资源描述：
《长期蔬菜生产试验：化肥施用与堆肥改良土壤的植物生长和施肥比较》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。
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A
2、BSTRACTAstudyofcompostversusconventionally-fertilizedvegetableplotswasconductedfor12yearsinasandyloamsoilnearTruro,NovaScotia.Thefertilitytreatmentshavebeenappliedannuallytosixrotationplotsplantedwithsixtoeightdifferentvegetablecrops.Thecompostsconsistofanimalmanure,foodw
3、aste,yardwasteandstraworracetrackmanurebedding.Thispaperinvestigatedthelastyearofthestudy(2001),whichexaminedlevelsofnutrientsinsoil,leaftissue,theedibleportionoftheplant,andcropyields.Thefreshweightyieldsfromthesixplotsshowedthatthecomposttreatmentresultedinnumerically,b
4、utnotsignificantly,higheryieldsforthecarrots,peppers,onionsandtomatoes,andsignificantlyhigheryieldsforgreenandyellowbeans.CauliflowerandBrusselssproutsyields,however,werehigherinthefertilizer-amendedplot.SoilswithcomposthadhigherpH,CEC,C,NandMehlich-3extractablelevelsofP,
5、Ca,Mg,Mn,ZnandBcomparedwiththefertilizedplots.However,theincreasednutrientsinthecompost-amendedsoildidnotincreasethenutrientsintheleaftissueortheedibleportionoftheplant.Ofthe16elementstested,onlyPandKwerehigherinthefertilizer-amendedplantleaftissue,whilelevelsofPweresigni
6、ficantlyhigherintheedibleportionoftheplant.Thisstudydemonstratedthatthelong-termuseofcompostcanproducesimilaryieldsandelementalanalysisformostcropsincompost-amendedandconventionally-fertilizedsoils.Thispaperreportstheresultsofthe1999and2000croppingyears.Cropyieldresponsew
7、asinconsistentbetweenthetwoamendments;yieldsoftomatoesandbroccolivariedfromyeartoyear.Thefertilizedplots,however,producedhigherbeanyieldsandnumericallyhighercarrotandpepperyields,whilethecompost-amendedplotsproducedhigheronionyieldsinbothyears.。Therewerefewsignificanteffe
8、ctsoftreatmentsonplanttissuecontent;onlyFeandBwerehigherintheorganically-amendedplantleavesin199
