冬暖大棚蔬菜气象灾害的预防雨雪天、寒潮天、连阴天是冬暖大棚蔬菜的三大灾害气象，每年都会出现。而实践表明，只要措施得当，这三大灾害是可以减轻或避免的。（一）雨雪灾害的预防雨雪天气如果出现在白天且已到拉草苫时间，应在下雨雪之前将草苫卷起来，用塑料薄膜盖严... Winter warm greenhouse vegetable weather disaster prevention rain and snow, cold days, and even cloudy is winter warm greenhouse vegetables three disaster meteorological, appear every year. Practice shows that as long as the measures are properly implemented, these three major disasters can be alleviated or avoided. (A) the prevention of rain and snow disasters rain and snow weather if it appears in the daytime and has been pulling grass 苫 time, it should be rolled before the rain grass, covered with plastic film ...