双膜棉在陕西省已试验、示范种植多年，为了使其顺利进入大田；少出偏差，应充分认识气候资源，因此，有必要对双膜棉进一步商榷。１双膜棉的优、缺点双膜棉是指在地膜覆盖的基础上再加盖一层小拱棚的植棉方式。其优点是：早发、争早熟，延长有效结铃期，主要解决春季气温... Double-membrane cotton in Shaanxi Province has been tested, planting for many years demonstration, in order to make it smoothly into the field; less deviation, climate resources should be fully aware of, therefore, it is necessary further discussion of double-film cotton. A double-membrane cotton, the advantages and disadvantages of double-film cotton refers to the basis of the plastic film covered with a small shed shed cotton way. Its advantages are: early onset, striving for precocious puberty, prolong the effective period of bell, mainly to solve the spring temperature ...