Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe

IMR OpenIR

	Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe
其他题名	Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe
	Jia Junqiang 1; Dong Yunshe 1; Qi Yuchun 1; Peng Qin 1; Liu Xinchao 1; Sun Liangjie 1; Guo Shufang 1; He Yunlong 1; Cao Congcong 1; Yan Zhongqing 1
	2016
发表期刊	JOURNAL OF FORESTRY RESEARCH
ISSN	1007-662X
卷号	27 期号:3 页码:621-629
摘要	Global change will lead to increases in regional precipitation and nitrogen (N) deposition in the semi-arid grasslands of northern China. We investigated the responses of vegetation carbon (C) pools to simulated precipitation and N deposition increases through field experiments in a typical steppe in Inner Mongolia. The treatments included NH4NO3 addition at concentrations of 0 (CK), 5 (LN, low nitrogen), 10 (middle nitrogen, MN), and 20 (HN, high nitrogen) (g m(-2) a(-1)) with and without water. After three consecutive years of treatment, from 2010 to 2012, water addition did not significantly change the size of the total vegetation C pools, but it significantly decreased the ratio of root:shoot (R:S) (P = 0.05) relative to controls. By contrast, N addition significantly increased the total vegetation C pools. The C pools in the LN, MN and HN treatments increased by 22, 39 and 44 %, respectively. MN produced the largest effect among the N concentrations, although differences between N-added treatments were not significant (P > 0.05). N addition significantly reduced the ratio of root:shoot (R:S) (P = 0.03). However, there were no significant interactive effects of water and N addition on the vegetation C pools.
其他摘要	Global change will lead to increases in regional precipitation and nitrogen (N) deposition in the semi-arid grasslands of northern China. We investigated the responses of vegetation carbon (C) pools to simulated precipitation and N deposition increases through field experiments in a typical steppe in Inner Mongolia. The treatments included NH4NO3 addition at concentrations of 0 (CK), 5 (LN, low nitrogen), 10 (middle nitrogen, MN), and 20 (HN, high nitrogen) (g m(-2) a(-1)) with and without water. After three consecutive years of treatment, from 2010 to 2012, water addition did not significantly change the size of the total vegetation C pools, but it significantly decreased the ratio of root:shoot (R:S) (P = 0.05) relative to controls. By contrast, N addition significantly increased the total vegetation C pools. The C pools in the LN, MN and HN treatments increased by 22, 39 and 44 %, respectively. MN produced the largest effect among the N concentrations, although differences between N-added treatments were not significant (P > 0.05). N addition significantly reduced the ratio of root:shoot (R:S) (P = 0.03). However, there were no significant interactive effects of water and N addition on the vegetation C pools.
关键词	NET PRIMARY PRODUCTIVITY INNER-MONGOLIA SOIL RESPIRATION TERRESTRIAL ECOSYSTEMS RESPONSES PRECIPITATION PHOTOSYNTHESIS GRASSLANDS LIMITATION DYNAMICS Vegetation carbon pools Increasing precipitation Nitrogen addition Interactive effect Temperate steppe
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Special Fund for Agro-scientific Research in the Public Interest]
CSCD记录号	CSCD:5698067
引用统计	被引频次：2[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/143133
专题	中国科学院金属研究所
作者单位	1.中国科学院 2.中国科学院大学 3.Inner Mongolia Acad Agr & Anim Husb Sci, Grassland Res Institute, Hohhot 010031, Peoples R China 4.中国科学院金属研究所
推荐引用方式 GB/T 7714	Jia Junqiang,Dong Yunshe,Qi Yuchun,et al. Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe[J]. JOURNAL OF FORESTRY RESEARCH,2016,27(3):621-629.
APA	Jia Junqiang.,Dong Yunshe.,Qi Yuchun.,Peng Qin.,Liu Xinchao.,...&Yan Zhongqing.(2016).Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe.JOURNAL OF FORESTRY RESEARCH,27(3),621-629.
MLA	Jia Junqiang,et al."Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe".JOURNAL OF FORESTRY RESEARCH 27.3(2016):621-629.