资兴市铅锌尾矿库区植物资源调查及耐性植物筛选  

Survey on plants resource and selection of tolerant species at Pb-Zn tailings pond area of Zixing City

作　　者：陈福春[1] 易心钰[2] 张路红[2] 

机构地区：[1]湘南学院,湖南郴州423000 [2]中南林业科技大学,湖南长沙410004

出　　处：《湖南林业科技》2016年第2期64-70,共7页Hunan Forestry Science & Technology

基　　金：校青年基金项目"郴州矿区土壤耐重金属植物的筛选"(2014XJ42)

摘　　要：通过对资兴铅锌尾矿区植物季节变化的调查,以及对该区植物重金属含量与分布特征的分析,初步筛选了适合于Pb、Zn尾矿库复合重金属污染土壤生态修复的植物种质资源。该区共记录高等植物81种,分属34科,其中自然定居62种,人工引种木本植物19种。重金属累积及转运特性分析表明,这些物种均对复合重金属污染具有较强的耐受性,其中,优势自然定居植物和人工栽种的木本植物对Pb、Zn富集能力均未达到超富集植物的临界阈值,一年蓬和青蒿对Cd的富集量分别达107 mg/kg和136 mg/kg,具有Cd超富集植物的基本特征,野菊花、酸模、青蒿、女贞和桂花树均具备超富集植物特征。研究结果为铅锌矿区及其污染场地生态修复提供了先锋植物和生态经济树种资源。A batch of plants resources,which can tolerate Pb,Zn,Cd,Cu heavy metal pollutants in soil,has been primarily selected through a survey of plant resources in terms of their seasonal changes,heavy metal contents and distri-butions in plants at Pb -Zn tailings pond area of Zixing City.There are total of 81 species of advanced plants belonging to 34 different families,which had demonstrated relatively strong tolerance to complex heavy metal pollution,and there are 62 native dominant species and 19 introducing species.Moreover,accumulation and transfer index analysis indicated that dominant species mentioned above could not be used as hyperaccumulator,but Cd accumulated in Erigeron annuus and Artemisia carvifolia was up to 107 mg/kg and 136mg/kg respectively,meanwhile,Hrysanthemum indicum,Rumex ace-tosa,Artemisia carvifolia,Ligustrum quihoui and Osmanthus fragrans have the potential of hyperaccumulator of heavy metals,and those can be used as pioneer and economic tress species for ecological restoration at Pb -Zn tailings pond ar-ea.

关 键 词：铅锌尾矿库 重金属污染 超富集植物 转运系数 资兴市 

分 类 号：X173[环境科学与工程—环境科学]