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一、砧木:改接的树应在20年生以下,树势生长旺盛,树干高2米以下。如果树干过高,树龄在30年生以上的树,可在截干后的第三年进行改接。砧木接口直径在5~10厘米的可插入2~3根接穗;干周50厘米以上的,接头不能少于4个。幼树可单头改接。
First, rootstocks: the tree should be changed following the 20-year-old or below, vigorous growth of tree vigor, trunk height 2 meters below. If the trunk is too high, the tree above 30 years of age can be switched over in the third year after the stem is cut off. Rootstock interface diameter of 5 to 10 cm can be inserted 2 to 3 scion; dry weeks more than 50 cm, the joint can not be less than 4. Saplings can be a single change.