地膜覆盖栽培已在各地推广应用。但怎样更充分地利用地膜?河北省永年县农业局的经验是:前一、二茬作拱棚覆盖,后一茬作地面覆盖。即先作小拱棚覆盖西瓜,待晚霜结束后拆除拱架。将膜打孔就地覆盖地面。或者移至其它夏菜如瓜、豆类蔬菜地作地面覆盖之用。另一种作法是在二月中旬 Film mulching cultivation has been popularized and applied all over the country. However, how to make better use of plastic film? Yongnian County, Hebei Province, the experience of the Bureau of Agriculture is: the first and second cropping cover for the arch, the latter crop for ground cover. That is, for the first small shed covered watermelon, until the night after the demolition of the arch frame. Punch the membrane in place to cover the ground. Or move to other summer vegetables such as melons, beans and vegetables for ground cover purposes. Another approach is in mid-February