红富士苹果在我省的栽培面积越来越大。但普遍存在着着色程度差,红富士不红的现象,影响其商品率,所以必须加强着色管理。 1、对于准备高接换头的果园,最好选用国光品种,不仅着色系数高,而且产量也高。如果砧树为元帅、红星,着色指数虽然较高,但产量 Red Fuji apple growing area in our province is growing. However, there is a common phenomenon that the degree of coloring is poor and the red Fuji is not red, which will affect the rate of its products. Therefore, shading management must be strengthened. 1, for the preparation of high replacement orchard, it is best to use Guoguang varieties, not only high coloring coefficient, but also high yield. If the anvil tree is Marshal, Red Star, the coloration index is higher, but the yield