Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau
文献类型：SCI/SSCI论文
| 作者 | Fang H. J. ; Cheng S. L. ; Yu G. R. ; Cooch J. ; Wang Y. S. ; Xu M. J. ; Li L. S. ; Dang X. S. ; Li Y. N. |
| 发表日期 | 2014 |
| 关键词 | Alpine meadow Atmospheric N deposition Controlling factors Soil CH4 uptake Soil N availability forest soils atmospheric methane coniferous forest terrestrial plants cattle slurry boreal forest water-balance n deposition inorganic n n2o fluxes |
| 英文摘要 | It is crucial to understand the effects of enhanced nitrogen (N) deposition on soil methane (CH4) uptake to develop a better comprehension of carbon (C) dynamics in terrestrial ecosystems. A two-year field study was conducted to assess the effects of various forms of N (NH4+ and N-3(-)) and associated N deposition rates (0, 10,20 and 40 kg N ha(-1) yr(-1)) on alpine meadow soil CH4 fluxes on the Qinghai-Tibetan Plateau, China. Soil CH4 fluxes, soil temperature, and soil moisture were monitored weekly using the static chamber technique and gas chromatography. Soil inorganic N pools, soil pH and aboveground biomass were measured monthly to examine the key controlling factors of soil CH4 flux. Our results showed that N addition significantly promoted plant growth and changed soil water-filled pore space (WFPS), but did not alter soil inorganic N storages over the short term. Low rates of N addition significantly decreased the seasonal amount of CH4 uptake by 8.6% compared with the control. Soil CH4 fluxes were mainly determined by soil WFPS, followed by inorganic N availability. N addition increased the contribution of soil WFPS, pH and soil NO3- storage. The observed reduction in CH4 uptake caused by N addition may be largely due to a decrease in physical diffusion, as the biochemical inhibition effects on methanotrophic bacteria are minor. These results suggest that soil inorganic N is a regulatory factor of soil CH4 uptake, and its promotion or inhibition to soil CH4 uptake depends on the N status in terrestrial ecosystems. (C) 2013 Elsevier B.V. All rights reserved. |
| 出处 | Geoderma |
| 卷 | 213 |
| 页 | 444-452 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0016-7061 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29897]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Fang H. J.,Cheng S. L.,Yu G. R.,et al. Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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