近年来,塑料大棚在花卉栽培上被广泛应用,但塑料大棚的保温性能是有限的。因此,要根据不同类型的花卉,合理使用塑料大棚。需要在冷室越冬的花卉,如盆栽的茶花、杜鹃、棕竹、含笑、朱顶红等进棚后要注意晴天通风降温,不可贪图高温,如果打破了休眠,进入生长状态,花卉的抗寒能力将大大降低,容易受冻。需要在高温温室越冬的花卉,竹芋类、变叶木、仙人掌类、凤梨类、巴西铁、发财树、龙血树、热带兰等喜高温花卉,首先,可在大棚外加保温材料覆盖,阻止夜间热量散失。晴天的夜间此法极为有效。其次,大棚内再套一个简易棚,即双层棚。两层塑料薄膜间距离最好在10厘米左右,中间的空气导热系数较小,保温的效果较好,棚内温度较稳定。第三,增温。用电热或锅炉加温、能量消耗较大,代价较高。可将这两项措施结合,在特别低温时和雨雪天短时间应用。此类花卉 In recent years, plastic greenhouses are widely used in flower cultivation, but the plastic greenhouse insulation performance is limited. Therefore, according to different types of flowers, the rational use of plastic greenhouses. Need to overwintering flowers in the cold room, such as potted camellia, rhododendron, brown bamboo, smiling, amaryllis into the shed after the sunny day should pay attention to ventilation and cooling, can not covet the high temperature, if broken dormancy, into the growth state, Greatly reduced, easily affected by the cold. Winter flowers, arrowroot, variegated wood, cactus, pineapple, Brazil iron, fortune tree, dracaena, tropical blue and other hi-temperature flowers need to be overwintered in high temperature greenhouses. First, they can be covered with insulation material in the greenhouse to prevent the night Loss of heat. This method is very effective on sunny days. Second, a simple shed in the shed and then set up, that double shed. The distance between the two plastic films is preferably about 10 centimeters, the middle of the air thermal conductivity is smaller, better insulation effect, greenhouse temperature is more stable. Third, warming. Electric heating or boiler heating, energy consumption, higher cost. These two measures can be combined at a particularly low temperature and rain and snow days a short time application. Such flowers