我盟杨树良种引种工作是从近年才开始的,因此,大部处在育苗阶段,与生产和科研的需要差距很大。我盟杨树良种引种工作,早在1962年就从内蒙林研所引进,但因受刘少奇、林彪修正主义路线干扰,只在苗圃培育了一个阶段,没搞定植试验,最后把这些苗条全部处理掉了。后在1965年又引进少量品种。我盟大量的引进杨树良种是从1972年 The introduction of poplar varieties in our Union started in recent years, so most of them are in the stage of raising seedlings, which is far from the need of production and scientific research. However, due to interference from the revisionist line of Liu Shao-chi and Lin Piao, only one stage was nurtured in the nursery, no planting experiments were conducted, and finally all these slimies were finally handled Lost. After introducing a small number of varieties in 1965. My League a lot of introduction of poplar seed is from 1972