梨树高接换头多在春季萌动前进行 ,但此期嫁接时间短 ,接芽萌发晚 ,1～ 2ａ没产量。从 1997年起 ,我们采用秋季高接花芽枝 ,来年春季剪砧更新的方法 ,对老品种梨树进行更新换种。此法具有嫁接时间长 ,接芽萌发早 ,提前结果等优点。我们在梁山镇果园试验并推广此项技术 ,取得头 Pear high interchangeable heads in the spring before the sprouting, but this period of grafting time is short, bud germination late, 1 ~ 2a no production. From 1997 onwards, we adopt the method of regenerating high-yield buds in autumn and updating the cuttings in the spring of next year to renew and change the old varieties of pear trees. This method has a long grafting, bud germination early, early results and so on. We test and popularize this technology in the orchard of Liangshan town, gain the head