不同LED光质对绿叶生菜生长的影响

选用半结球生菜和散叶生菜两种绿叶生菜为试材,在其他生长条件相同的情况下,设置3个红蓝光配比,分别为R∶B=4∶1、R∶B=3∶1、R∶B=1∶1,探究不同LED光质对绿叶生菜生长的影响。结果表明:半结球生菜在株高、横径、叶片数、单株鲜重、地上部鲜重方面均随着红光的增多呈上升趋势,并在R∶B=4∶1下达到最大,而地下部鲜重和根冠比在R∶B=1∶1下达到最大;散叶生菜的株高、横径、叶片数、单株鲜重和地上部鲜重均在R∶B=3∶1下达到最大。结论:在本试验设置的3种光配比中,R∶B=4∶1最有利于半结球生菜的生长,R∶B=3∶1最有利于散叶生菜的生长。

Effects of Different Light Quality on Growth of Green Leaf Lettuce

In this paper,half-head lettuce and loose-leaf lettuce were used as material.To explore the effects of different light quality on the growth of green leaf lettuce,we used full spectrum LED as light source with three ratios of red and blue(R∶B=4∶1,R∶B=3∶1,R∶B=1∶1).The results showed that:the half-head lettuce's height,transverse diameter,leaf number,fresh weight per plant and fresh weight above ground were upward with the increase of red light and reached the maximum at R∶B=4∶1 while the fresh weight of the ground and the root-shoot ratio reached the maximum at R∶B=1∶1;The loose-leaf lettuce's height,transverse diameter,leaf number,fresh weight per plant and fresh weight above ground were reached the maximum at R∶B=3∶1.It is concluded that R∶B=4∶1 is the most beneficial to the growth of half-head lettuce,and R∶B=3∶1 is the most beneficial to the growth of loose-leaf lettuce among the three light ratios in the experiment.