论文部分内容阅读
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,若能加强管理则会减少经济损失。1、阴冷天气冬季或早春,遇到持续低温、寒流天气,苇毛苫、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,可以适当增加苇毛苫片数,使覆盖物加厚;苇毛苫不足时,加盖草苫子、生产上常见有不少菜农在阴冷天气整日甚至连续数日不揭覆盖物的现象,这样会使秧苗衰弱,待天气回暖后揭苫见光时,易造成萎蔫死亡(俗称“闪苗”)。
In spring and winter, vegetables grown in plastic shed often encounter adverse weather such as yin, cold, wind, snow, rain and the like, and if management can be strengthened, the economic loss will be reduced. 1, the cold weather in winter or early spring, encountered sustained low temperature, cold weather, reed hair 苫, grass 苫 son and other covering should be properly late exposure. After exposing to pay attention to observe the temperature changes, if the temperature drops slightly, should be exposed with the lid; temperature rise slightly, you can cover before 2 pm to re-cover. In order to enhance the insulation during the night, the number of reed hairs can be properly increased to make the cover thicker. When the reed hay is insufficient, the hay is stamped, and many vegetable farmers are often found in cold weather for days or even days in a row Covering the phenomenon, this will weaken the seedlings, until the weather is warm and then exposed to see the light, easily lead to wilting death (commonly known as “flash seedlings”).