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1、THELONG-TERMVEGETABLEPRODUCTIONEXPERIMENT:PLANTGROWTHANDSOILFERTILITYCOMPARISONSBETWEENFERTILIZERANDCOMPOST-AMENDEDSOILSByP.R.WarmanDepartmentofEnvironmentalSciences,NovaScotiaAgriculturalCollege,Truro,N.S.,CanadaPrinter-friendlyversionhere加拿大Truro,N.SNovaScotia农业学院环境科学系ABSTRACTA
2、studyofcompostversusconventionally-fertilizedvegetableplotswasconductedfor12yearsinasandyloamsoilnearTruro,NovaScotia.Thefertilitytreatmentshavebeenappliedannuallytosixrotationplotsplantedwithsixtoeightdifferentvegetablecrops.Thecompostsconsistofanimalmanure,foodwaste,yardwastean
3、dstraworracetrackmanurebedding.Thispaperinvestigatedthelastyearofthestudy(2001),whichexaminedlevelsofnutrientsinsoil,leaftissue,theedibleportionoftheplant,andcropyields.Thefreshweightyieldsfromthesixplotsshowedthatthecomposttreatmentresultedinnumerically,butnotsignificantly,highe
4、ryieldsforthecarrots,peppers,onionsandtomatoes,andsignificantlyhigheryieldsforgreenandyellowbeans.CauliflowerandBrusselssproutsyields,however,werehigherinthefertilizer-amendedplot.SoilswithcomposthadhigherpH,CEC,C,NandMehlich-3extractablelevelsofP,Ca,Mg,Mn,ZnandBcomparedwiththefe
5、rtilizedplots.However,theincreasednutrientsinthecompost-amendedsoildidnotincreasethenutrientsintheleaftissueortheedibleportionoftheplant.Ofthe16elementstested,onlyPandKwerehigherinthefertilizer-amendedplantleaftissue,whilelevelsofPweresignificantlyhigherintheedibleportionofthepla
6、nt.Thisstudydemonstratedthatthelong-termuseofcompostcanproducesimilaryieldsandelementalanalysisformostcropsincompost-amendedandconventionally-fertilizedsoils.Thispaperreportstheresultsofthe1999and2000croppingyears.Cropyieldresponsewasinconsistentbetweenthetwoamendments;yieldsofto
7、matoesandbroccolivariedfromyeartoyear.Thefertilizedplots,however,producedhigherbeanyieldsandnumericallyhighercarrotandpepperyields,whilethecompost-amendedplotsproducedhigheronionyieldsinbothyears.。Therewerefewsignificanteffectsoftreatmentsonplanttissuecontent;onlyFeandBwerehigher
8、intheorganically-amendedplantleavesin199
