内蒙古大兴安岭林区,树种以落叶松和白桦为主,随着幼中龄林抚育任务的加大,生产的松、桦木杆也相应增加。松木杆可直接利用,销路好、效益可观。桦木杆则销售困难,经济效益很低。为充分利用资源,提高木材利用率,库都尔林 Inner Mongolia Daxinganling forest areas, mainly larch and birch tree species, with the young middle-aged forest tending tasks increase, the production of pine, birch poles also increased accordingly. Pine rod can be directly used, sales are good, considerable benefits. Birch pole sales are difficult, low economic benefits. In order to make full use of resources and improve timber utilization, Kuduerlin