苹果果实套袋是目前生产优质高档苹果 ,提高果品档次的重要栽培措施。就红色苹果而言 ,套袋苹果除袋后促进了果皮花青素的形成 ,改变了果皮内显色色素的比例 ,改善了花青素的显色背景 ,从而极大地增进了果实的着色 ;同时套袋果较利于贮藏 ,果实农药残留量大为降低。但套袋后果 Apple fruit bagging is the current production of high-quality high-grade apples, fruit grade to improve the important cultivation measures. In the case of red apples, bagging apples promoted the formation of anthocyanins in the pericarp, changed the proportion of the chromogenic pigments in the pericarp and improved the color developing background of the anthocyanins, which greatly enhanced the coloring of the fruits. At the same time bagging fruit is more conducive to storage, fruit pesticide residues are greatly reduced. But bagging consequences