Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe
查看参考文献72篇
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文摘
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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. |
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来源
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Journal of Forestry Research
,2016,27(3):621-629 【核心库】
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DOI
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10.1007/s11676-015-0128-7
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关键词
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Vegetation carbon pools
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Increasing precipitation
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Nitrogen addition
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Interactive effect
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Temperate steppe
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地址
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Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Land Surface Pattern and Simulation,Chinese Academy of Sciences, Beijing, 100101
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1007-662X |
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学科
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植物学 |
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基金
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financially supported by the National Natural Science Foundation of China
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the Special Fund for Agro-scientific Research in the Public Interest
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文献收藏号
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CSCD:5698067
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72
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