不同光质对生菜幼苗生长的影响

Effect of Different Light Qualities on Growth of Lettuce Seedlings

以四季油麦菜为试材,以日光灯(白光)为对照,研究了LED蓝光(B)和红蓝组合光(RB,R∶B=1∶1)对生菜幼苗生长的影响。结果表明:红蓝组合光有利于培育壮苗;红蓝组合光处理的生菜幼苗株高、主根长、茎粗、鲜重、干重和叶面积均显著的高于对照;蓝光处理的株高显著的低于对照;蓝光和红蓝组合光均提高了壮苗指数,且红蓝组合光与对照的差异达显著水平。

Taking lettuce（Lactuca sativa L. var. ＇Sijiyoumaicai＇） as test material, the effect of light spectral energy distribution of light emitting diode （LED） on growth of lettuce seedlings were studied. Blue light and combination of red and blue light （RB） were set as experiment treatments and white light generated by fluorescent lamps was served as control. The results showed that the LEDs combination of red and blue light was more beneficial for lettuce seedlings. Under RB treatment, the plant height, main root length, stem diameter, fresh weight, dry weight and leaf area were significantly higher than that of the control. Cmpared with the control treatment, the plant height under blue light reduced significantly. Seedling index of lettuce seedlings were increased under B and RB treatment, and the seedling index under RB treatment was significantly higher than that of control.