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时间:2020-03-27
《重庆市农业面源污染影响因子的系统分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2009,28(5):999—1004JournalofAgro—EnvironmentScience重庆市农业面源污染影响因子的系统分析杨志敏,一,陈玉成,一,魏世强,一,赵中金,王莉玮(1.西南大学资源环境学院,重庆400716;2.重庆市农业资源与环境重点实验室,重庆400716;3.重庆市农业环境监测站,重庆400020)摘要:采用系统分析与数学分析方法,探讨了重庆市农业面源污染(NPSP)影响因子的作用大小、作用方向和作用方式,划分重庆市农业面源污染防治的类型。结果表明,主导因子是代表畜牧
2、业的粪便承载系数、代表种植业的耕地面积和代表农民生活的人均收入,其中粪便承载系数显示抑制作用,而耕地面积和人均收入则促进面源污染的加重,且它们均以直接作用的形式影响农业面源污染。重庆市农业面源污染的防治可分为压力一响应较大型、压力大而响应小型、压力小而响应大型和压力一响应较小型等。关键词:农业面源污染;影响因子;系统分析中图分类号:X502文献标志码:A文章编号:1672—2043(2009)05—0999—06SystemsAnalysisofFactorsAfectingAgriculturalNon-Poin
3、tSourcePollutioninChongqingYANGZhi-min,CHENYu-cheng,WEIShi-qiang。,ZHA0Zhong~in,WANGLi—wei(1.CollegeofResources&Environment,SouthwestUniversity,Chongqing400716,China;2.ChongqingKeyLabofAgrieuhuralResources&Environment,Chongqing400716,China;3.ChongqingStationofA
4、griculturalEnvironmentMonitoring,Chongqing400020,China)Abstract:ThedischargeamountsofCOD,BOD5,totalnitrogen(TN)andtotalphosphor(TP)wasaccountedbythelistanalysisfromthe8sourcesofagriculturalnon—pointsourcepollution(NPSP)suchaschemicalinorganicfertilizers,organi
5、cfertilizers,cropsstraw,stockbreed-ing,aquieuhure,domesticsewage,domesticwastesandsoilerosionin39districts(counties)inChongqing.Subsequently,thesystemsanaly-sisandmathematicalanalysiswereconductedtodeterminethemagnitude,directionandmodeoffactorsaffectingNPSP,t
6、oclassifythepre—ventionandcuretypesofNPSPinChongqing.TheresultsshowedthatthedominantfactorsweretheloadingcoefficientofdejectionfLCD)referringtotheinfluenceofstockbreeding,theplantationarea(PA)referringtotheinfluenceofcropproductionandthemeanrevenueoffarmer(MRF
7、)referringtotheinfluenceoffarmerslivingleve1.Ofwhich。LCDcouldrestraintheNPSPwhilePAandMRFreversed.Further—more,themannerofLCD,PAandMRFweredirectfunction.The39districts(counties)inChongqingwereclassifiedinto4typessuchasseveritybothpressureandresponse,severityof
8、pressurebutlightnessofresponse,lightnessofpressurebutseverityofresponse,andlightnessbothpressureandresponsebasedonloadingofNPSP,providingthescientificevidencetopreventandcureNPSP.K
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