Abstract
We already reported that the seasonal changes in the spectral composition of solar radiation, particularly blue light and green light, might be one of the important factors in controlling the flowering of long-day plants and short-day plants at the temperate latitudes. So, we manufactured two types of photo-selective sheet. One type[N.S.Blue-sheet] works to become big the B-ratio and another type[N.S.Red-sheet] works to become small the B-ratio. N.S.Blue-sheet promoted the flowering in short-day plants and N.S.Red-sheet promoted the flowering in long-day plants.
