Knowledge Management System of Northwest Institute of Plateau Biology, CAS
| Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau | |
| Fang, Huajun1; Cheng, Shulan2; Yu, Guirui1; Cooch, Jules3; Wang, Yongsheng1; Xu, Minjie2; Li, Linsen2; Dang, Xusheng1; Li, Yingnian4 | |
| 2014 | |
| 发表期刊 | GEODERMA
 |
| ISSN | 0016-7061 |
| 卷号 | 213页码:444-452 |
| 文章类型 | Article |
| 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.; 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. |
| 关键词 | Alpine Meadow Atmospheric n Deposition Controlling Factors Soil Ch4 Uptake Soil n Availability |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 关键词[WOS] | FOREST SOILS ; ATMOSPHERIC METHANE ; CONIFEROUS FOREST ; TERRESTRIAL PLANTS ; CATTLE SLURRY ; BOREAL FOREST ; WATER-BALANCE ; N DEPOSITION ; INORGANIC N ; N2O FLUXES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| WOS记录号 | WOS:000329594800048 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.75.249.4/handle/363003/4291 |
| 专题 | 中国科学院西北高原生物研究所 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109 USA 4.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining 810001, Qinghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fang, Huajun,Cheng, Shulan,Yu, Guirui,et al. Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau[J]. GEODERMA,2014,213:444-452. |
| APA | Fang, Huajun.,Cheng, Shulan.,Yu, Guirui.,Cooch, Jules.,Wang, Yongsheng.,...&Li, Yingnian.(2014).Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau.GEODERMA,213,444-452. |
| MLA | Fang, Huajun,et al."Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau".GEODERMA 213(2014):444-452. |
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