冬春季节,采用塑料大棚栽培的蔬菜经常遇到阴、冷、风、雪、雨等恶劣天气的侵袭,管理不善往往会造成巨大经济损失。其应对措施是:1.阴冷天气冬季或早春,遇到持续低温、寒流天气,苇苫、草苫子等覆盖物要适当晚揭。揭苫后要注意观察畦温变化,如果畦温稍有下降,应随揭随盖,畦温稍有回升,可以在下午2时以前把覆盖物重新盖好。为加强夜间保温,可以适当增加苇苫片 In winter and spring, vegetables grown in plastic shed often encounter adverse weather such as overcast, cold, wind, snow and rain. Poor management often results in huge economic losses. The countermeasures are: 1. Cold weather in winter or early spring, encountered sustained low temperature, cold weather, reed, grass, grass and other coverings should be properly late exposures. After exposing to pay attention to observe the temperature change, if the temperature drops slightly, should be exposed with the lid, the temperature rise slightly, you can cover before 2 pm to re-cover. To enhance the insulation at night, you can increase the reed tablets appropriate