不同波长LED光源对生菜生长和品质的影响

Growth and quality of lettuce exposed to LED lighting with different wavelengths

为了给设施园艺中推广应用LED光源提供依据,研究了660 nm红光(R)、450 nm蓝光(B)以及由红光、蓝光和300 nm紫外光(UV-B)组成的配比光(R∶B=4∶1、R∶B=8∶1、R∶B∶UV-B=20∶5∶1)对生菜生长发育和品质的影响。结果表明:与对照荧光灯相比,红光显著提高地上生物量的积累,有利于产量的提高,但降低维生素C和粗蛋白质含量;蓝光具有明显矮化植物的效果,同时提高生菜的维生素C和粗蛋白质含量;复合光质(R∶B∶UV-B=20∶5∶1)显著降低生菜的叶面积,提高维生素C、粗蛋白质和粗纤维含量。

This study dealt with the effect of light emitting diodes （LED）, including the red light （660 nm） （R）, blue （450 nm） （B）, and a mixed red/blue/uhraviolet-B （UV-B, 300 nm） （R ： B=4 ： 1, R ： B=8 ： 1 and R ： B ： UV-B = 20 ： 5 ： 1 ）, on growth and quality of lettuce, aiming to provide data for LED light application in protected horticulture. Compared to fluorescent lamp （ CK）, the red light significantly aceumulationed the aboveground biomass and improved the yield, but decreased vitamin C and crude protein contents. The blue light exerted a dwarfing effect on the stem and active effects on vitamin C and crude protein contents. The mixed light of R/B/UV-B = 20 ： 5 ： 1 significantly reduced leaf area, and improved the vitamin C, crude protein and crude fiber contents.