRICULTURAL AND FOREST METEOROLOGY 304(2021). |
入库方式： OAI收割
来源：植物研究所
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