衰老梨树内膛空秃,叶幕层薄,外围枝生长势弱,新梢碰细,短果枝少,产量低,果实小,品质差。可用以下方法更新复壮,增产增收:(1)深翻土地,切断一些细根,重施基肥,促使多发新根,但深翻时不可使根部受伤过分。早春及花后,应及时追肥,促使发枝健壮生长.(2)加强病虫害防治。树上的溃疡腐烂处以及树洞,要剥除腐朽部分,消毒保护;大树洞 Elder pear tree bore bare albino, thin leaf curtain, the peripheral growth of weak, new shoots touch thin, short short branches, low yield, small fruit, poor quality. The following methods can be used to rejuvenate and increase production and income: (1) deep sowing the land, cutting off some fine roots, re-applying basal fertilizer, causing multiple new roots, but deep rooting may not cause excessive root injury. Early spring and post-flowering, should be promptly topdressing, to promote the robust growth of branches. (2) to strengthen pest control. Tree ulcer decay and tree holes, to remove the decadent part, disinfection and protection; tree hole