利用农膜的颜色可以达到增产的效果,可说是最划算的。红色农膜可以使作物叶片吸收功能增强,生长旺盛,特别是对胡萝卜效果更佳,可使肉质根迅速膨大,提早上市,黄色农膜可以透过黄光、橙色光,用于扁豆栽培可使其荚果肥壮,用于莴苣和芹菜生产可改良株形,延迟食用期,用于黄瓜生产可大幅度提高产量,增产50％—100％;蓝色农 The use of plastic film can achieve the effect of increased production, it can be said is the most cost-effective. Red plastic sheeting can enhance crop leaf absorption, vigorous growth, especially better for carrots, fleshy roots can be swollen, the early market, the yellow plastic sheeting can be yellow, orange light for lentil cultivation can make Its pods are strong, which can be used for lettuce and celery production to improve plant shape and delay the edible period. The cucumber production can greatly increase the yield by 50% -100%