华北地区雨少风多,严重降低棚室的透光率,造成蔬菜减产、采收推迟。就此问题,本文提出了如下办法,在实践中效果不错。所需材料是一条长绳和几团棉布条,绳长约为棚宽加上棚高长度的2倍。以清除规格为宽13米、高3米 Rain less wind in North China, a serious reduction of greenhouse light transmission, resulting in reduced production of vegetables, harvest delayed. In this issue, this paper proposes the following solutions, the effect is good in practice. The required material is a long rope and a few groups of cotton strips, rope length is about shed plus 2 times the length of the shed. To clear the specification is 13 meters wide and 3 meters high