不同光质对韭菜生长及光合特性的影响

以791雪韭和紫根红两个韭菜品种为试验材料，设红光、蓝光、红/蓝（3/1）、红/蓝（7/1）4个处理，以白光为对照，研究不同光质对韭菜生长及光合特性的影响。结果表明：红/蓝（7/1）处理下韭菜株高、茎粗、叶宽及干鲜质量比均显著高于其他处理|叶绿素总量、叶绿素a/b值及类胡萝卜素含量均以红光处理最高|光合速率、气孔导度、蒸腾速率以及Fv/Fm、Fv/Fo均以红/蓝（7/1）处理最高，而蓝光处理下有较高的胞间CO2浓度、ФPSⅡ和qP。说明红/蓝（7/1）光质有利于提高韭菜叶片的光合作用，促进植株生长，提高产量。

Effects of Light Qualities on Growth and Photosynthetic Characteristics of Chinese Chive

This paper studied the effects of different light qualities on the growth and photosynthetic characteristics of Chinese chive(Allium tuberosum Rottl.ex Spr.).Taking‘791 xuejiu’and‘Zigenhong’ Chinese chive as material,red light,blue light,red/blue(3/1)and red/blue(7/1)light generated by light-emitting diode were applied.And white light generated by fluorescent lamps was used as control.The results showed that the height,stem diameter,blade width and value of dry weight to fresh weight were the highest under red/blue(7/1)light.The contents of chlorophyll(a+b),carotenoid and chlorophyll(a/b)ratio were the highest under red light treatment.The photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(E),maximal photochemical efficiency of PSⅡ(Fv/Fm)and Fv/Fo were the biggest under red/blue(7/1)light.Whereas intercellular CO2 concentration(Ci),quantum yield of PSⅡ(ФPSⅡ)and value of qP were the highest under blue light.It is conclude that the Pn of Chinese chive were significantly increased under red/blue(7/1)light,thus the plant growth and yield were also significantly increased.