不同品种小白菜对镉的吸收积累差异.pdf

应用生态学报2009年3月第20卷第3期
ChineseJournalofAppliedEcology,Mar.2009,20(3):736-740

不同品种小白菜对镉的吸收积累差异*

1,2**221
陈瑛李廷强杨肖娥金叶飞
(1绍兴文理学院生命科学学院,浙江绍兴312000;2浙江大学环境与资源学院污染环境修复与生态健康教育部重点实验室,
杭州310029)

摘要通过盆栽试验,研究了60个小白菜品种在不同程度镉污染土壤中吸收和积累镉能
-1
力的差异.结果表明:在土壤镉浓度为016mg#kg时,小白菜镉含量超过国家标准的为
8133%;而在土壤镉浓度为112mg#kg-1时其超标率达66167%,表明小白菜容易受到镉污
染.2种镉浓度下白菜地上部分镉含量均低于国家食用标准,且其生物量不受影响的小白菜品
种为:长梗白菜、上海青、矮箕苏州青、青优四号、矮脚葵翩黑叶白菜、皱叶黑油冬儿、高华青梗
白菜、早生华京、金冠清江白、夏王青梗菜、利丰青梗白菜和杭州油冬儿.这12个品种可作为
在镉轻度污染土壤中种植的安全系数较高的小白菜品种.
关键词小白菜镉污染土壤低积累品种间差异
文章编号1001-9332(2009)03-0736-05中图分类号S634文献标识码A
DifferencesincadmiumabsorptionandaccumulationofBrassicavarietiesoncadmium-pollu-
tedsoi1lCHENYing1,2,LITing-qiang2,YANGXiao-e2,JINYe-fei1(1CollegeofLifeSciences,
ShaoxingCollegeofArtsandSciences,Shaoxing312000,Zhejiang,China;2MinistryofEducation
KeyLaboratoryofEnvironmentalRemediationandEcosystemHealth,CollegeofEnvironmentaland
ResourcesSciences,ZhejiangUniversity,Hangzhou310029,China).-Chin.J.Appl.Ecol.,2009,20
(3):736-740.
Abstract:Apotexperimentwasconductedtostudythedifferencesincadmium(Cd)absorption
andaccumulationofsixtyBrassicavarietiesonthesoilsaddedwithdifferentconcentrationofCd.
TheresultsshowedthatwhenthesoilCdconcentrationwas016mg#kg-1and112mg#kg-1,the
percentageoftestBrassicavarietieswhoseCdcontentexceededtheNationalEdibleStandardwas
8133%and66167%,respectively,suggestingthatBrassicawaseasytobeCd-polluted.Theshoot
CdcontentofalltestvarietieswasbelowtheNationalEdibleStandard,andthebiomassofthevar-i
etiesChanggengbaica,iShanghaiqing,Aijisuzhouqing,Qingyou4,Aijiaokuipianheiyebaica,iZhouye-
heiyoudonger,Gaohuaqinggengbaica,iZaoshenghuajing,Jinguanqingjiangba,iXiawangqinggengca,i
Lifengqinggengbaica,iandHangzhouyoudongerwasnotaffected.These12Brassicavarietiescould
beplantedonthesoilswithlightCdpollution.
Keywords:Brassica;cadmium-pollutedsoi;llowaccumulation;differenceamongvarieties.

我国农田土壤中的重金属含量持续增加[1],在危害人体健康[5-7].降低植物产品重金属含量可以
全国第二次污灌普查中,镉(Cd)污染面积达重金属从两个方面着手:1)降低土壤重金属的浓度和活
[2]
污染超标土壤面积的5619%.由于Cd的生物有性;2)选用在食用部位累积量小的作物品种.在现
效