College of Horticulture Science and Engineering，Shandong Agricultural University，State Key Laboratory of Crop Biology，Agriculture Ministry Key laboratory of Horticultural Crop Biology，Taian 271018，Shandong，China
Abstract：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．
