浙江农林大学学报2024，Vol.41Issue(4)：752-759,8.DOI:10.11833/j.issn.2095-0756.20230630
不同绿化树种对镉的富集特征
Cd accumulation characteristics of different greening tree species
摘要
Abstract
[Objective]While trees can accumulate heavy metals,their accumulation characteristics are currently unclear;this,to some degree,restricts the application of the technology of using trees to remediate heavy metal-contaminated soil.This study was designed to explore the cadmium(Cd)accumulation capacities of five greening tree species.[Method]The Cd accumulation characteristics of different parts of various greening trees(Paulownia fortunei,Catalpa bungei,Platanus acerifolia,Populus nigra,and Salix babylonica)planted in Cd-contaminated soil were analyzed,and the total amounts of Cd in the trees were determined.[Result]All the tested trees had a certain Cd accumulation capacity,and the cumulative amount of Cd per tree ranged from 43.01 to 886.28 mg·plant-1.Among the trees,S.babylonica had the highest accumulation amount of Cd(886.28 mg·plant-1),followed by Populus nigra(392.51 mg·plant-1).The Cd accumulation ability varied among different tree species and parts,with concentration coefficients ranging from 0.07 to 0.56,0.10 to 1.24,0.06 to 1.04,0.32 to 1.58,and 0.06 to 0.97 for different parts of Paulownia fortunei,C.bungei,Platanus acerifolia,Populus nigra,and S.babylonica,respectively.The concentration coefficients of most parts(except for the stem bark)of Populus nigra were higher than those of the other trees.The Cd concentrations in the root bark,stem bark,and branch bark of all trees were significantly higher than those in their corresponding root wood,stem wood,and branch wood(P＜0.05).A highly significant positive correlation was found between the Cd contents in different parts of trees and those in the soil(P＜0.01).[Conclusion]The tested tree species accumulated Cd mainly in their branches and stems.Paulownia fortunei,C.bungei,and Platanus acerifolia accumulated Cd mainly in their branches,while Populus nigra and S.babylonica accumulated Cd mainly in their stems.Populus nigra and S.babylonica displayed higher Cd concentrations,which are the preferred tree species for the remediation of Cd-contaminated soil.[Ch,5 fig.2 tab.23 ref.]关键词
树木/镉/积累总量/富集系数/土壤修复Key words
trees/cadmium/total amount of accumulation/concentration coefficient/soil remediation分类
农业科技引用本文复制引用
李业庆,郑叶,魏奕博,王丹,李烜桢,范国强..不同绿化树种对镉的富集特征[J].浙江农林大学学报,2024,41(4):752-759,8.基金项目
中原学者科学家工作室建设专项(豫科[2018]185) （豫科[2018]185）
河南省科技兴林项目(YLK202210) （YLK202210）
