气候变化领域集成服务门户(CCPortal): Nitrogen deposition accelerates greenhouse gas emissions at an alpine steppe site on the Tibetan Plateau

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DOI	10.1016/j.scitotenv.2020.144277
	Nitrogen deposition accelerates greenhouse gas emissions at an alpine steppe site on the Tibetan Plateau
	Qu, Songbo; Xu-Ri; Yu, Jiaoneng; Li, Fengzi; Wei, Da; Borjigidai, Almaz
通讯作者	Borjigidai, A (通讯作者)
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	765
英文摘要	The increase in atmospheric N deposition can alter the exchange of greenhouse gas (GHG) between the biosphere and atmosphere. The effect of N deposition on GHG is poorly understood in alpine steppe. Therefore, we conducted a 4-year experiment with multilevel N addition of 0, 10, 20, 40, 80, 160 kg N ha(-1) using the static chamber and gas chromatographymethod to quantify responses of GHG fluxes and characterize the relationship between GHG fluxes andNaddition rate in Namco located in the alpine steppe in the central Tibetan Plateau (TP). Themean CO2 efflux, CH4 uptake, N2O emission during growing seasons across four years were 33.59 +/- 16.41mg C m(-2) h(-1), -56.42 +/- 29.20 mu g C m(-2) h(-1), 0.67 +/- 4.40 mu g N m-2 h-1 respectively. CO2 efflux increased 1.55-22.6%, CH4 uptake decreased 5.96-20.1%, N2O emission increased 37.3-133.5% with N addition. Wealso observed a critical threshold of 40 kgN ha(-1) a(-1) of Naddition abovewhich the increase rate of N2O emissionwould diminish. Our current results implied that under the background of future N deposition, N induced C sequestration might be offset by GHG balance causing a heating effect to the climate. (C) 2020 Elsevier B.V. All rights reserved.
关键词	SOIL RESPIRATION TROPICAL FOREST N2O EMISSIONS CO2 EFFLUX FERTILIZER RESPONSES LIMITATION GRASSLAND FLUXES CH4
英文关键词	N deposition; C sequestration; CO2 efflux; CH4/N2O fluxes; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000616232300100
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260237
推荐引用方式 GB/T 7714	Qu, Songbo,Xu-Ri,Yu, Jiaoneng,et al. Nitrogen deposition accelerates greenhouse gas emissions at an alpine steppe site on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,765.
APA	Qu, Songbo,Xu-Ri,Yu, Jiaoneng,Li, Fengzi,Wei, Da,&Borjigidai, Almaz.(2021).Nitrogen deposition accelerates greenhouse gas emissions at an alpine steppe site on the Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,765.
MLA	Qu, Songbo,et al."Nitrogen deposition accelerates greenhouse gas emissions at an alpine steppe site on the Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 765(2021).