| Application of carbon isotope for discriminating sources of soil CO_2 in karst area, Guizhou |
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| 引用本文： | 黎廷宇,王世杰. Application of carbon isotope for discriminating sources of soil CO_2 in karst area, Guizhou[J]. 中国科学E辑(英文版), 2001, 0(Z1) |
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| 作者姓名： | 黎廷宇 王世杰 |
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| 作者单位： | LI Tingyu & WANG ShijieState Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China (Grant No. 49833002 and 49703048). |
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| 摘 要： | Using carbon isotope of soil CO2 this paper discussed the sources of soil CO2 in karst area, Guizhou Province, China. Oxidation-decomposition of organic matter, respiration of plant root and activity of microbe are thought to be the major sources of soil CO2. However, in karst area, the contribution of dissolution of underlying carbonate rock to soil CO2 should be considered as in acidic environment. Atmospheric CO2 is the major composition of soil CO2 in surface layer of soil profiles and its proportion in soil CO2 decreases with increase of soil depth. CO2 produced by dissolution of carbonate rock contributes 34%-46% to soil CO2 below the depth of 10cm in the studied soil profiles covered by grass.
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Application of carbon isotope for discriminating sources of soil CO_2 in karst area, Guizhou |
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| LI Tingyu , WANG ShijieState Key Laboratory of Environmental Geochemistry. Application of carbon isotope for discriminating sources of soil CO_2 in karst area, Guizhou[J]. Science in China(Technological Sciences), 2001, 0(Z1) |
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| Authors: | LI Tingyu & WANG ShijieState Key Laboratory of Environmental Geochemistry |
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| Affiliation: | LI Tingyu & WANG ShijieState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China |
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| Abstract: | Using carbon isotope of soil CO2 this paper discussed the sources of soil CO2 in karst area, Guizhou Province, China. Oxidation-decomposition of organic matter, respiration of plant root and activity of microbe are thought to be the major sources of soil CO2. However, in karst area, the contribution of dissolution of underlying carbonate rock to soil CO2 should be considered as in acidic environment. Atmospheric CO2 is the major composition of soil CO2 in surface layer of soil profiles and its proportion in soil CO2 decreases with increase of soil depth. CO2 produced by dissolution of carbonate rock contributes 34%-46% to soil CO2 below the depth of 10cm in the studied soil profiles covered by grass. |
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| Keywords: | carbon isotope sources of soil CO2 karst area. |
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