虽然杨属中大多数树种的营养繁殖都很容易,但是白杨派的各个种的营养繁殖还是有困难的。美国在这方面的研究报告不多,欧洲林业工作者对欧洲山杨的繁殖曾投以相当大的力量进行过研究,目前已获得若干培育技术可供生产上应用。本文是用美洲山杨(P.tremuloides)与大齿杨(P.grandidentata)的幼小根蘗为材料应用了 Muhle Larsen 介绍的、在欧洲行 Although the poplar genus most of the species of vegetative reproduction is very easy, but all kinds of Poplar breeding nutrition is still difficult. There are few reports on the research conducted by the United States in this field. European foresters have invested considerable strength in the breeding of Populus euphratica. So far, several cultivation techniques have been obtained for production application. This article is based on the application of Muhle Larsen with young root tillers of P. tremuloides and P. grandidentata,