Evaluating Effectiveness of Species Selection and Grass ：品种选择和草效果评价

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1、SoilMicrobiologicalActivitiesinVegetativeBufferStripsandTheirAssociationwithHerbicideDegradationByC.H.Lin,R.N.Lerch,R.J.Kremer,H.E.Garrett,U.RanjithandM.F.GeorgeRecentStudiesRegardingHerbicidesandHealth,EcologicalandSocial&EconomicImpactsPublicHeathImpactThemenlivingintheMidMissouri,ascomparedtooth

2、erU.S.urbanareas,tendtohavepoorerspermqualityandlowerspermcounts.(Dr.Swanetal.2003)Thelowerspermqualityandcountsstronglyassociatedwiththehigherherbicidesresiduelevels(alachlor,atrazine)intheirurinesamples.(Dr.Swanetal.2003;CenterforDiseaseControlandPrevention2003)(Noneofthemeninthestudyworkedatorli

3、vednexttofarms)EcologicalImpactFrogsexposedtoatrazineinthereservoirnearMidweststatesdevelopedreproductivedeformity(hemaphroditic;mixturesofovariesandtestes)(Dr.Hayesetal.2003).Social&EconomicImpactTocomplydrinkwaterregulation,St.LouisCountyestimatedthecostsofcompliancefortheirfivedrinkingwatertreat

4、mentplantsbytheinstallationofgranularactivatedcarbonatacapitalcostof$164million,withoperationandmaintenancecostsof$7millionperyear.OurMissionTooptimizetheriparianbufferdesignsinagroforestrysystemstoreducetheherbicidetransportfromnearbyagriculturallandsbeforetheyreachthereservoirsordrinkingwatersour

5、cesTodeveloptherecommendations(speciesselectionandbiodegradationagents)andcost-effectivemanagementplanstoenhancedthedegradationoftrappedherbicideswithinbuffersEffectivenessofGrassBufferDesignsinReducingHerbicidesTransportinSurfaceRunoff(UniversityofMissouriBradfordResearchCenter)AtrazineTransportin

6、SurfaceRunoffMetolachlorTransportinSurfaceRunoffGlyphosateTransportinSurfaceRunoffFurtherConsiderationArobustbufferdesignneedstorapidlydegradethedeposited&interceptedherbicidesbeforetheyhaveachancetobereleasedtosurfaceandsubsurfaceflow.SiteofLysimeterProjectatUniversityofMissouriCorrelationCoeffici

7、ent=0.58p=0.015MicrobialBiomassCvs.AtrazineDegradationinSoilsContourBuffersWatershedProjectControl-traditionalcorn-soybeanrotationGrassContourBuffer-redtop,bromegrassandbirdfoottrefoilAgroforestryContourBuf