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1、生态学杂志ChineseJournalofEcology2007,26(8):1193-1198长期灌溉含多环芳烃污水对稻田土壤酶活性与*微生物种群数量的影响1,21**31,2111张晶张惠文丛峰张勤李新宇苏振成张成刚123(中国科学院沈阳应用生态研究所,沈阳110016;中国科学院研究生院,北京100039;沈阳市大东区环境保护局,沈阳110042)摘要以沈抚污水灌区为例,研究了长期灌溉含多环芳烃(PAHs)污水对稻田土壤酶活性、微生物种群数量的影响。结果表明,灌区稻田土壤PAHs含量在3191
2、5~636218Lg#-1kg。长期污水灌溉导致稻田土壤PAHs含量严重超过环境标准。随清水连续灌溉年限的增加,土壤PAHs总量不同程度降低直至低于土壤PAHs环境质量标准。相关性分析表明,在目前污染程度下,灌区稻田3大土壤微生物类群和主要功能群的种群数量主要受土壤理化性质的影响,受PAHs含量影响不明显。土壤全氮含量与细菌数量呈极显著正相关(P<0101)。土壤酶活性受到土壤养分和PAHs污染的双重影响,土壤有机碳和全磷含量分别与脱氢酶、多酚氧化酶和脲酶活性呈极显著正相关(P<0101),PAHs
3、含量分别与脱氢酶和脲酶活性呈极显著正相关(P<0101),与多酚氧化酶活性呈显著正相关(P<0105)。关键词污灌;多环芳烃;土壤酶活性;微生物种群中图分类号X172文献标识码A文章编号1000-4890(2007)08-1193-06Effectsoflong2termPAHs2containingwastewaterirrigationonlowlandricesoilenzyme1,213activitiesandmicrobialpopulations.ZHANGJing,ZHANGHui2
4、wen,CONGFeng,1,21111ZHANGQin,LIXin2yu,SUZhen2cheng,ZHANGCheng2gang(InstituteofApplied2Ecology,ChineseAcademyofSciences,Shenyang110016,China;GraduateUniversityof3ChineseAcademyofSciences,Beijing100039,China;EnvironmentalProtectionBureauofDadongDistrict,
5、Shenyang110042,China).ChineseJournalofEcology,2007,26(8):1193-1198.Abstract:AcasestudywasconductedintheShenfuirrigationareatoinvestigatetheeffectsoflong2termPAHs2containingwastewaterirrigationontheactivitiesofdehydrogenase,polyphenoloxidaseandureaseand
6、onthemicrobialpopulationsinlowlandricesoi.lTheresultsshowedthatafteralong2termPAHs2containingwastewaterirrigation,thePAHscontentintestsoilranged-1from31915to636218Lg#kg,whichsurpassedtheenvironmentalstandardseriously.Withtheincreasingyearoffreshwaterir
7、rigation,soilPAHscontentdecreasedtodifferentdegrees,uptothelevelbelowenvironmentalstandard.Correlationanalysisindicatedthatthequantitiesofsoilmicrobialandmainfunctionalpopulationsweremainlyaffectedbysoilphysicalandchemicalproperties,andlessaffectedbyso
8、ilPAHsconten.tThenumbersofsoilbacteriahadverysignifi2cantlypositivecorrelationswithsoiltotalN,whilethetestenzymeactivitiesweresignificantlypositivelycorrelatedwiththecontentsofsoilorganicC,totalPandPAHs.Keywords:wastewaterirrigation;pol
