10种常见绿化树种重金属积累特性的研究

Preliminary Study on Heavy Metals Accumulation in Ten Tree Species in Kunming

测定了南洋杉(Araucaria cunninghamii)、印度榕(Ficus elastica)、直杆蓝桉(Eucalyptus maideni)等10种常见绿化树种在云南省昆明市两个污染程度不同地段的重金属积累特性。结果表明:不同树种对Zn、Pb、Mn、Cd的积累作用存在差异;同一树种中不同重金属的含量高低顺序为Mn﹥Zn﹥Pb﹥Cd;不同树种的重金属含量随环境污染程度的增加而升高;云南樟(Cinnamomum glanduliferum)、雪松(Cedrus deodara)、木犀(Osmanthus fragrans)分别对Zn、Pb、Mn、Cd积累作用较强,可作为治理污染植物;木犀、雪松、紫叶李(Prunus cerasiferaf.atropurpurea)、龙柏(Sabina chinensis cv.Kaizuca)分别对Zn、Pb、Mn、Cd敏感,可作为监测植物。

Ten common tree species were selected and their heavy metal content was determined at different areas in Kunming, Yunnan province. The results showed that different tree species had varied accumulation of Zn, Pb, Mn and Cd, and increased with pollution degree. Cinnamomum glanduliferum, Cedrus deodara, Osmanthus fragrans had higher accumulation rate in Zn, Pb, Mn, Cd, and could be planted at polluted areas for better control. O. fragrans, C. deodara, Prunus cerasifera and Sabina chinensis cv. Kaizuca was sensitive to Zn, Pb, Mn, Cd, and could be monitoring plant.