鉀肥用量和基追肥比例對烤煙產(chǎn)、質(zhì)量的影響.pdf

1、江西農(nóng)業(yè)大學(xué)碩士學(xué)位論文鉀肥用量和基追肥比例對烤煙產(chǎn)、質(zhì)量的影響姓名：鐘曉蘭申請學(xué)位級別：碩士專業(yè)：土壤學(xué)指導(dǎo)教師：張德遠2003.6.1碩士學(xué)位論文鉀肥用量和基追肥比例對烤煙產(chǎn)、質(zhì)量的影響AbstractAfieldtrialwasconductedintheloessfieldwithallaverageorabovefertilityleveltostudytheeffectsofpotassiumapplicationamoun

2、tonthegrowthyieldandqualityoffluecuredtobaccoin2001Onthebasisof2001’Sexperiment，effectofKapplicationamountandsupplementalproportiononyield，qualityandaccumulationlawofdrymatterandpotassiumwerestudiedin2002Theaimofthetrial

3、swastoascertainthesuitableKapplicationtechniqueswhichadaptedtofluecuredtobaccoproductionandincreaseKcontentofcuredleavesTheresultsshowedasfollowing：Raisingpotassiumapplicationamountcouldacceleratetobaccogrowthandperfecti

4、tsbiologicalpropertiesUndertheconditionofthisexperiment，theyield，middleanduppergradeleafaveragepricevalueandeconomicprofitsincreasedwithraisingKapplicationamountuntiltheamountreachedat315kg／hm2，thenalltheindexwouldcomedo

5、wnwhenKapplicationamountexceeded315keghm2Rangingfrom0to375kg／hm：Kapplicationamount，KcontentofcuredleafandplantsharplyincreasedwhileCa＆MgcontentsignificantlydecreasedPotassiumusingratiowasin143％～30294，sharplydecreasingwit

6、hKapplicationamountraisedInthisexperiment，potassiumbenefitedtobaccovaluemorethanyieldbytheaddingpercentofKfertilizerandthe315kg／hm2KapplicationamountbehaviorbestinallpropertiesThegrowth，yieldandvalueoffluecuredtobaccower

7、eaffectednotonlybyKapplicationamount，butalsobythesupplementalproportionofpotassiumfertilizerInthefieldoft30megkgavailableKcontent，thehighestcurdleavesyieldandvalueWasgottenwith270kg／hm2Kfertilizerapplied，thesecondWasgott

8、enby225kg／Ilm2Kapplicationamount，andthelowestwas315kg／hm2AmongthethreeKapplicationamount，applying225kg／hm2KfertilizercouldgainthehighestuppergradeleafbuttheiraveragepriceswerenosignificantUndermes啪eamountofKapplicationth

9、ehighestcuredleavesyieldWasobtainedwith70％KfertilizerasthesupplementalDifferentiatedbyKsupplementalproportiontheorderofcuredleavesyieldwas70％50％30％，whiletheorderofuppergradeleafaveragepriceandvalueWas70％50％30％Intheexperi

10、ment，thepotassiumcontentofcuredleafwassharplyincreasedbytheraisingsupplementalproportionofKfertilizer(FO99”)，andwiththeKapplicationamountraising，thecontentoftotalNandnicotinemarkedlydecreasedTherefore，inthesoilof130megkg