10个常绿树种叶片中铁锌铜锰的含量特征

通过对10个常绿树种在昆钢污染区和相对无污染区叶片中铁锌铜锰4种重金属元素含量的实验测定和分析,研究了各树种叶片中的金属含量特征和对污染的吸收净化能力。结果表明,不同的树种对不同重金属的抗性和吸收净化能力不同,参试的10个树种均对重金属元素表现出较好的抗性和吸收净化能力,叶片中铁含量最高的是飞蛾槭,锌含量最高的是鳞斑荚蒾,铜含量最高的是金叶子,锰含量最高的是滇青冈。叶片中铁和锌、铜含量的相关性达极显著和显著水平,其他元素之间相关性均不显著。按各树种的综合富积量进行排序,鳞斑荚蒾>红果树>飞蛾槭>茶条木>金叶子>云南泡花树>云南木樨榄>滇青冈>云南卫矛>子楝树。

Contents of Iron,Zinc,Copper and Manganese in the Leaves of 10 Evergreen Tree Species

Ten evergreen tree species growing in polluted area(Kunming Iron and Steel Plant) and a relatively pollution-free zone,respectively were selected to examine the characteristics of metal contents in the leaves and absorption capabilities by measuring the contents of 4 metals,including Fe,Zn,Cu,and Mn.The results showed that all the 10 tree species demonstrated better resistance to the metals and absorption capability,while differences were observed among different tree species.The highest contents of iron,zinc,copper,and manganese were found in the leaves of Acer oblongum,Viburnum punctatum,Craibiodendron yunnanense,and Cyclobalanopsis glaucoides,respectively.The correlationships among the contents of iron and zinc and copper were most significant or significant,while no significant correlationships were found among other metals.Considering the integrated accumulation amount for the metals,an order was given among 10 tree species: V.punctatum >Stranvaesia davidiana>A.oblongum>Delavaya yunnanensis>C.yunnanense >Meliosma yunnanensis>Olea yunnanensis>C.glaucoides >Euonymus yunnanensis >Decaspermum fruticosum.