论文信息 - Carbon isotope ratios of C 4 plants in loess areas of North China

Carbon isotope ratios of C 4 plants in loess areas of North China

Carbon isotope ratios (δ13C) of 89 C4 plant samples were determined from the loess area in North China. δ13C 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 δ13C values of C4 plants show a slight decreasing trend. The δ13C 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.

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