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油桐采取嫁接繁殖可以保持母本的优良性状,提早结实.利用嫁接的方法对优树进行当代鉴定,可以大大缩短良种的选育期,加快良种繁殖.多年来在嫁接方法上多采用劈接和芽接法,要求季节性强,嫁接时期短,劈接要在砧木萌动前不离皮时进行,芽接要求砧木到离皮时,接穗须待新梢上的芽成熟后才可进行.采用插皮接可在生长季进行,方法比劈接易掌握,且不劈伤木质部.嵌芽接系带木质部芽接,砧木离不离皮均可嫁接,接穗1年生枝条和当年生新梢均可利用.这两种方法嫁接成活率高、嫁接期长、接后当年成苗,1—2年生油桐在林地嫁接当年形成树冠,大树高接第2年结果(见图l).现将插皮接和嵌芽接进行油桐嫁接试验的初步结果简报如下:
Tung tree to take grafting and breeding can maintain the female parent’s fine traits, early fruiting.Using grafting method for the current identification of superior trees, can greatly shorten the breeding period of elite, accelerate the breeding of elite.Many years of grafting methods and more use of cleavage And budding method, requiring strong seasonal, short period of grafting, cleavage to rootstock before the germination from the time of the skin, budding requires rootstocks to the skin, the scion to be the buds on the new shoots before maturity. Then can be carried out in the growing season, the method is easier to grasp than the cleaved, and not cut the xylem Ministry embedded budding ligament xujie, rootstock can not leave the skin can be grafted, scion 1 year old branches and then the new shoots are available. The method of grafting survival rate is high, the grafting period is long, then the year seedlings, 1-2 years old tung tree in the woodland grafting year to form the crown, the tree tall take the second year results (see Figure l) The initial results of inoculation of tung oil grafting trial are as follows: