大棚瓜菜冬春季节时常遭遇寒流、连阴、雨雪、大风等灾害的侵袭,应及时采取相应的管理措施。一、降雪天管理措施遇到降雪,要先盖一层苇毛苫,再盖一层稻草苫,雪停后,立即清除积雪,防止积雪融化,确保覆盖物干燥,以利保温。天气开始转晴时,慢慢揭去覆盖物,以利透进阳光。若连续降雪后天气骤晴时,更不可猛然全部揭去覆盖物,应陆续揭去以防“闪苗”。揭后要注意观察作物变化,出 Greenhouse vegetables often encounter winter and spring cold, even yin, rain and snow, wind and other disasters, the invasion should promptly take the appropriate management measures. First, snowfall management measures Snowfall, we must first cover a layer of reed hair, and then covered with a layer of straw 苫, the snow immediately after the snow cleared to prevent snow melting, to ensure that the cover is dry, to facilitate insulation. When the weather began to clear, slowly remove the cover, in order to facilitate the sun. If the weather after a row of snow suddenly clear, but not all the cover suddenly removed, should be removed in order to prevent “flash seedlings ”. After exposing the crop should pay attention to changes, out