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1、中國農(nóng)業(yè)科學(xué)院碩士學(xué)位論文山東褐土烤煙鉀素營養(yǎng)研究姓名：董建新申請學(xué)位級別：碩士專業(yè)：植物營養(yǎng)學(xué)指導(dǎo)教師：王樹聲梁洪波20050601AbstractThecontentofpotassiumintobaccoleavesiscommonlylowinChinanotablyinnorthChinaThedifferenceinsoilserveastheprimaryfactorcontributingtothelowerpotass

2、iumcontentintobaccoleavesinNorththaninSouth50％ofthetobaccoplantingsoilsinShandongProvince，and70％inHuanghuaiAreaarecinnamonsoil，withnighpHandcarbonatecontentThepotassiumabsorptionoftobaccoplantsincinnamonsoilwasoftenrestr

3、ainedbytheantagonismbetweenCaandKPotexperimentsingreenhouseandfieldexperimentswerecarriedouttostudythesoilmoistureconditionsthefertilizationatdifferentratioofN／KandthetranslocafionanddistributionofpotassiuminridgeThemain

4、resultsareshowedasthefollows1MaintainingthesoftmoistureatdifferentlevelandindifferentstagescoulddefinitelyaffectthetobaccoleafyieldsandpotassiumcouteutThepotexperimentrevealedthatahigllleafyieldcouldbegotwhenmaintainiIlg

5、soilmoistureat80％inthemiddlestageoftobaccogrowthwhilehighKcontentwhenmaintainingthiswaterconditioninthelatterstage，Theexperimentsalsoindicatedhighleafyieldsandpotassiumcontentinthetreatmentofsoilmoistureatthelevelof60％in

6、middlestageand80％inlatterstagerespectively2ThetreatmentwiththeN：K20ratioof1：2couldincreasetheweightoftobaccoleaves，whiledecreasethenicotinelevelundertheconditionsofabundantnitrogenapplicationWhereasthetreatmentwiththeN：K

7、20ratioof1：1couldyieldhighlevelofnicutineandtotalnitrogen3UndertheconditionsofzeropotashapplicationthepotassiumIevelintobaccoleaveswithlessnitrogenfertilizationwashigherthanthatwithmorenitrogenfertilizationWithpotashappl

8、icationandthesameratioofNandK，thehighernitrogenfertilizationcouldresultinhigherKcontentandaccumulationNcouldpromotetheKabsorptionoftobaccoplantsincinnamonsoil4TheincreasingpotassiumcontentandthedecreasingCaandMgcontentwe

9、reobservedwithincreaseinpotashapplicationrates5PotassiumcontantintobaccoleaveswassignificantlynegativelycorrelatedtoCaandMgcontent，andtherewasintensiveantagonismofCaandMgtoKPotassiumcontentintobaccoleaveswaspositivelycor

10、relatedtoactivepotassiumcontentinsoilhighlysignificantly6Withtheapplicationat10and20cmdepth，potassiumtransferredupperdefinitelymorethansidewaysordownwardsInalltreatments，potassiuminsoilabovefertilizationsitereachedthepea

11、klevelattoppingtime7Inthetreatmentof20cmdeepapplicationtheavailablepotassiumcontentin1525cmdeepsoillayerwasconsiderablyhigherthanthatintheothertwotreatmentsThelevelofavailablepotassiumincreasedaRerroseRestageandreachedit

12、speaklevelattoppingtime，inaccordancewiththepotassiumabsorptionruleoftobaccoplantsIntheearlystageofgrowth，therootsoftobaccounderplasticfilmmulchingdevelopedmainlyamongthe020cmsoillayerswhereabundantnutrRionwouldpromotethe

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