过去更换果树品种，大多采用伐除老树，栽植新品种的方法。这种方法费工费时，劳民伤财，影响几年的经济收入。为了克服这一弊端，特介绍一种更换果树品种的新法。 　　一、大树：于春季芽前，对主、侧枝枝头较大的枝组于 2－ 3cm处锯掉，劈接成腹接新品种。由于所接新品种处 In the past to replace the fruit tree species, mostly used to remove the old tree, planting new varieties of methods. This method of laborious and time-consuming, waste of money, affecting several years of economic income. In order to overcome this shortcoming, we introduce a new law to change fruit tree species. First, the big tree: Before the spring buds, the main branches of the branches larger branches sawing at 2 - 3cm, split into new varieties of abdominal access. Due to the new varieties of office