嫁接时间和绑扎方式对中华金叶榆插皮枝接成活率的影响

Influences on the survival rate by grafting date and the strapping method on bark-tongue graft access of Ulmus pumila ‘Jinye'

以3年生胸径4~5 cm和4年生胸径6~8 cm的白榆为砧木嫁接中华金叶榆,研究不同嫁接时间和嫁接口绑扎方式对成活率和成苗率的影响。结果表明：3月30日至4月30日期间（即砧木展开1~2片小叶后延续30d）嫁接成活率均达到了90%以上,显著高于其他嫁接时间,主枝长度较长;插入接穗后,先在砧木接面上捆扎0.008mm的塑料薄膜,取一塑料袋,使之分别缠绕于接穗切口,并覆泥土于断面的袋上,最后用0.04 mm普通塑料膜自下而上捆扎,伤口愈合后用刀将塑料膜的捆扎处挑破。这种嫁接口绑扎方式成活率92%、成苗率88%,显著高于其他绑扎方式。

Three years old white elm seedlings with diameter of 4-5 cm and 4 years old white elm seedlings with diameter of6-8 cm were used as rootstocks for grafting Ulmus pumila‘Jinye’. Influences of grafting date and strapping method on survival rate and seedling ratio were studied. The results showed that survival rate reached 90% during the period of March30 th to April 30th（ one month since 1-2 leaflets appeared on the root stock）. It was significantly higher than the other grafting date. Its length of stem was longer than that of the other grafting date. The grafting procedure was shown as follows：after a scion was inserted,the surface of root stock was tied up using 0. 008 mm plastic film. A plastic bag was wrapped in a scion incision,and the soil was used to cover the cross section of the bag,and finally the grafting seedling was strapped with 0. 04 mm ordinary plastic film from bottom to top.The plastic would be cut with a knife after the healing of wound. This way of grafting had a survival rate of 92%,and seedling ratio of 88%,it was significantly higher than that of other strapping method.