垂榆绿枝嫁接技术徐振德，王秀三，郑秋华（北票市林业局１２２１００）垂榆是名贵的园林绿化树种，通过人为加工造形，可以培育成多种美丽多姿、栩栩如生的动植物形态，因而深受园林工作者的青睐。在我国北方，又作为重要的街道绿化树种，广受欢迎。重榆主要是嫁接培育，... The technology of grafting on the branches of vertical and vertical branches of elm Yuzhuo, Wang Xiusan, Zheng Qiuhua (Beipiao forestry bureau 122100) The elm is a precious landscaping tree species which can be cultivated into many beautiful and lifelike animal and plant forms by artificial processing. By garden workers of all ages. In the north of our country, it is also widely used as an important street tree species. Heavy elm is mainly grafted cultivation, ...