桑树对矿区土壤中重金属的原位去除效应研究

为了研究矿区栽培种桑树对4种金属的富集特征和能力，在湖南浏阳七宝山矿区污染土壤上，以‘湖桑一号’为研究材料，分别测定植物各部分和土壤中Cu、Pb、Cd、Zn 4种重金属含量。结果表明：桑树各部位单位重量中Cu的含量的趋势为根(33.13 mg/kg)>叶(13.38 mg/kg)>皮(7.51 mg/kg)>骨(4.93 mg/kg)，Pb的含量的趋势为根(33.13mg/kg)>叶(10.32 mg/kg)>皮(3.35 mg/kg)>骨(1.73 mg/kg)，Cd的含量的趋势为根(4.53 mg/kg)>叶(1.90 mg/kg)>皮(1.57 mg/kg)>骨(1.03 mg/kg)，Zn的含量的趋势为根(317.72 mg/kg)>叶(186.53 mg/kg)>皮(105.07 mg/kg)>骨(89.16 mg/kg)。每平方米耕作层土壤上桑树对Cu的迁移总量为12116.1 mg，修复年限为2.01年，对Pb的迁移总量为7409.83 mg，修复年限为15.45年，对Cd的迁移总量为2056.4 mg，修复年限为1.26年，对Zn的迁移总量为254532.8 mg，修复年限为0.39年。

Effect of Heavy Metal Home Position Elimination on the Mulberry in Mining Area Soil

In Liuyang Qibaoshan mining area Hu ＇ nan Province, heavy metal pollution in soil, mulberry variety ＇ Lake MulberryⅠ ＇ was used as materials to determine the content of the four kinds of heavy metal Cu and Pb and Cd, Zn in the soil and plant, to have a new understanding of the enrichment characteristics and the ability of four heavy metals in the mining area, and to predict the expected years of repairing to normal in mining area soil after contaminated. The results showed that each part of the mulberry trees the content of Cu in unit dry weight content of the root （33.13 mg/kg）leaf （13.38 mg/kg）skin （7.51 mg/kg）bone （4.93 mg/kg）, the content of Pb of the root （33.13 mg/kg）leaf （10.32 mg/kg）skin （3.35 mg/kg）bone （1.73 mg/kg）, the content of Cd of the root （4.53 mg/kg）leaf （1.90 mg/kg）skin （1.57 mg/kg）bone （1.03 mg/kg）, the content of Zn of the root （317.72 mg/kg）leaf （186.53 mg/kg）skin （105.07 mg/kg）bone （89.16 mg/kg）. The amount of heavy metals transferred from tillage layer soil per square by mulberry, Cu 12116.1 mg, Pb 7409.83 mg, Cd 2056.4 mg, Zn 254532.8 mg.