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Carbon isotope ratios of C4 plants in loess areas of North China |
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| Authors: | Wang Guoan Han Jiamao Zhou Liping Xiong Xiaogang Tan Ming Wu Zhenhai and Peng Jun |
| Institution: | (1) Department of Plant Nutrition, China Agricultural University, Beijing, 100094, China;(2) Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China;(3) College of Environmental Sciences, MOE Laboratory for Earth Surface Processes, Peking University, Beijing, 100871, China;(4) Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China;(5) Northwest Sci-Tech University of Agriculture and Forestry, Yangling, 712100, China;(6) Network Center, China Agricultural University, Beijing, 100094, China |
| Abstract: | Carbon isotope ratios (δ 13C) of 89 C4 plant samples were determined from the loess area in North China. δ 13C values vary between −10.5‰ and −14.6‰ with a mean of −12.6‰. Along a precipitation gradient from the semi-moist area to the semiarid area, then to the arid area, the δ 13C values of C4 plants show a slight decreasing trend. The δ 13C values of C4 plants in the dry season are found lower than those in the wet season. These trends are opposite to those observed for C3 species. |
| Keywords: | C4 plants carbon isotope ratios loess area |
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