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我场栽培的油桐主要是雌雄同株的三年桐和雌雄异株的千年桐(绉桐)。三年桐生产期短,抗逆性差;千年桐生产期长,抗逆性较强。但千年桐由于常出现大量的雄株(有的几乎占全林的50%,最多的达70%),严重地影响单位面积的产量。为了解决这一问题,我场自一九七二年以来,用嫁接的办法获得了较好的效果。在嫁接技术上,先后采用过大公树短桩劈接、桐苗顶芽劈接、短桩切接、长芽条贴接、芽筒套接、丁字形芽接、嫩苗长芽条贴接、桐苗嫩梢对接等八种方法,实践证明以嫩苗嫁接较好,成活率可达95%以上,而且操作简便。在一般管理下,当年就可出圃造林。
The tung oil cultivated in our field is mainly composed of monoecious Trichosanthes and dioecious Trichosanthes. Three years tung production period is short, poor resistance; Millennium Tong long production period, strong resistance. However, due to the frequent emergence of a large number of male Tong (some almost 50% of the total forest, up to 70%), seriously affecting the yield per unit area. In order to solve this problem, my field has achieved good results by grafting since 1972. In grafting technology, has adopted a large male tree short stubble splitting, Tong Miao top bud split, short cut cut, long bud sticking, bud tube socket, Tongmiao tender shoots and other eight methods, the practice proved to tender grafted better survival rate of up to 95%, and easy to operate. Under general management, we can plant nursery plants in those years.