Effects of Additional Light with Different Qualities on Photosynthetic Rate and Growth of Zantedeschia aethiopica (L.)Spreng under Natural Light Condition

During the night(18:00～24:00),Zantedeschia aethiopica were added light 0,2,4,6h with different qualities [blue:(475±5)nm,yellow:(585±5)nm,red:(660±5)nm,white:complex wave] everyday after natural light when it was just burgeon.After 38d,photosynthetic rates of Z.aethiopica from high to low were 0 h2 h4 h6 h under blue,red and white light,and 0 h2 h6 h4 h under yellow light.The growths were best under yellow light for 6h and blue light for 2h.The effects of red light for 2h and white light for 4h were next, while effects of white light for 6h and blue light for 6h were worst.