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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
2、系ABSTRACTAstudyofcompostversusconventionally-fertilizedvegetableplotswasconductedfor12yearsinasandyloamsoilnearTruro,NovaScotia.Thefertilitytreatmentshavebeenappliedannuallytosixrotationplotsplantedwithsixtoeightdifferentvegetablecrops.Thecompostsconsistofanimalmanure,f
3、oodwaste,yardwasteandstraworracetrackmanurebedding.Thispaperinvestigatedthelastyearofthestudy(2001),whichexaminedlevelsofnutrientsinsoil,leaftissue,theedibleportionoftheplant,andcropyields.Thefreshweightyieldsfromthesixplotsshowedthatthecomposttreatmentresultedinnumeric
4、ally,butnotsignificantly,higheryieldsforthecarrots,peppers,onionsandtomatoes,andsignificantlyhigheryieldsforgreenandyellowbeans.CauliflowerandBrusselssproutsyields,however,werehigherinthefertilizer-amendedplot.SoilswithcomposthadhigherpH,CEC,C,NandMehlich-3extractablele
5、velsofP,Ca,Mg,Mn,ZnandBcomparedwiththefertilizedplots.However,theincreasednutrientsinthecompost-amendedsoildidnotincreasethenutrientsintheleaftissueortheedibleportionoftheplant.Ofthe16elementstested,onlyPandKwerehigherinthefertilizer-amendedplantleaftissue,whilelevelsof
6、Pweresignificantlyhigherintheedibleportionoftheplant.Thisstudydemonstratedthatthelong-termuseofcompostcanproducesimilaryieldsandelementalanalysisformostcropsincompost-amendedandconventionally-fertilizedsoils.Thispaperreportstheresultsofthe1999and2000croppingyears.Cropyi
7、eldresponsewasinconsistentbetweenthetwoamendments;yieldsoftomatoesandbroccolivariedfromyeartoyear.Thefertilizedplots,however,producedhigherbeanyieldsandnumericallyhighercarrotandpepperyields,whilethecompost-amendedplotsproducedhigheronionyieldsinbothyears.。Therewerefews
8、ignificanteffectsoftreatmentsonplanttissuecontent;onlyFeandBwerehigherintheorganically-amendedplantleavesin199
