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1、西北植物学报,2011,31(7):1434-1440ActaBot.Boreal.2Occident.Sin.①文章编号:100024025(2011)0721434207LED光源对不同品种生菜生长和品质的影响1223211陈文昊,徐志刚,刘晓英,杨杨,王志敏,宋非非(1南京农业大学园艺学院,南京210095;2南京农业大学农学院,南京210095)摘要:以自然光为对照(CK),探讨了LED红光(R)、蓝光(B)和红蓝组合光(RB)对不同品种生菜生长与品质的影响.结果显示:(1)不同光质处理的4个品种生菜的根长、株高及生物量积累等形态及生长指标具有相同的变化规律.(2)植株干鲜重、叶
2、面积及根系活力在R和RB处理下都较大,而在B处理下较小;‘金祥’、‘高华’和‘永荣’的B处理植株可溶性蛋白含量较高;‘联记’、‘金祥’和‘高华’植株的淀粉含量在RB处理下较多,而‘永荣’在R处理下较多;各品种植株可溶性糖含量在R和RB处理下较高,而‘永荣’植株RB处理蔗糖含量较高,其余品种蔗糖含量在R处理下较高;‘金祥’、‘高华’和‘永荣’VC含量在B和RB下较高,‘联记’在RB下较高,各品种在R下均较低;植株总酚含量在各光质处理间无显著差异.(3)‘联记’的硝态氮含量及亚硝酸还原酶对光质敏感,B处理能降低其硝态氮含量及亚硝酸还原酶活性,其他品种的硝态氮含量及亚硝酸还原酶活性在光质处理间
3、无显著差异.研究表明,相同光质下品种间生长无显著差异,而各品种生菜植株在红光和红蓝组合光下生长较好,在红蓝光处理下品质较优,红蓝光是设施栽培生菜的良好光源.关键词:LED光源;生菜;生长;品质中图分类号:Q945.79文献标志码:AEffectofLEDLightSourceontheGrowthandQualityofDifferentLettuceVarieties1223211CHENWen2hao,XUZhi2gang,LIUXiao2ying,YANGYang,WANGZhi2min,SONGFei2fei(1HorticultureCollegeofNanjingAgricu
4、lturalUniversity,Nanjing210095,China;2AgronomyCollegeofNanjingAgriculturalUniversity,Nanjing210095,China)Abstract:Thestudyinvestigatedtheeffectsofgrowthandqualityofdifferentvarietiesoflettuceundertreatments:redLEDs(R),blueLEDs(B)andtheLEDscombinationofredandbluelight(RB)bynaturallightascontrol(CK
5、).Theresultsshowedthateffectoffourlighttreatmentsonrootlength,plantheight,biomassandgrowthoffourvarietiesoflettucehadthesamevariationtrends.Comparedwiththecontrol,plantfreshanddryweight,leafareaandrootactivityofRandRBtreatmentsweregreater,andBtreatmentwassmaller.SolubleproteincontentsinplantsofYo
6、ngrong(YR),Jinxiang(JX),andGaohua(GH)underBwerehigher.StarchcontentsinplantsofLianji(LJ),JX,andGHunderRBwerehigher.WhilestarchandsucrosecontentsinplantofYRunderRwerethehighestandsolublesugarcontentsunderRandRBwerethehighest.VccontentsinplantsofJX,YRandGHunderBandRBwerehigher,whileLJunderRBwashigh
7、erandunderRwaslower.Totalphenolcontentsinplantswerenosignificantdifferenceunderlighttreatments.Nitratecontentandsub2nitritereductaseactivityinplantofLJweresensitivetobluelight.Bluelightcanreducethecontentsofnitrateands
