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1、萬方數(shù)據(jù)山東農(nóng)業(yè)大學(xué)碩士學(xué)位論文EffectsofDifferentPhotoperiodandDifferentLightQualityonthePhysiologicalCharacteristicandQualityinStrawberryAbstractLight--emittingdiode(LED)isasolid--statesemiconductordevicesanditCanbedirectlyputelectricityintolight．LEDlightingsystemshaveseveraluniqueadvantages
2、overtraditionallighting，includingtheabilitytomaintainusefullightoutputforyearswithoutreplacement，spectralcompositionpure，lowconsumption，theabilityofenvironmentalprotection．Sotheyarewidelyusedinthestudyofplantgrowth．Ledlightsourceasthemostpromisinganddevelopmentprospectinthefiel
3、dofartificiallightsourceforfuturefactilities，usingitsregulationofplantmorphogenesisandplantgrowthisanimportanttechnologyinthefieldofgreenhousecultivation．NowmoststudiesoflightqualitiesofstrawberriesusingsunlighttransmittanceofsimilarfiltermembraneandtheyCall’taccuratequantitati
4、vemodulationspectralenergydistribution，lightunitandlightintensityarenotunified，SOaffecttheaccuracyofresearch．ThestudymainlyexplorestheLEDaslightsourceofphotoperiodandlightqualitiesonphotosyntheticcharacteristic，fruitproductionandqualityofstrawberry,inordertoprovidereferenceofph
5、otoperiodandlightqualitiesenvironmentalregulationofstrawberryinthefacilitycultivation．ThestudyuseLEDaslightsourcesettwotrials，taking‘miaoxiangNo．7’strawberryasmaterial，photoperiodicstudysetfourtreatment，8h．d～，12h．d～，16h．d。1and20h．d‘1；lightqualitytreatmentincludingfullredlight，f
6、ullbluelight，fullyellowlight，fullwhitelight，red／blue／yellow(7／2／1)，red／blue(7／2)lightgeneratedbylightemitcingdiode(LED)wasappliedtoaccuratelymodulatewitllwhitelightgeneratedascontr01．Theresultsshowedthat：1．Photoperiodhadsignificanteffectongrowthanddevelopmentofstrawberry．Planth
7、eight，leafarea,rootactivity,dryandfreshweightofplantunder16h‘d一1weresuperiortoothertreatments．TheresultshowedthatextendphotoperiodCaneffectivelypromotethegrowthofstrawberry．2．Photoperiodhaddifferenteffectonphotosyntheticcharacteristicofstrawberry．Photosyntheticparameters(R，正，Gs
8、)andpigmentcontentswereincreasedatfirstandthendecrease
