江西农业学报2024，Vol.36Issue(1)：154-161,8.DOI:10.19386/j.cnki.jxnyxb.2024.01.022
绿洲城市交通干道绿化树种重金属富集特征及风险评价
Heavy Metal Enrichment Characteristics and Risk Assessment of Greening Tree Species in Urban Traffic Road of Oasis
摘要
Abstract
Six common green tree species in Zhangye traffic road green space(experimental area)and Runquanhu Park green space(control area)were selected as research materials.Inductively coupled plasma method(ICP)was used to determine the contents of heavy metals(Cr,Cd,Pb,Cu,Zn)in roots,bark and leaves of greening tree species,and the heavy metal content,enrichment coefficient(BCF),transport coefficient(TF),Muller soil accumulation index(Igeo)and enrichment factor(EF)in different tissues of green tree species were analyzed.(1)the order of heavy metal content in different tree species was Zn＞Cr＞Cu＞Pb＞Cd,the order of Cr,Cu content was bark＞roots＞leaves,Zn content was bark＞leaves＞roots,and Cd content was roots＞bark＞leaves.(2)The roots of Picea crassifolia had strong enrichment of Cd,the bark of of Picea crassifolia had strong enrichment of Cr and Zn,and ash bark of ash had strong enrichment of Cu.The leaves and bark of elm plum had the strongest ability to transport Cr,the leaves and bark of pine camphor had the strongest ability to transport Zn,and the bark of green tree species had stronger ability to transport heavy metals than the leaves.(3)The surface soil Cd near traffic roads was moderately polluted,and Cr exceeded the screening value and control value of soil pollution risk for construction land.(4)Zn was mainly derived from human activities,while Pb and Cu sources were affected by certain transportation activities.Picea crassifolia,white wax and elm plum can be used as the preferred afforestation trees for heavy metal pollution control of road soil in Zhangye City.关键词
土壤重金属/绿化树种/富集因子/青海云杉Key words
Soil heavy metals/Greening tree species/Enrichment factors/Picea crassifolia分类
资源环境引用本文复制引用
张纯曦,苗银,何靖,李鸿儒,占玉芳,阿丽亚·拜都热拉..绿洲城市交通干道绿化树种重金属富集特征及风险评价[J].江西农业学报,2024,36(1):154-161,8.基金项目
甘肃省青年科技基金计划"河西走廊地区抗土壤重金属污染绿化树种筛选"(21JR7RG882) （21JR7RG882）
甘肃省林业和草原自列科技计划项目"张掖市交通干道土壤—绿化树种生态系统重金属富集特征及生态风险评价"(2023kj08) （2023kj08）
国家自然科学基金项目"绿洲城市路侧树种不同器官对降尘和土壤重金属的富集及转运机理研究"(31971713). （31971713）
