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1、不同施氮處理對中華壽桃氮素吸收分配與產(chǎn)量品質(zhì)的影響增大果實體積，從而提高了果實單果重。15關鍵詞：桃；N；吸收；分配；產(chǎn)量；品質(zhì)2山東農(nóng)業(yè)大學碩士學位論文AbstractNitrogenwasakeyfactorforfurityieldandqulity.Basedontherequirementofhighqualityfruit,itwasimportanttorationalizenitrogenapplication.Theexperimentusingthe1515stableisotopeN-labelledwascarriedoutfrom
2、2009to2010.ThecharacteristicsofNabsorption,distributionandutilizationatdifferentgrowthstageswhenfertilizeindefferentphasesandmethod,andtheeffectofdifferentnitrogentreatmentonyieldandqualityundertheconditionoffieldcultivationbyusingthirteen-year-oldpeach(prunuspersical.CV)werestudi
3、ed.Themainresultswereasfollows:1、Afieldexperimentwascarriedouttoevaluatetheeffectsofdifferentfertilizeramount(compostN:P:K=16:8:20，0-2250kg/ha)onyield,qualityandsoilmineralnitrogen.Theresultshowedthatallthetreatmentsincreasedinorganicnitrogenaccumulationinsoilandchlorophyllcontent
4、.Onbalance,thetreatmentof1500kg/hashowedoptimalperformanceincreasedthegrowthofindividualfruitby20.8%,yieldby26.4%,solublesolidby1%vs.1515controls.UsingNtracertechniquetoevaluatethecharacteristicsofNabsorption,distributionwhenfertilizebeforefruitexpandingstage.Twoweeksaftersuppling
5、nitrogen,151515Nwasfoundinleaf,andtheNcontentincreasedasthetime.TheNcontentoffruitand15leafwassimilaratthestageoffruitexpanding.HoweverleafandfruittookupNH4-Nfaster1515whenNH4-NandNO3-Nsuppliedsimultaneously.Inthefollowingyear,theNdff%ofleafandfruitwasobservablyhigherinthetreatmen
6、toffertilizebeforefruitexpandingstagethaninspingbeforesprout.Inconclusion,rationalfertilizerbeforfruitexpandingcouldincreaseyieldandquality,andalsowasgoodforflowering、fruitsettingandgrowth.2、Atthestageofharvest,weparsedthewholeplantthatwasfertilizedindefferentphases(beforefruitexp
7、anding、beforesproutandinneonatalbranchrapidgrowthperiod).We15foundthatthelargestamountofNinnew-growthorgans(leaves,branchesandfruit)wasinthetreatmentoffruitexpandingstage;Ndistributionrateinperennialbranchesandrootswasabout40-56%,inleafandnew-growthbrancheswas35%,andinfruitwas6-20
8、%.Inthe15treatmentofinsummerthela
