一、利用农膜的颜色达到增产效果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,用于豆角类可使荚果肥壮;用于莴苣和芹菜可改良株型,延迟食用期;用于黄瓜可大幅度提高产量,增产50%～100%。兰色农膜用于韭菜和胡萝卜,可提高品质,提 First, the use of plastic sheeting color to achieve the effect of production Red plastic sheeting can enhance the absorption of crop leaves, vigorous growth, especially better for carrots, fleshy roots can be swollen, the early market. Yellow plastic sheeting can be yellow, orange light, for the beans can make the pods strong; for lettuce and celery can be improved plant type, delayed edible period; for cucumber can greatly improve the yield, an increase of 50% to 100% . Blue plastic film for leeks and carrots, can improve the quality, mention