应用生态学报2017，Vol.28Issue(9)：2907-2916,10.DOI:10.13287/j.1001-9332.201709.010
城市绿化树种香樟不同器官对土壤重金属的富集特征
Characteristics of heavy metal enrichment efficiency in different organs of urban green tree Cinnamomum camphora
摘要
Abstract
The objective of this study was to explore the enrichment efficiency of heavy metals in Cinnamomum camphora organs under soil heavy metal concentration and pollution gradients.The compartments of the organs were leaf,branch,trunk,and rhizosphere soils,while the heavy metals under investigation were Cu,Zn,Pb,Cr,Mn and Ni.The results showed that the concentration of heavy metals was significantly different by organs,types of heavy metals,and concentration of rhizosphere soil heavy metals.Heavy metal concentration in leaf and branch followed the order of Mn ＞Zn ＞ Cu ＞ Cr ＞ Pb ＞ Ni,while in trunks it followed the order of Mn ＞ Zn ＞ Cr ＞ Pb ＞ Ni ＞ Cu.The enrichment coefficient of Mn in leaf had the maximum of 2.409,and that of Ni in trunk was 7.6 and 16 times higher than that in leaf and branch,respectively.In addition,the enrichment coefficients of Cu,Zn,Pb,Cr and Ni in the truck were much higher than the other organs under different soil heavy metal concentration gradients.The heavy metal enrichment capacities of Cu,Zn,Pb,Cr,Mn and Ni followed the order of leaf ＞ trunk ＞ branch.As the pollution gradient increased,the heavy metal enrichment coefficient decreased gradually.The heavy metal enrichment efficiency of C.camphora (DBH =22 cm) followed the order of leaf ＞ trunk ＞ branch,and the enrichment of Cu,Zn,Pb,Cr and Ni in trunk was significantly higher than in the other organs.The study showed that the C.camphora had a certain enrichment capacity to absorb heavy metals of Cu.Zn.Pb.Cr.Mn and Ni in soils.The enrichment efficiency of Pb and Ni in trunk was significantly higher than the other organs,which accounted for 82.7％ and 91.9％ of the total accumulation.Thus,C.camphora has the potential to be an alternative option in phytoremediation of heavy metal contaminated soils.关键词
香樟/污染等级/重金属/富集效能/土壤Key words
Cinnamomum camphora/pollution gradient/heavy metal/enrichment efficiency/soil引用本文复制引用
车继鲁,余树全,刘晖,邱问心,温雅婷..城市绿化树种香樟不同器官对土壤重金属的富集特征[J].应用生态学报,2017,28(9):2907-2916,10.基金项目
本文由浙江省重点科技创新团队项目(2011R50027)资助 （2011R50027）
This work was supported by the Science and Technology Innovation Team Program of Zhejiang Province (2011R50027). （2011R50027）
