Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau
Fang, HJ; Cheng, SL; Yu, GR; Cooch, J; Wang, YS; Xu, MJ; Li, LS; Dang, XS; Li, YN
2014
发表期刊GEODERMA
ISSN0016-7061
卷号213页码:444-452
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.
文章类型Journal
关键词Alpine meadow Atmospheric N deposition Controlling factors Soil CH4 uptake Soil N availability
学科领域Agriculture
研究领域[WOS]Soil Science
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记录号WOS:000329594800048
出版者ELSEVIER SCIENCE BV
引用统计
被引频次:21[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.igsnrr.ac.cn/handle/311030/44606
专题生态系统网络观测与模拟院重点实验室_生态网络实验室
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GB/T 7714
Fang, HJ,Cheng, SL,Yu, GR,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, HJ.,Cheng, SL.,Yu, GR.,Cooch, J.,Wang, YS.,...&Li, YN.(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, HJ,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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