高氯酸盐与铬复合污染对水稻幼苗生长的影响.pdf

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1、农业环境科学学报2010，29(2)：223-228JournalofAgro—EnvironmentScience高氯酸盐与铬复合污染对水稻幼苗生长的影响杨杰峰1,2,3，陈桂葵1，一，黎华寿1,2(1．华南农业大学农业部生态农业重点开放实验室，广州510642；2．广东省高等学校农业生态与农村环境重点实验室，广州510642；3．广东外语艺术职业学院，广州510640)摘要：通过营养液沙培盆栽试验。研究了水稻幼苗的根长、株高和鲜重对高氯酸盐(ClO；)、六价铬(c一)及其复合污染(ClO；+c一

2、)胁迫的响应。结果表明，随着污染物处理浓度的提高，cl俄、c一和CI畎+C阳寸水稻幼苗主要生长指标根长、株高和鲜重的抑制作用越明显，呈现出明显的浓度撤应关系；在同一浓度下，cl伍、C一和Cl哦+cr6时水稻幼苗根长、株高和鲜重的抑制率呈明显的时间一效应关系，处理时间越长，抑制率越高；复合污染对水稻生长的抑制效应大于其中任一污染物在同浓度条件下的单一污染的影响，且随着浓度和时间的增加，抑制作用也越明显；复合污染对水稻幼苗生长的交互作用类型因处理时间和浓度组合的不同而更趋复杂。关键词：高氯酸盐；铬；复合

3、污染；水稻；交互作用中图分类号：X503．231文献标志码：A文章编号：1672—2043(2010)02-0223-06EffectoftheCombinedPollutionofPerchlorateandHexavalentChromiumonRiceSeedlingGrowthYANGJie-fen912J,CHENGui-kuiltLIHua-shou啦(1．KeyLaboratoryofEcologicalA鲥culture，MinistryofAgricultureofthePeopl

4、e'sRepublicofChina,SouthChinaAgriculturalUnivemity，Guangzhou510642，China；2．KeyLaboratoryofAgroecologyandRuralEnvironmentofGuangdongReguhrHigherEducationInstitutions，Guangzhou510642，China；3．GuangdongTeachersCoflegeofForeignLanguageandArts，GuangTkou51064

5、0，China)Abstraet：Apotexperimentwithsandcultivatingwasconductedtostudythestresseffectsofdifferentconcentrationlevelsofporchlomte(ClOi)andhexavalentchromium(Or“)aswellastlleircombinati叩(ClO；+C一)uponriceseedlinggrowth．Resultsshowedthataninerea船inCIO；，c^an

6、dCIm+C—concentrationsinhibitedtherootlength，plantheiglltandfreshweightofriceseedlingsignificantlywhichshoweddose．ef-fectrelationship．Atthe咖econcentrationleveltheinhibitoryrateofriceseedlinggrowthsuchasrootlength。plantheightandfreshweightincreagedgradua

7、llyasexposuretimewereraised．whichshowedtime墙ctrelationship．，nleinhibitionoftheCIO；+CI—combinedtreatmentwerehigherthanthatofindividualC10iorC—treatment．AndasCIO；+Cr“concentrationsandexposuretimewereraised，theinhibitoryrateincreasedobviously．。11Ieinterac

8、tionsbetweenperchlomteandhexavalentchromiumhadcomplicatedinfluencesonitsinhibitoryrateofriceseedlinggrowthundertheconditionofthebinarymixture，whichweredependentontheirconcentrationcombinationsandexposuretime．Keywords：perchlorates；hexava