‘红富士’苹果营养诊断技术分析

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1、‘红富士’苹果营养诊断技术研究N3>NI>N2，howeverbaggingnumber,singleplantyieldandsolublesugarcomemhadtheoppositeresult(N2>NI>N3)；thesolublesolidscontentfrombigtosmallWaSNI>N2>N3；itCallbedrewaconclusionthatN2treatmentWaSbeneficialtothephysiologicalindicatorsof‘RedFuji’apple．Thea

2、ctivityofSODandCATinannualcycleshowaSsinglepeakcurve，theacti嘶ofPODastwopeakscurveunderN1treatment；theactivityofSODshowastwopeakscurve，theactivityofPODandCATassinglepeakcurveunderN2treatment；underN3treatmenttheactivityofSOD、POD、CATallshowastwopeakscurve；thepeakv

3、alueoftheactivityofthesethreekindsofenzymesallappearatnewshootgrowingstageandearlyfruitswellingstage．3、Theeffectofgrowthandabsorption,distributionandutilizationofDN-UreaappliedindifferentNPproportionon3-year-old‘RedFuji’apples印lingby1N—labeledtracermethodshowed

4、thatP1，P2，P3levelswere170，255，340Kg．hm-2，descendingordereffectoftotaldryweightindifferentNFproportiontreatmenton‘RedFuji’applesaplingsWaSN1P2，N1P3，N2P1，N1PI，N2P3，N3P2，N2P2，N3P3，N1P3，eachtreatmentWaSsignificantlydifferent；descendingordereffectofChlorophyllSPADav

5、luesWaSN1P2，N2P2，NIP3，N2P1，N1P1，N3P2，N2P3，N3P1，N3P3，eachtreatmentWaSalsosignificantlydifferent；whichtheeffectofN1P2fertilizationproportionontotaldryweightandchlorophyllWaSbest．TranspirationrateindifferentNPproportiontreatmentWaSsignificantlydifferent；N2P3ratioW

6、aSmaximumof2．24mmoV(m2．s)，N1P1、N1P2ratioWaSminimumof1．43mmol／(m2．s)；PhotosyntheticratebyN1P3WaSmaximumof13．46umol／(mz．s)，N3P3ratioWaSminimumof9．76um01．m-Z．s～．DifferentNPproportiontreatmentdidnotchangebetweenNdfforderandpartitionruleof1Nofvarioustreeorgans．The1N

7、—ureautilizationofNlP2indifferentNPproportiontreatmentismaximumupto13．6％．Insummary,N1P2indifferentNPproportiontreatmentisoptimal．4、Theeffectsofsprayingdifferentcalciumfertilizeronthe‘RedFuji’applefruitqualityandmineralelememcontentshowthatSPADvariationisconsist

8、entinthesameplaysiologicalperiod，Experimentson12-year-old‘RedFuji’appletreeweredesignedtoexplorewhicheachtreatmentallisgreaterthanCK，andthedifferencesamongtreatmentsreacheda