地处辽南的金州,冬季最冷的1月平均气温在-5.8—-6.8℃,极端最低温度可达-16.9℃。太阳高度角低、日照时间短、光照强度弱,在这科条件下,如何解决光照不足和温度偏低的问题,我们采用银色聚酯膜反光幕来改善日光温室的光照,收到良好效果。我们的做法是在跨度为5.85米,长72米,无柱、无后坡的砖石塑料结构的温室中,在其后墙走道前方悬挂2米高、20米长的银色聚酯膜为反光材料(如图1)。太阳光就可被银色膜反射到弱光区,使之光照强 Located in southern Liaoning Golden State, the coldest January in January the average temperature -5.8--6.8 ℃, extreme minimum temperature up to -16.9 ℃. The solar elevation angle is low, the sunshine time is short, the light intensity is weak. Under this condition, how to solve the problem of insufficient light and low temperature, we use the silver polyester film reflective screen to improve the sunlight greenhouse and receive good results. Our approach is to hang a 2-meter-high, 20-meter-long silver polyester film in front of the back wall walkway in a greenhouse of 5.85 meters long and 72 meters long without pillar, Material (Figure 1). The sunlight can be reflected by the silver film to the weak light so that the light is strong