早春灾害性天气的大棚管理每年的２～３月份。人们习惯称为早春。此时利用塑料大棚进行蔬菜生产，常会遇到寒流、阴灭、风雪等灾害性天气的危害。因此，加强防护是保证大棚蔬菜安全生长的关键，必须特别注意以下四点。一、风雪袭击：刮大风下大雪，要及时将棚上积雪清扫干... Greenhouses in early spring disastrous weather management from February to March each year. People used to be called early spring. At this point the use of plastic greenhouses for vegetable production, often encounter cold, shade, snow and other disastrous weather hazards. Therefore, to strengthen protection is to ensure the safety of greenhouse vegetable growth, we must pay special attention to the following four points. First, the snow attack: blowing snow under the wind, to promptly shed the snow swept dry ...