Abstract:

Reproductive techniques for the new variety Qinzhong No.1～4 of Eucommia ulmoides were studied to resolve the bottleneck problem of being difficult to be cultivated in large areas.These problems are mainly lie in difficult rooting in cutting and tissue culture propagation,material deficiency in root burying propagation,low survival rate of branch grafting and budding in spring etc.A new propagation method of budding in Eucommia ulmoides was summarized in this study.Higher propagation coefficient and survival rate was achieved by using this budding method on the propagation of Qinzhong No.1～4(the survival rate was up to 97%).Effect of variety improvement and large tree crow can be achieved by cutting the mature tree(10～13 a)and budding with the new propagation method.In July of the second year after grafting,the new shoot biomass can be up to 135.4 cm and the tree crow can be 105.6 cm.

Key words: Eucommia ulmoides, new variety, reproductive technique, grafting, bud grafting, variety improvement