礦質(zhì)營養(yǎng)水平對(duì)碭山酥梨營養(yǎng)生長和果實(shí)品質(zhì)的影響.pdf

1、安徽農(nóng)業(yè)大學(xué)碩士學(xué)位論文礦質(zhì)營養(yǎng)水平對(duì)碭山酥梨營養(yǎng)生長和果實(shí)品質(zhì)的影響姓名：潘海發(fā)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：果樹學(xué)指導(dǎo)教師：徐義流20080607AbstractDangshansupearisamaincultivaranditscultivatedareaaccountsforabout1／4ofthetotalpearareainChinaInrecentyearsthefruitqualityofDangshansupearhas

2、degradedremarkablybecauseoflowerproductioninputsandcarelessmanagementTherearemanyworksreportedaboutcutivationtechniquesforimprovementoffruitqualityandyieldinDangshansupear，butthereareafewresearchesontheDangshansupearbala

3、ncedfertilization，andfeweffectivetechniquesappliedinthepracticalproductionNowinDangshanregionthepearfertilizationalmostdependontheexperienceofgrowerentirelyresultingintheimbalanceofsoilandtreenutrientBasedonthediagnosiso

4、forchardsoilandleafnutrientthefertilizationbyfoliagesprayWasappliedtothetreewithnutrientdeficiencyThedifferentconcentrationofpotassium，boronandmagnesiumwereusedtostudytheeffectofmineralnutrientonthevegetativegrowthandfru

5、itqualityinDanshansupearThemainresultsgainedareasfollows1ThedynamicchangesofthethreemineralelementscontentinDangshansupearleafhadbeentestedThepotassiumcontentinyoungleafWaSatthehighestlevel，thendecreasedsignificantly，and

6、wenttotheminimumintheperiodoffruitmaturityTheboroncontentincreasedwimshootgrowthreachedthehighestlevelatstageofshootceasegrowth，andstartedtodeclineatlast，showingatrendoflowhigh—lowcurve1hetrendofdynamicchangeofmagnesiumc

7、ontentWasalmostthesameasthatoftheboron’S2Afterfoliagesprayingwithdifferentlevelsofpotassium(O2％，04％，and06％KCl)thecontentofpotassiuminleafincreaSedinthetreatmentconcentrationof02％to04％Properpotassiumfertilizerwouldrestrai

8、nedtheshootgrowth，increasedthesingleleafarea，theweightper100leavesandthecontentofchlorophyll，andenhancedthecontentofsolublesugar，vitamineCandthepulpfirmnessofDangshansupearsignificantlyInconsiderationoftreevigour，fruitqu

9、alityandproductioncoststhefertilizationbyfoliagesprayingwithO4％ofKCltwoorthreetimesinthefruitswellingperiod(JunetoAugust)wouldgainedthebestresultasthetreeWasiIlpotaSsiumdeftciency3BoronfertilizationbyfoliagesprayingatO2％

10、or03％ofNa28407mDangshansupearcouldincreasedtheboroncontentiIlleafAppropriateboronapplicationwouldpromotetheshootgrowth，enlargethesin百eleafarea，theweightper100leavesandthecontentofchlorophyll，andincreasethesolublesugar，th