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毛白杨(Populus tomentosa Carr.)生长快、材质好、寿命长,抗病虫害、较耐脊薄,是我国优良的城乡绿化及营造丰产林、防护林树种。但由于毛白杨难以得到大量种子,种子育苗不易成活,且类型分化也多。因此,多年来无性繁殖毛白杨一直是人们热心研究的课题。嫁接就是易被人们接受的无性繁殖方法之一。1982年,我们根据前人经验,以加杨、沙兰杨、波兰-15A及北京杨等为砧木,毛白杨为接穗,嫁接毛白杨35公顷,当毛白杨生长到一定高度后,发生大量死亡,给生产带来极大损失。为此,1983～1988年,我们结合生产,连续6年进行了不同品种杨树作砧木嫁接毛白
Populus tomentosa Carr. Grows fast, has good material, long life, resistance to pests and diseases, is more resistant to ridges and thinning, is our country’s excellent urban and rural afforestation and to create a high yield forest, shelterbelt species. However, Populus tomento difficult to get a lot of seeds, seedling is not easy to survive, and the type of differentiation is also more. Therefore, asexual propagation of Populus tomentosa for years has been a subject of enthusiastic research. Grafting is one of the most asexually propagated methods that people are receptive to. In 1982, based on the experience of our predecessors, we popularized 35 hectares of Populus tomentosa with Populus tomentosa, Sallamus, Poland-15A and Beijing Yang as the rootstocks. As a result, a large number of deaths occurred when Populus tomentosa grew to a certain height , Bring great loss to the production. To this end, from 1983 to 1988, we combined with production, for 6 consecutive years of different varieties of poplar rootstocks grafted white