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一、引言西十加杨(Pepulus canadenssuavoiens)是苏联П.Л.波格丹诺夫于1936年将加拿大杨(欧美杨)的一个无性系——新生杨(P.xeuramericana cv. ’regenerata’)合接在西伯利亚杨(P.suaveoiens)上得到的。波氏称其为加拿大杨——西伯利亚杨无性杂种№10。我省于1961年春季由中国林业科学院林科所引入。先后在白城、长春、吉林、四平等地区进行试种,表现良好或较好。不仅比较耐寒,而且在湿润、肥沃的立地条件下生长更好。但是,在苗圃、良种繁育场或幼林当中,则经常看到它的无性分离现象,有时甚至还很
I. INTRODUCTION Pepulus canadenssuavoiens is a species of P. xeuramericana cv. ’Regenerata’, a clone of Populus euphratica (Populus euphratica) from Canada in 1936 by the Soviet Union. The joint was obtained on P.suaveoiens. Boehner calls it Populus canadensis - Poplar Siberian hybrid №10. The province in the spring of 1961 by the Chinese Academy of Forestry Linke introduction. Successively in Baicheng, Changchun, Jilin, four equal areas for trial planting, performed well or better. Not only is it hardy, it grows better under wet, fertile site conditions. However, in nurseries, breeding farms, or young forests, it is often seen as asexual segregation, sometimes even very