3代木麻黄林系统重金属的分布和迁移特征  

Distribution and migration characteristics of heavy metals in three generations of Casuarina equisetifolia forest system

作　　者：余云龙[1] 邹烨燔 毕竟[1] 杜函函[1] 毕华[1] 

机构地区：[1]海南师范大学地理与旅游学院,海南海口571158

出　　处：《广东农业科学》2014年第6期188-192,共5页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(40963001);2013年海南省研究生创新科研课题

摘　　要：对海南岛滨海沙土上3代木麻黄林生态系统中重金属元素的分布与迁移特征进行研究。结果表明:(1)滨海沙土重金属含量顺序为Cu>Zn>Pb>Ni>As>Cd,3代木麻黄植物各个部位中,重金属元素分布各异,总体木麻黄林地上部分重金属含量高于地下部分,3代木麻黄林中Zn、Cu和Pb元素含量都位列前3位;(2)第1、2、3代木麻黄林对Cd均有较强的富集能力,Cd元素的富集系数分别为13.1269、7.0090和10.8176,远高于其他元素;(3)第1、2、3代木麻黄对Zn元素的迁移系数和富集系数分别为2.0946、1.7105、3.9634和3.6745、1.9651、5.7165,木麻黄植株内Zn元素远高于其他元素。Distribution and migration characteristics of heavy metals in three generations of Casuarina equisetifolia ecological forest system were studied in Hainan Island. The result showed that, the sequence of content of heavy metals in coastal sandy was CuZnPbNiAsCd, contents of heavy metals were different in different parts of three generations of C. equisetifolia plants, the content of heavy metal of the overground was higher than that of the underground in C. equisetifolia plants, and the concentrations of Zn, Cu, Pb were in the top three. The enrichment ability of all generations of C. equisetifolia on Cd was far stronger than other heavy metals, the enrichment coefficients of Cd of the first, second and third C. equisetifolia were 13.1269, 7.0090 and 10.8176, respectively. The content of Zn in all generations of C. equisetifolia was far higher than other heavy metals, the migration coefficients of Zn of the first, second and third C. equisetifolia were 2.0946, 1.7105 and 3.9634, the enrichment coefficients of Zn were 3.6745, 1.9651 and 5.7165, respectively.

关 键 词：木麻黄 重金属 分布 迁移特征 

分 类 号：X173[环境科学与工程—环境科学]