三種土壤下小麥水肥交互效應(yīng)比較研究.pdf

1、Y10570S墨密級(jí)：論文編號(hào)：中國(guó)農(nóng)業(yè)科學(xué)院學(xué)位論文三種土壤下小麥水肥交互效應(yīng)比較研究ComparativeStudiesonInteractionEffectsBetweenWaterandFertilizerstoWheatUnderThreeSoils碩士研究生：劉明指導(dǎo)教師：逢煥成研究員申請(qǐng)學(xué)位類別：農(nóng)學(xué)碩士專業(yè)：作物栽培學(xué)與耕作學(xué)研究方向：水肥高效利用培養(yǎng)單位：農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所研究生院提交日期2007年6月Abstr

2、actThisstudycomparestheinteractioneffectofwaternitrogenphosphorusandpotassium(WNPK)towheatgrow，photosynthesischaracteractivityofleafenzyme，yieldandnutrientabsorptioncharacterunderdifferentsoilwithpottedplantmethodThethre

3、ekindofsoilisfluroaquicsoilfromFengqiuHenanprovince，loessialsoilfromChangwuShanxiprovinceandredsoilfromQiyangHunanprovincewhichformedunderdifferentheatandwatergradientWeCallconcludethat：(1)Theresultsfromfluro—aquicsoilsh

4、owthat：thejointeffectofWNPKwerenotsomuchtowheatgrowthatseedlingpenod，afterthatWPKpromotewheatgrowthsignificantly，enhancephotosynthesis，soleadtobetterplantheightandleafareaWaterstresscouldimproveMDAcontentsignificantly，bu

5、tthesynergisticeffectofSOD，PODandCATCalldecreaseMDAaccumulationAmountofwaterandphosphoruswereimportanttowheatyieldRationalapplyingratioofWNPcombinedwhensoilwaterwasdeficientandrationalapplyingratioofNPKcombinedwhensoilwa

6、terwassufficientweretheguaranteeofhi曲productionThenitrogenandphosphoruscontentinplantbecominghighbutthepotassiumcontentdeceascswithhigherPinputWNPhavegoodsynergisticeffect(2)TheresultsfromloessialsoilshowthatWaterandnitr

7、ogenistwoimportantfactorsaffectingwheatgrowthWaterdeficientwasthekeyfactorwhichaffectsphotosynthesisPhosphoruscouldenhanceleafphotosynthesissignificantly，drymaterialaccumulationandresistanceofplantsunderwatelstressThesub

8、stituteeffectofwaterandphosphOIUShadbeeninevidencewhentherewerenowaterstressInthestudy，SODandPODassortedwitheachotherverywellunderadversity，MDAcontenthad900dcorrelationwithleafprotectionenzymeThefirstfactoraffectingwheat

9、yieldwaswaterandthenWasPthepositiveinteractioneffectofNPKtoyieldWasbaseoncertainwatercontentDifferentwaterandfertilizerratiohadbiggereffectonyieldNPKcouldimprovewheatyieldwhenthewatersupplyweregoodThetrendofyieldWas：midd

10、lelevelNhighlevelNlowlevelNthehigherPinputcouldimproveplanttotalNandtotalPcontent，buttheeffecttoKwerenotSegular(3)nleresultsfromredsoilshowthat：duetothespecialcharacterofredsoil，waterandovermuchPKcontenthadlesspromotinge

11、ffecttowheatyield，butKhadoppositeeffectWaterwerethemainfactoraffectingphotosynthesisNPKhadsyne呼sticeffectonphotosynthesisunderwaterstress，butitwouldchangetoantagonisticeffectundernowaterstressconditionTheactivityofleafpr

12、otectionenzymewouldriseandMDAwoulddecreasewithWaterandnutritioncontentrising，SOitwouldimproveresistanceofwheatThelevelofPcontentanddistributioncoulddirectlyaffectprotectionenzymeactivityandMDAcontentInthisstudyusingmoreN