Using a winter wheat cultivar Yunong 186 as material and natural lighting as control,the effects of supplemental illumination at night on endogenous plant hormones content,photosynthetic characteristics,and grain yield were investigated by additional artificial lighting for 2(T1),4(T2)and6h(T3)at night.The results showed that,compared with the control treatment,the treatment of supplemental illumination at night could improve the area of flag leaf,increase the chlorophyll content and photosynthetic rate of ...