Responses of ecosystem respiration and its components to fertilization in an alpine meadow on the Tibetan Plateau

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	Responses of ecosystem respiration and its components to fertilization in an alpine meadow on the Tibetan Plateau
	Jiang, Jing(蒋婧) ; Zong, N ; Song, MH ; Shi, PL ; Ma, WL ; Fu, G ; Shen, ZX ; Zhang, XZ ; Ouyang, H
刊名	EUROPEAN JOURNAL OF SOIL BIOLOGY
	2013
卷号	56 页码:101-106
关键词	Nutrient enrichment Aboveground plant respiration Soil respiration Aboveground biomass Soil temperature Soil water content
通讯作者	Shi, PL
英文摘要	Nitrogen (N) deposition alters composition and productivity of plant community, plant litter quality and quantity, composition and activity of soil microbial community. All these changes would influence ecosystem and soil CO2 emissions. We established a fertilization experiment in an alpine meadow in hinterland of the Tibetan Plateau to detect the responses of ecosystem and soil respiration to fertilization and further explore forces driving changes of CO2 fluxes. The fertilization experiment was conducted in 2008, in which five treatments were manipulated, i.e. three N levels of 0, 5, 10 g N m(-2) yr(-1) (coded as Control, LN and HN, respectively), and two N levels combined with constant level of 5 g phosphorus (P) m(-2) yr(-1), respectively (coded as LN + P and HN + P. respectively). Ecosystem respiration (Rec), above-ground plant respiration (Ra), and soil respiration (Rs) were measured in growing season of 2010 the third year of the experiment. N addition alone did not affect Rec, Ra or Rs. However, combination of N and P increased Rec, Ra and Rs mainly in later period of the growing season. Similarly, N addition did not affect aboveground biomass, but combination of N and P increased aboveground biomass. Rec, Ra and Rs were positively correlated with aboveground biomass, but were not correlated with belowground biomass, indicates enhancement of aboveground biomass by nutrient enrichment could contribute a large part of variation of ecosystem and soil respiration, especially at the end of the growing season. It is suggested that apparent negative effect of soil temperature on ecosystem and soil respiration could be confounded by the effect of aboveground biomass, especially under nutrient enrichment. (C) 2013 Elsevier Masson SAS. All rights reserved.
收录类别	SCI
资助信息	State Basic Research Development Program of China (973 Program) 2010CB833502；Institute of Geographic Sciences and Natural Resources Research, CAS 201003012；Chinese Academy of Sciences
公开日期	2013-07-23
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/27934]
专题	地理科学与资源研究所_研究生部
推荐引用方式 GB/T 7714	Jiang, Jing,Zong, N,Song, MH,et al. Responses of ecosystem respiration and its components to fertilization in an alpine meadow on the Tibetan Plateau[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2013,56:101-106.
APA	Jiang, Jing.,Zong, N.,Song, MH.,Shi, PL.,Ma, WL.,...&Ouyang, H.(2013).Responses of ecosystem respiration and its components to fertilization in an alpine meadow on the Tibetan Plateau.EUROPEAN JOURNAL OF SOIL BIOLOGY,56,101-106.
MLA	Jiang, Jing,et al."Responses of ecosystem respiration and its components to fertilization in an alpine meadow on the Tibetan Plateau".EUROPEAN JOURNAL OF SOIL BIOLOGY 56(2013):101-106.