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作 者 ：刘维涛^1,2;张银龙¹;陈喆敏¹;周启星^2,3;罗红艳¹

期 刊 ：应用生态学报 2008年 19卷 04期 页码：752-756

摘 要 ：研究了南京某矿区11种树木的重金属吸收和分布特征.结果表明：树木对重金属的吸收和富集因树木种类、部位及重金属种类的不同而异.法国冬青对Cd的含量、富集和转运系数均高于其它树种，可以植物萃取方式修复土壤污染.Cd主要积累在树木根部，树木不同器官对Cd积累能力的总趋势为根＞叶及枝＞树皮＞树干；而Zn更多地积累在树木地上部（叶和枝）而非根部.11种树木对Cd和Zn的富集系数均<0.2.树木对Cd和Zn的转运系数差异显著，总体上是Zn>Cd.

Abstract:The study on the characteristics of cadmium (Cd) and zinc (Zn) absorpt
ion and distribution in 11 tree species in a mining area of Nanjing showed that
the absorption and accumulation of test heavy metals differed with tree species, their organs, and heavy metals themselves. Among the test tree species, Viburnum awabuki had the highest Cd absorption, accumulation, and translocation rates, which could be used for the remediation of polluted soils via phytoextraction. Cd was mainly accumulated in tree roots, and its accumulation in tree organs was generally in the order of root＞leaf and shoot＞bark＞stem. Zn was generally accumulated in above-ground part, such as in leaf and shoot, but not in root. For the test 11 tree species, the accumulation coefficients of Cd and Zn were all less than 0.2, while the translocation coefficients differed markedly, with that of Zn being higher than that of Cd in general.

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