加拿大杨是我县广为栽培的树种,它具有根系发达,耐旱性较强,生长较快等优点,但也有干形差,出材率低容易感染病虫害和胁地的弊病。为了改良树种,加速干旱垣地绿化步伐,我县通化公社东孝原大队在长期的生产实践中,利用加拿大杨成材砍伐后的大根,皮下嫁接箭杆杨、毛白杨的方法取得较好的效果。 Populus canadensis is widely cultivated in our county. It has the advantages of developed root system, stronger drought resistance and faster growth. However, there are also some shortcomings such as poor stem shape, low yield of wood, and susceptibility to pests and diseases. In order to improve the tree species and speed up the greening process of the dry wall, in the long-term production practice, the Dongxiaoyuan Brigade of Tonghua commune in our county made good use of the large roots after the harvesting of Populus canadensis and subplantation of arrowhead poplar and populus tomentosa .