保護(hù)地菜田氮素去向及氮素平衡研究.pdf

1、分類號S3學(xué)校代碼10129UDC635.1學(xué)號2010202039保護(hù)地菜田氮素去向及氮素平衡研究StudyonNitrogenFateBalanceinVegetableFieldunderGreenhouse申請人：郭守春學(xué)科門類：農(nóng)學(xué)學(xué)科專業(yè)：蔬菜學(xué)研究方向：蔬菜育種與生物技術(shù)指導(dǎo)教師：石嶺教授鄒國元研究員論文提交時(shí)間：二〇一三年六月StudyonNitrogenFateBalanceinVegetableFieldunderG

2、reenhouseAbstractTheProtectedvegetablefieldshavesomeacteristicsoflargequantityoffertilizerthehighstrengthofluseTheeffectonbalancedsupplyutilizationofnitrogenfertilizerindifferentfertilizationpatternsbyconditionoflongterm

3、continuouscultivation.IndertoclarifytheeffectofdifferentfertilizerapplicationtodifferentfertilizationmethodsthestudyaimtothreeplantofCauliflowerinBeijingfangshanresearchthefateofnitrogenyieldqualityofvegetablethroughplan

4、tingthreecrops(Cauliflower)experimentbydesigningsignalapplicationofganicfertilizerreducenitrogenfertilizationslowreleasenitrogenfertilizerstrawotheragriculturalmeasures.1.Inthenitrogenreduction30%thevegetableproductionha

5、sremainedstablebutthereisanobviouseffectinreducingnitrateaccumulatednitrogenlossesinsoilTheproductionofreducingnitrogenfertilizerisnodifferentcomparewithconventionalfertilizationatthesametimetheefficiencyofnitrogenuseofr

6、educenitrogenfertilizationofCauliflowerishigher3%thenitratecontentreduced47.4mg.kg1comparewithconventionalfertilizationVctendtohighTheresearchresultsfromthreestubbleCauliflowershowthatNlossrateofreductionnitrogenfertiliz

7、ationreduced11.3%thanconventionalfertilization.2.Usingstrawreturncouldinreducingnitrateaccumulatednitrogenlossesinsoil.TheyieldofCauliflowerofconventionalstraw(7500kg.hm2)arenodifferentcomparewithconventionalfertilizatio

8、n.ThenitrogenuserateofconventionalstrawtendtohighdecreasethenitratecontentofCauliflowerbutincreaseVc.TheresearchresultsfromthreeCauliflowershowthatnitrogenaccumulationinsoil(060cm)ofConventionalstrawless489.6kg.hm2thanCo

9、nventionalfertilizationlossrateoffertilizernitrogenreducedabove27.5%comparedwiththeConventionalfertilization.3.Slowcontrolfertilizerinconditionofnitrogenreductionabout5%64%fieldupto12.5%.Atthesametimedecreasingthenitrate