不同條件下作物秸稈養(yǎng)分釋放規(guī)律的研究.pdf

1、東北農(nóng)業(yè)大學(xué)碩士學(xué)位論文不同條件下作物秸稈養(yǎng)分釋放規(guī)律的研究姓名：鄭丹申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：農(nóng)業(yè)資源與環(huán)境；土壤學(xué)指導(dǎo)教師：遲鳳琴20120620東北農(nóng)業(yè)大學(xué)農(nóng)學(xué)碩士學(xué)位論文TheNutrientReleasingRegularityofCropStalksunderDifferentConditionsAbstractCropstalkiSavaluablerenewableorganicresourcesitCanimprovea

2、ndamelioratesoilfertilityandincreasecropyieldsafterstalkreturningStalkreturninghasalreadybecomethemostdirectandeffectivewaytoimprovesoilfertilityTheexperimentwascarriedoutintheAgriculturaltechnologypromotioncenterofShuan

3、gchengandboxplantedfieldofHeilongjiangAcademyofAgriculturalSciencesonMay26，2010andJune8，2011NetbagmethodWaSusedtodeterminedecompositionrate，nutrientcharacteristicsofcropstalks，andregulationorganicmatterunderdifferentinco

4、rporationmethodintothefieldAtthesametimedeterminationtheimpactonsoilmicrobialbiomasscarbonandnitrogenandselftoxicityandhissenseofeffectontheaftercroppingSothatwecanfindprovidethebaSisfortherationalapplicationofstrawandso

5、ilimprovementBasedonthedataanalysistheresultofthestudyindicatedthat：1Theresultsshowedthatafter120daysbiomassdecompositionrateofmaizestalksindifferentdepthswerethedepthof10cmdepthof5cmdepthof2cm，organiccarbondecomposition

6、rateofthethreetreatmentsshowedthesametrendandgraduallyincreasedwithtimepaSsingOrganiccarbondecompositionrateofdepth10cm，5cmand2cmwereabout60％after120days，respectivelyPandKdecompositionratewerefasterthanN，andthereleaSingr

7、ateofN，PandKwere633％～658％，869％～905％，828％～907％，respectively；whilethedepthof10cmanddepthof5cmsignificantlyfasterthanthedepthof2cminthereleaSingofK，thedepthof10cmiSmoresuitableformaizestalksdecomposition2Decompositionofmaiz

8、estalkandsoybeanstalkunderdifferentlengthsaftertwoyears，biomassdecompositionrateofthefirstyearWaSabout55％biomassdecompositionrateofmaizestalkwasmorethansoybeanstalk；biomassdecompositionratewas77％488％inthesecondyearsoybea

9、nstalkwasmorethanmaizestalkDecompositionofmaizestalkinlength2cmwasthefastestsoybeanstalkwasinlength6cmOrganiccarbondecompositionofmaizestalkandsoybeanstalkwereabout88％underdifferentlengths，thereleasingrateofmaizestalkswe

10、re2cm6cml0cmsoybeanstalkswere6cm10cm2cmNreleaserateofstalksreturningintosoilwere63％～80％underdifferentlengthsPandKreleaseratewereabout90％indicatedthatthereleaserateofstalkreturningdidnotsignificantlydifferencebetweendiffe

11、rentlengthsSostalkreturninginlength2crnrecommendedwasbetterthanotherlengthandsoybeanstalkWaS6cminagriculturalproduction3BiomaSsdecompositionrateofmaizestemsandleaveswere535％、641％respectivelyafter120daysNreleaSerateofstem