紫色土钾素淋失与利用分析

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1、州南人学硕十学位论文ABSTRACTStudyonLeakagelossandutilizationofPotassiuminPurplesoilDiscipline：PlantnutritionAuthor：MengTaoSupervisor：ShiXiao-junProfessorABSTRACTPotassiumisoneofthethreenecessaryelementsforplants．Therearcimportanteffectsonincreasingyields，improvingq

2、uality，intensifyingstressresistanceofcropsbyreasonablefertilizationofpotassium．Ourcountryisshortofpotassiumresourc∞．The90percentofpotassiumfertilizerdependonimportant．Andthe糊soffarmlandswhicha∞shortofpotassiumarcincreasing．Howtoincreasepotassiumutilizatio

3、nanddecreasethelossofitattractthecommonlyattentionofpeople．Thelossofsoilpotassiumincludesrunofflossandleakageloss．Researchesabouttherunofflossarcexcessive．TheleakagelossofpotassiumwassmdiedinlatosolandredsoilWhileresearchabouttheleakagelossofpotassiuminpu

4、rplesoilwithrice-wheatrotationsystemisinsufficienLInordertoprovidescientificfoundationforthereasonableapplicationofpotassium,andreducelossofitinrice—wheatrotationsystem．Thispaperstudiestheleakageleachingofpotassiuminrice-wheatrotationsysteminthreetypesofp

5、urplesoilbyusingnutrientpercolationpondfacilities．Italsoanalysisestheeffectsofdifferentpotassiumratesonyield，qualityandpotassiumutilizationofficeandwheat．Themainresultsareasfollows：hthegrowthstageofwheat,theleakagelossconcentrationofpotassiumde．clinedwith

6、thegrowthofwheat．hitheearly70days,theleakagelossconcentrationofpotassiumwashigh,thengraduallyreduced．Thechangeregulationabouttheleakagelossconcentrationofpotassiuminneutrasoil，acidicsoiland．calcareoussoilwerethesame．Inthegrowthstageofwheat,theleakagelossc

7、oncentrationofpotassiumwasintherangeof3．0kg／hlu2～8．8kg／hm2，theevemgeWas5．1kg／hm2．Soilpropertiesaffectedtheleakagelossofpotassium．Theleakagelossconcentrationofpotassiumwcre3．Tkg／lml2，3．4kg／hm2and8．4kg／hm2ollaverageinacidicpurplesoil，inneutralpurplesoilandi

8、ncalcareouspurplesoil，respectively．Theleakagelossconcentrationofpotassium111州南人学硕十学付论文ABSTRACTwashigherinacidicpurplesoilthaninneutralandcalcareouspurplesoil．theincreasedegreewas147％，1270．respectively．Theapplication