摘要
AredsoilderivedfromQuaternaryredclaywasemployedtostudynutrientleachingwithwoilcolumnsrepackedinlaboratory,TheobjectivewastoidentifytheeffectsoffertilizationpracticesonleachingpatternsandmagnitudesofCa^2+,Mg^2+,K^+,NH4^+,andNO3^-,ThetreatmentswereCK(asacontrol),CaCO3,CaSO4,MgCO3,Ca(H2PO4)2,urea,KCl,andmultiple(amixtureoftheabove-mentionedfertilizers),Thefertilizerswereaddedtothebaresurfaceofthesoilcolumns,andthenthecolumnswereleachedwith120mLdeionizedwaterdailythroughperistalticpumpsoveraperiodof92days.LeachingprocessesofNH4^+,andNO3^-wereonlymeasuredinCK,ured,andmultipletreatmentswhichweredirectlyrelatedtoNleaching,ResultsshowedthatsoleapplicationofCaSO4,andCa(H2PO4)2scarcelyhdanyeffectonthelechinglossesofCa^2+,Mg^2+,andK^+;theapplicationofMgCO3sthimulatedtheleachingofMg^2+;theapplicationofCaCO3promotedtheleachingofCa^2+,Mg^2+andK^+;ureatreatmentalsopromotedtheleachingofK^+andNH4^+,andNO3^-leachingmainlyoccurredatlatestageofleachingprocessinparticular;underKCltreatment,leachingofCa^2+,Mg^2+,andK^+waspromotedtoalargeextent;undermultipletreatment,leachingofCa^2+,Mg^2+,K^+,NH4^+,andNO3^-wasallincreasedandNO3^-wasmainlyleachedattheendofleachingprocessandstillhadatrendofincrease.
出版日期
1998年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
