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Science in China Series E-Technological Sciences, 2001, Vol 44, p. 134-137
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Application of carbon isotope for discriminating sources of soil CO2 in karst area, Guizhou
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Li T. Y. , Wang S. J. ,
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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: activity, area, atmospheric co2, carbon, carbon isotope, carbonate, carbonate rock, china, co2, depth, dissolution, environment, grasses, guizhou province, isotope, its, karst, karst area, matter, organic matter, organic-matter, people, plant, profile, profiles, respiration, rock, root, soil, soil co2, soil depth, source, state, surface, time, times,
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