大兴安岭北四局“五、六”特大森林火灾,蔓延速度之快、燃点高、强度大,使森林资源,尤其森林后备资源损失惨重,是我国历史上罕见。仅就塔河林业局的过火面积为36.4万ha,其中,有疏林地过火面积29.6万ha,蓄积2230.5万m~2,占总经营面积的30％,使森林复被率由原来的68.1％,下降到53.8％,下降了14.3％。在有疏林地的过 The “four or six” large forest fires in the northern part of the Greater Hinggan Mountains have a rapid spread, high burning point and high intensity, which makes the loss of forest resources, especially the reserve resources of the forest, very rare in our history. Only Tahe Forestry Bureau over-fired area of ​​364,000 ha, of which there are unsparing forest area of ​​296,000 ha, accumulation of 22,305,000 m ~ 2, accounting for 30% of the total area of ​​operation, the forest rejuvenation rate from the original 68.1% , Down to 53.8%, down 14.3%. In sparse forest over