寒潮天、连阴天、风雪天是塑料大棚蔬菜生产中的三大气象灾害。在生产中，只要管理得当，这三大灾害是可以减轻或避免的。一、寒潮灾害的预防寒潮到来时，棚内温度会很快降低，必须严防冻害的发生。寒潮到来之前，对于一些茄呆类蔬菜要尽量多采果，以利低温下的营养生长和防止 Cold wave days, even cloudy, snow days is the greenhouse vegetable production in the three major meteorological disasters. In production, these three major disasters can be alleviated or avoided as long as they are properly managed. First, the cold wave of disaster prevention cold arrival, the shed temperature will soon be reduced, we must prevent the occurrence of frost damage. Before the arrival of the cold wave, for some eggplant vegetables should try to adopt more fruit, in order to facilitate low-temperature vegetative growth and prevent