蔬菜種植區(qū)農用化學品的投入及地下水的硝酸鹽污染——以河北曲周為例.pdf

1、中國農業(yè)大學碩士學位論文蔬菜種植區(qū)農用化學品的投入及地下水的硝酸鹽污染——以河北曲周為例姓名：何英申請學位級別：碩士專業(yè)：生態(tài)學指導教師：李季20030601AbstractFromDecember2001toApril2003，290farmerswereinvestigatedand84136wellsweremonitoredfor3timesinQuzhoucounty，HebeiprovinceThestudyaimedtod

2、eterminethefarmerlevelpesticideuse，fertilizeruseandtheextentofnitratecontaminationingroundwaterinavegetablecultivationareaofQuzhouCountyHebeiProvinceTheresearchresultsareasfollows：1、Thefertilizerusewas16504kg／hm2，andN：P：

3、K=5：2：1Thechemicalfertilizerusewas8459kg／hm‘N，2405kg／hm2P，and403kg／hm2Kandtheuseofmanurewas19t／hmz2)In2002，thetotalpesticideuseWaS2142kg／hm‘inthevegetablecultivation，with1584kg／hm。insecticidesand557kgenm。fungicidesInautu

4、mnFarmersapplied1476kg／hm。pesticideintheirvegetables，withll86kg／hrn‘organophosphates，084kg／hm。cypermethrin，039kg／hm2othertypesofinsecticidesand165kg／hm2fungicides，3)70percentofthetotalpesticideusewasinsecticideuseOrganop

5、hosphatescontributedto64percentofthetotalpesticideuse4119，5％ofsitessurveyedhadgroundwaterN03“NexceedingtheChinapotabledrinkingwaterstandardinFebruary2003，14O％inApril2003，and57％inOctober2002Andthereareconsiderablevariatio

6、nswithinwellsbetweenthesamplingtimes，butfurthermonitoringisrequiredNotonlytheconcentrationsofN03‘Ninshallowgroundwatervaryconsiderablytemporallybutalsospatially5)Nearlyallthesitesthatexceededthepotabledrinkingwaterstanda

7、rdareintheriparianofFuyangRiverwhichhaveamorethan30yearvegetableplantinghistoryBecauseofthis，thesouthvegetablecultivationareaofthecountyismoreseverelypollutedthanthatofthenorthItsuggestsafactthatanitrateloadinthegroundwa