老劣果树及大树改接,是劣种换优的一条捷径,但传统的高接换头方法。由于嫁接的方法欠妥,在嫁接后的次年,常常导致树上与树下生长不平衡而死树。山东省林业局专家对传统高接技术进行了改良,取得十分显著效果,改接后的果树可以一年成形,两年丰产, Old poor fruit trees and trees to take over, is a shortcut for poor species change, but the traditional method of high takeover. Due to defects in grafting methods, the following year after grafting often leads to unbalanced growth of dead trees in the trees. Shandong Provincial Forestry Bureau experts on the traditional high-access technology has been improved and achieved very significant results, the fruit tree after the switch can be formed a year, two years of high yield,