吉林省大兴沟林区经过多次采伐,森林资源逐年减少,为加速后备资源的培育,扩大造林树种,我们在1976年从辽宁、吉林两省引进了十几个优良杨树品系,在大兴沟林业局托盘、红石两个林场的山地进行了引种栽培试验。现将试验情况小结如下,供生产、科研单位参考。 In order to speed up the cultivation of reserve resources and expand afforestation trees, after several harvesting in Daxing Gou Forest District in Jilin Province, forest resources have been reduced year by year. In the year of 1976, a dozen excellent poplar strains were introduced from Liaoning and Jilin provinces. Forestry Bureau tray, two mountain forests in Hongshi introduced cultivation test. Now the test summary is as follows, for production, scientific research units for reference.