Plant protective cover

The invention relates to transparent polymer material plant protection coverage layer, comprising at least a transmission spectrum modifying layer; the minimum to 350nm the transmission of ultraviolet; And with a acting according to treating culture plant the photosynthesis and a morphogenesis of claim a plant protection coverage layer, is the adjusting the 350nm-750nm the transmission of visible light area, to improve a plant yield condition. The coverage layer further - comprising and minimum is higher than 750nm the transmission spectrum modifying layer of infrared device. Via speed the green light and yellow light of the belt transmission, and blue light and nm wave length ratio of the luminous through hole 2∶3 the steering, is the adjusting the 350nm-750nm the transmission of visible light area. The coverage layer optimizes device in yield conditions of the lower coverage layer cultivating, thus claims a plant growth and performance of moving reinforcing.