摘要
对保定市河道公路不同年龄毛白杨Pb,Cd,Cu,Zn,Cr,Ni含量进行了研究,并测定了毛白杨根际土壤重金属含量。结果表明:土壤Cd污染严重。整体上3 a生的毛白杨吸收重金属的能力大于5 a生和10 a生的毛白杨,并且重金属含量呈现Zn>Cu>Cd>Cr>Pb>Ni的规律。毛白杨吸收的重金属表现为叶、根部和树皮较大,枝和树干较小的基本趋势。Pb,Cr,Zn,Ni重金属转移能力随着年龄的增加而降低。Cd的转移系数随着年龄的增加呈现增加的趋势。年龄较小的毛白杨具有较高的富集系数。毛白杨富集Pb,Cu,Zn,Cr,Ni的能力较差,但具有较强的Cd富集能力。Pb,Cd,Cu,Zn富集系数叶部较大,但Cr,Ni富集系数树皮较大。
Study on Pb,Cd, Cu, Zn, Cr,Ni absorption and distribution of Populus tornentosa of different aged along stream way in Baoding city were studied,and heavy metal content in soil near root of Populus tomentosa was measured. The results showed that the highest pollution is Cd. Absorption ability of heavy metal is 3 years〉5 years〉10 years of Populus tomentosa, and heavy metal content is Zn〉Cu〉Cd〉Cr〉Pb〉Ni. Heavy meatal of Populus tornentosa absorption is highest in leaf, the root and bark, but the branch and shoot are the smaller. Translocation ability in Pb,Cr, Zn and Ni are reduced with incresement of age, hut Cd are reversed. Enrichment factor of Populus tomentosa in three aged is the highest. Enrichment ability in Pb,Cu, Zn,Cr and Ni are poor,but Cd is better. Enrichment factor in Pb,Cd,Cu and Zn of leaf is major,but Cr, Ni of bark is major.
出处
《水土保持学报》
CSCD
北大核心
2009年第3期78-81,106,共5页
Journal of Soil and Water Conservation
基金
河北省林业局项目(0803015)
关键词
毛白杨
重金属
吸收
分布
Populus tomentosa
heavy metals absorption
distribution
