梨树进入衰老期,表现为结果枝组衰老,结果能力下降;新梢下垂,有的自然枯死;内膛局部萌发徒长枝;延长枝修剪反应不敏感;果实品质变劣,个头变小。为充分发挥梨树的生产潜力,延长梨树经济寿命,必须进行更新复壮。老龄梨树注重根系的修剪。具体方法:秋 Pear tree into the aging period, the performance of the results of the branch group of aging, the results decreased ability; shoot drooping, and some natural withered; bore local germination only long branches; extension of the pruning reaction insensitive; fruit deterioration, head smaller. In order to give full play to the productive potential of pear tree and extend the economic life of pear tree, it must be renewed and rejuvenated. Old pear tree focus on root pruning. Specific methods: autumn