目前,普通薄膜已在农作物生产中得到广泛应用,并获得显著经济效益。有色膜是较透明膜独具性能的新膜种,国内厂家生产的有黑、银灰、乳白、绿、紫、蓝、红色等多种颜色,是由聚乙烯树脂或聚氯乙烯树脂中加入一定比例的颜色母料吹塑而成。银灰色膜由于对光有较强的反射作用,在许多农作物上都可应用。在果树行间覆盖银灰色膜,阳光被反射到果树的叶片上,能增加树冠下部的光照强度,有利下部叶的光合作用及下部果实着色。据江苏农科院园艺所覆盖温州蜜桔的试验结果证明,银灰色膜覆盖除增加桔林下部光照、增加土壤湿度 At present, ordinary films have been widely used in crop production, and obtain significant economic benefits. Colored film is more transparent film unique performance of the new film species, the domestic manufacturers of black, silver, white, green, purple, blue, red and other colors, is a polyethylene resin or polyvinyl chloride resin by adding a certain Proportion of the color masterbatch blow molding. Silver gray film because of the strong reflection of light, in many crops can be applied. Covering the silver-gray film between rows of fruit trees, sunlight is reflected on the leaves of fruit trees, increasing the light intensity at the lower part of the canopy, favoring the photosynthesis of the lower leaves and the coloring of the lower fruit. According to Jiangsu Academy of Agricultural Sciences horticultural Wenzhou tangerine test results show that, in addition to silver-gray film to cover the lower part of orange light, increase soil moisture