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	Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe
	Jia J. Q.; Dong, Y. S.; Qi, Y. C.; Peng, Q.; Liu, X. C.; Sun, L. J.; Guo, S. F.; He, Y. L.; Cao, C. C.; Yan, Z. Q.
	2016
关键词	Vegetation carbon pools Increasing precipitation Nitrogen addition Interactive effect Temperate steppe north-american grasslands net primary productivity inner-mongolia soil respiration terrestrial ecosystems china responses precipitation photosynthesis limitation
英文摘要	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.
出处	Journal of Forestry Research
卷	27
期	3
页	621-629
语种	英语
ISSN号	1007-662X
DOI标识	10.1007/s11676-015-0128-7
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43001]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Jia J. Q.,Dong, Y. S.,Qi, Y. C.,et al. Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe. 2016.

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