摘要
采集北京四环路道路两侧绿地中10种花灌木一二年生枝条、叶片和其根系土壤,利用电感耦合等离子体发射光谱仪(ICP-AES)测定其中Cd、Pb、Zn、Cu的含量,评价分析园林常用绿化灌木对土壤重金属的富集能力,以期为园林植物修复重金属污染土壤提供参考依据。结果表明:同一花灌木中重金属含量基本表现为Zn>Cu>Pb>Cd;Cd、Cu富集含量在同一花灌木器官中表现为叶>枝,而Pb、Zn富集含量多数植物表现为枝>叶;花灌木对不同重金属元素的富集系数存在着一定的差异,对Zn的平均富集系数较高,为0.50;对Cd、Pb、Cu的平均富集系数较低且相近,小于0.25。通过差异性分析,木槿、月季、紫丁香、珍珠梅分别对Cd、Pb、Zn、Cu的单一富集系数显著高于其它花灌木(P<0.05);从综合富集系数来看,紫丁香对Cd、Pb、Zn、Cu的综合富集能力最强。该研究结果为北京道路绿地及其它场地污染治理、景观建设的植物树种选择提供科学依据和参考。
The contents of Cd,Pb,Zn and Cu in the annual or biennial branches,leaves and soils of 10 flower shrubs were determined by ICP-AES.The heavy metal enrichment coefficient of 10 flower shrubs was evaluated and analyzed,in order to provide theoretical basis for garden plants to repair heavy metal contaminated soil.The results showed that the contents of heavy metals in the same flower shrubs were Zn>Cu>Pb>Cd.The enrichment of Cd and Cu in the same flower shrubs organs were leaves>branches,while Pb and Zn were branches>leaves.The enrichment coefficients of different heavy metals in flower shrubs were different.The average enrichment coefficient of zinc was the highest,which was 0.50.The average enrichment coefficient of Cd,Pb and Cu were lower and similar,less than 0.25.The single enrichment coefficients of Cd,Pb,Zn and Cu in Hibiscus syriacus,Rosa chinensis,Syringa oblata and Amygdalus triloba were significantly higher than those in other flower shrubs(P<0.05).From the comprehensive enrichment coefficient,Syringa oblata had the strongest enrichment ability for four heavy metals.The results provided scientific basis and reference for pollution control and plant species selection in Beijing road green space or other sites.
作者
唐敏
张欣
王美仙
TANG Min;ZHANG Xin;WANG Meixian(Beijing Urban and Rural Ecological Environment Laboratory, Beijing Key Laboratory of Flower Germplasm Innovation and Breeding,National Engineering Research Center for Floriculture,College of Landscape Architecture, Beijing Forestry University, Beijing 100083)
出处
《北方园艺》
CAS
北大核心
2019年第13期87-93,共7页
Northern Horticulture
基金
国家自然科学基金资助项目(31600574)
北京市共建项目专项资助项目
关键词
北京
道路绿地
重金属
花灌木
富集系数
Beijing
road green space
heavy metal
flower shrub
enrichment factor
