Taking three different sweet pepper varieties as test materials,and sun shade net to stimulate

artificial low light environment,this paper studied the effect of low light on the growth of different sweet

pepper varieties.The results showed that after 85 % low light treatment,the bud stage,flowering period,the

door pepper fruit setting period,two-layer pepper fruit setting period,harvesting period and defeat seedling

stage of the three varieties were obviously delayed,compared with the control.The fresh weight of single

plant leaves decreased 43.97 %-77.26 % and the number of leaves per plant reduced 12.95 %-63.74 %.The longer

the low light treatment last,the greater the amount of reduced.Among these 3 tested varieties,J04 has the

stronger resistence to low light.Under low light conditions,its plant height,stalk thickness,number of single

plant leaves and fresh weight of single plant leaves were kept in a high value,and its number of fruit

setting was also the highest.