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INVESTIGATION INTO THE RULES OF TRANSPORT OF SOIL ORGANIC CARBON BY USING Δ~(13)C VALUES

Liu Qiming\ Piao Hechun\ Guo Jingheng (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002) Wei Luming\ Yu Dengli (Administration Bureau of Maolan State Natural Reserved Area, Lib  
Significant differences are noticed in δ\{\}\+\{13\}C value between C\-3 plants and C\-4 plants. According to this feature, soil samples were collected from three profiles on farms and forest lands near the Maolan karst forest where C\-3 plants and C\-4 plants are growing now. Some rules of transport of soil organic carbon can be deduced in terms of the measured δ\{\}\+\{13\}C values of total organic carbon and different size—density fractions.
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