简介:Elovich,parabolicdiffusion,powerfunctionandexponentialequationswereusedtodescribeKdesorptionkineticsof12soilsinaconstantelectricfieldofelectro-ultrafiltration(EUF),ResultsshowedthattheElovich,parabolicdiffusionandpowerfunctionequationscoulddescribeKdesorptionkineticswellowingtotheirhighcorrelationcoefficientsandlowstandarderrors;buttheexponentialequationwasnotsuitabletobeusedinthisstudyduetoitsrelativelylowcorrelationcoefficientsandrelativelyhighstandarderrors.Thisworkestablishedsuccessfullytherelationshipsbetweentheconstants(slopeorintercept)ofkineticequationsandthebarleyresponsestoKfertilizerinthemultiple-sitefieldexperimentsandK-supplyingstatusofsoilsk,theconstantsofElovich,parabolicdiffusionandpowerfunctionequationswereverysignificantlyorsignificantlycorrelatedtothesoilavailableK,relativeyieldofbarleyandKuptakeofbarleyinNPplot.ItwassuggestedthatthekineticequationconstantscouldbeusedtoestimateK-supplyingpowerofsoils.