所谓一膜三用法就是指：使用同一农膜，在同年生产的蔬菜上连续使用3次的一种降低生产成本，提高经济效益的周年蔬菜生产方法。目前遵化市西三里乡已利用到不同品种的韭菜和早春蔬菜，并已获得成效。其具体做法是：选择土壤肥沃，距水源近的地块，采用大小畦种植样式，即大畦两 The so-called one film three uses refers to: use the same agricultural film, in the same year the production of vegetables on the use of 3 times a continuous reduction of production costs and improve economic efficiency of the annual vegetable production methods. At present, Zansanli Township, Zunhua City, has utilized different varieties of leeks and early spring vegetables and has achieved results. The specific approach is: to choose the fertile soil, water near the plots, the size of the planting patterns, that is,