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1、河北農(nóng)業(yè)大學(xué)碩士學(xué)位論文植物生長(zhǎng)延緩劑和氮素應(yīng)用對(duì)草坪草的影響研究姓名：范光宇申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：作物栽培學(xué)與耕作學(xué)指導(dǎo)教師：邊秀舉20090610TheInfluenceofApplyingNitrogenPlantGrowthRetardantonTurfgrassPostgraduate:FanguangyuMaj:CropCultivationFarmingSystemSupervis:BianxiujuAbstractTh

2、erangeofturfapplicationwasverywide.Suchassptsturfwithhighmaintenancelevelnamentalturfwithdlemaintenancelevelecoturfwithlowmaintenancelevel.Plantgrowthretardantscouldreduceturfgrowthimproveturfqualitybutvarietiesenvironme

3、ntwouldaffectPGRseffect.ThetwoyearsreplicatedexperimentchosecoldseasonturfgrassKentuckybluegrass(PoapratensisL.)asthetestmaterialsinvestigatingtheeffectofplantgrowthretardant(Trinexapac–ethylPaclobutrazole)nitrogenontheg

4、rowthofturfgrass.TheactionmechanismofthetwoplantgrowthretardanttoinhibitthegrowthofturfgrassistoreduceturfgrassinternodescellelongationbyinhibitingbiosynthesisofGibberellicacid.Thestudyinvestigatedtheeffectofplantgrowthr

5、etardantindifferentnitrogenlevelstotheverticalgrowthofplantclippingsyieldleafwidthleafthicknesschlophyllcontentwaterconsumptionsolubleproteinsolublesugar.Themainresultsaresummarizedasfollows:PlantgrowthretardaⅠntsreduced

6、verticalgrowthbyclippingsyieldbyamongthefournitrogenlevelsTrinexapac–ethylreducedverticalgrowthby30.1%reducedclippingsyieldby16.5%Paclobutrazolereducedverticalgrowthby41.2%reducedclippingsyieldby25.8%.Sothecostdecreaseda

7、sthemowingfrequencyreduced.PlantgrowthretardantsreducedwaterconsumptionasⅡantitranspirantsamongthefournitrogenlevelsTrinexapac–ethylreducedwaterby3.1%Paclobutrazolereducedwaterby6.1%.PGRsnotonlysavingwatersavingcostbutal

8、soreducedthelossratiooffertilizerpesticidethepollutionreducedasthelossratiodecreased.PlantgrowthretardantsincreasedthecontentofchlophyllamongthefourⅢnitrogenlevelsTrinexapac–ethylincreasedthecontentby7.7%Paclobutrazolein

9、creasedthecontentby10.6%.SoPGRswouldimproveturfgreencolwithoutnitrogenous.ⅣTrinexapac–ethylmadeleafwideningby10.7%thickeningby22.1%Paclobutrazolemadeleafwideningby11.4%thickeningby24.9%.Trinexapac–ethylincreasedsolublepr

10、oteincontentby11.7%solublesugarcontentby13.9%Paclobutrazoleincreasedsolubleproteincontentby11.8%solublesugarcontentby15.5%.PGRsmadeturfresistancestrongerreducedtheamountofinsecticidefungicidesoPGRswouldsavemoneyreducepol

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