Seasonal changes of CO2, CH4 and N2O fluxes in different types of alpine grassland in the Qinghai-Tibetan Plateau of China

doi:10.1016/j.soilbio.2014.10.026

CORC > 中国农业科学院 > 农业环境与可持续发展研究所 > 气候变化研究室

	Seasonal changes of CO2, CH4 and N2O fluxes in different types of alpine grassland in the Qinghai-Tibetan Plateau of China
	Li, Yuanyuan 1; Dong, Shikui 1; Liu, Shiliang 1; Zhou, Huakun 2; Gao, Qingzhu 3; Cao, Guangmin 2; Wang, Xuexia 1; Su, Xukun 1; Zhang, Yong 1; Tang, Lin 1
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2015
卷号	80 页码:306-314
关键词	Qinghai-Tibetan Plateau Nitrous oxide Carbon dioxide Methane
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2014.10.026
通讯作者	Li, Yuanyuan
英文摘要	Grassland degradation and grassland use type changes are associated with dynamics in soil properties and biogeochemical cycling, with implications for carbon and nitrogen cycling and trace gas fluxes. To examine the influence of grassland degradation and grassland use type changes on gases fluxes, emissions of CO2, CH4 and N2O were measured in three alpine ecosystems (alpine meadow, alpine steppe and alpine desert) with healthy and degraded grasslands on the Qinghai-Tibetan Plateau in May, August and October 2013. The lowest CO2, CH4 and N2O fluxes occurred in alpine deserts, and the highest fluxes occurred in alpine steppe. In general, degraded grasslands had relatively higher gas fluxes than healthy grasslands, except for CH4 dynamics. The temporal variation in gas fluxes indicated that CO2 and N2O fluxes were highest in August and lowest in May, while the lowest fluxes of CH4 were in August. Stepwise linear analysis was employed to explore the key factors for different gas fluxes. In alpine meadow and alpine steppe, the variation in CO2 and N2O fluxes in August could be explained by soil temperature and soil water content, while in May and October, soil physical and chemical properties, including soil pH, clay content and NO3--N, were the key factors. Soil water content and NH4+-N contributed to the CH4 fluxes. However, in alpine desert, soil water content was the key factor affecting gas emissions for different experimental sites. These results indicate that the examined alpine grasslands emitted a large amount of gas emissions especially after the grassland had degraded; therefore, more attention should be paid to protecting grassland degradation in the Qinghai-Tibetan Plateau. (C) 2014 Elsevier Ltd. All rights reserved.
学科主题	Soil Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000346545800036
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19774]
专题	农业环境与可持续发展研究所_气候变化研究室
作者单位	1.Beijing Normal Univ, Sch Environm, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Inst Northwest Biol, Xining 810003, Peoples R China 3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Li, Yuanyuan,Dong, Shikui,Liu, Shiliang,et al. Seasonal changes of CO2, CH4 and N2O fluxes in different types of alpine grassland in the Qinghai-Tibetan Plateau of China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2015,80:306-314.
APA	Li, Yuanyuan.,Dong, Shikui.,Liu, Shiliang.,Zhou, Huakun.,Gao, Qingzhu.,...&Wu, Xiaoyu.(2015).Seasonal changes of CO2, CH4 and N2O fluxes in different types of alpine grassland in the Qinghai-Tibetan Plateau of China.SOIL BIOLOGY & BIOCHEMISTRY,80,306-314.
MLA	Li, Yuanyuan,et al."Seasonal changes of CO2, CH4 and N2O fluxes in different types of alpine grassland in the Qinghai-Tibetan Plateau of China".SOIL BIOLOGY & BIOCHEMISTRY 80(2015):306-314.