推广良种嫁接繁殖选用良种、优树、优穗进行嫁接，不仅可提早3—5年开花结果，还可矮化树体，便于管理，提高单株及单位面积产量。1.就地选择优良单株。优良单株的标准是：在同一立地条件下，表现高产、稳产，早期结实，成龄树株产不低于20公斤，树冠投影面积每平方米产量不低 Popularize the fine varieties of grafting Breeding breeding, You Shu, You Sui grafting, not only 3 to 5 years earlier flowering results, but also dwarf trees, easy to manage and improve yield per plant and unit area. 1. In situ selection of fine single plant. Excellent single plant standards are: under the same site conditions, the performance of high yield, stable yield, early strong, adult tree production of not less than 20 kg, crown projected area per square meter yield is not low