不同LED光源对黄瓜幼苗质量的影响  

Effect of Different Light Emitting Diode Sources on the Quatity of Cucumber Seedlings

作　　者：段奇珍[1] 曲梅[1] 高丽红[1] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100193

出　　处：《北方园艺》2010年第15期125-128,共4页Northern Horticulture

基　　金：中央高校基本科研业务费专项资金资助项目(2009JS52);"十一五"科技支撑计划资助项目(2008BADA6B03)

摘　　要：根据LED光源特性以及植物幼苗对光质的反应,设计LED蓝红光比例分别为3∶1和5∶1,以白光LED为对照,研究了不同LED光源对黄瓜(津育5号)幼苗质量的影响。结果表明:白光(CK)照射下幼苗的最大真叶面积、地上部鲜(干)重、全株干重、生长速率和壮苗指数均显著高于蓝红光比例为3∶1和5∶1的处理;根冠比以蓝红光比为5∶1的处理最大;蓝红光比为3∶1时叶绿素a/b比值最大,比CK高45.5%;蓝红光比例为3∶1和5∶1的处理蒸腾速率分别比CK高15%和25%。说明白光LED有利于培育黄瓜壮苗,而增大蓝红光比例有利于同化物向地下部分配。The effects of the ratios of blue light to red light generated（B/R）by blue,red light emitting diodes（LED）on the qualities of cucumber ＇JinYu 5th＇ seedlings were studied and responses were compared with seedlings grown under white light generated by white LED.The ratios were designed 3∶1 and 5∶1,and the treatments were based on the characteristics of the LED light source and the responses of plant seedlings to light qualities.The results showed that：the maximum true leaf area、fresh（dry）weight upground、dry weight of the seedlings、the growth rate and seedling index of the seedlings were significantly higher under white light than under the light of B/R at 5∶1 and 3∶1.R/T or Chl a/b was highest when the seedlings grown under the light of B/R at 5∶1 or at 3∶1,and Chl a/b was 45.5%higher when the seedlings grown under the light of B/R at 3∶1 than under white light.The transpiriation rate of the seedlings grown under the light of B/R at 3∶1 and 5∶1 was 15% and 25% higher separately than the seedlings grown under white light.The conclusion was that white light was in favor of cultivating cucumber seedlings and higher ratio of blue to red light was propitious to transporting the assimilated matter to underground.

关 键 词：LED 黄瓜 幼苗 

分 类 号：S642.2[农业科学—蔬菜学]