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1、Agriculture,EcosystemsandEnvironment112(2006)391402www.elsevier.com/locate/ageeEnvironmentalassessmentofsmall-scalevegetablefarmingsystemsinperi-urbanareasoftheYangtzeRiverDeltaRegion,ChinaBiaoHuanga,XuezhengShia,*,DongshengYua,IngridO¨bornb,bcaKarinBlomba¨ck,TimothyF.Pagella,HongjieWang,acWe
2、ixiaSun,FergusL.SinclairaStateKeyLaboratoryofSoilandSustainableAgriculture,InstituteofSoilScience,TheChineseAcademyofSciences,71E.BeijingRoad,P.O.Box821,Nanjing210008,People’sRepublicofChinabDepartmentofSoilScience,TheSwedishUniversityofAgriculturalSciences,P.O.Box7014,SE-75007Uppsala,Swedenc
3、SchoolofAgriculturalandForestSciences(SAFS),UniversityofWales,Bangor,LL572UWBangor,UKReceived22October2004;receivedinrevisedform17August2005;accepted30August2005Availableonline2November2005AbstractThereisgrowingconcernaboutfoodsafetyandenvironmentalcontaminationintherapidlyexpandingperi-urban
4、interfaceinAsia.Here,wepresentanintegratedstudyoffarmingpracticesandthequalityofwater,sediments,soilsandagriculturalproductsinsmall-scalevegetablefarmingsystemsintwocontrastingperi-urbanareaswithdifferentlevelsofindustrialdevelopmentintheYangtzeRiverDeltaRegionofChina.Applicationoflargeamount
5、sofcowmanuretovegetablesinNanjing,avegetable-basedperi-urbanarea,hadcausedanaccumulationofN,P,Cu,ZnandavailableCdinsoil.ThisresultedinhighCdinsomevegetablesandhighconcentrationsofNandPinsurfacewater.BecauseofashorterhistoryofvegetableproductioninWuxi,anindustrializedperi-urbanarea,theaccumula
6、tionofNandPinsoilswasless,buthighavailableCdduetolowsoilpHassociatedwithapplicationoflargeamountsofinorganicfertilizershadresultedinhighCdinsomevegetables.HeavymetalpollutionintheWuxiareamainlycamefromatmosphericdepositionanddischargeofeffluentfromfactoriesandwashigherthaninthelessindustrializ
7、edareainNanjing.Developmentanddisseminationofstrategiesformoreefficientuseoffertilizersinvegetablefarmingcouldbenefitbothfarmprofitabilityandtheenvironmentandshouldbecoupledwithtreatmentofmunicipalwastebeforedischargeandcontroloffactoryemissions
