松江河林区位于长白山西部,平均海拔在700—1000米左右。目前除山地深处还有成片的原始针阔叶混交林外,其外围大部是阔叶混交林,针阔叶之比约为三比七,阔叶树种以椴木、柞木、曲柳、枫桦、榆木、杨木等为最多。为了认识和掌握树木根部腐朽的规律性,以便合理量材设计,充分利用木材资源,现就本人从事木材检验工作的实践,谈谈对椴木、水曲柳、柞木、枫桦四个树种根部腐朽111例调查情况与墩腐留优。一、柞木、椴木、水曲柳、枫桦根部内腐111例调查及分析 (一) 柞木材质较好,藏量较大,几年来到材约占树种的15—20％。由于它不甚耐腐,透水性、吸 Songjianghe Forest is located in western Changbai Mountain, with an average elevation of 700-1000 meters. In addition to the depths of the mountain still into the original coniferous and broad-leaved mixed forest, the outermost part of the broad-leaved mixed forest, coniferous and broad leaves ratio of about three to seven, broad-leaved trees to basswood, oak, Maple birch, elm, poplar, etc. for the most. In order to understand and grasp the regularity of decayed roots of trees in order to rationally quantitative timber design, make full use of wood resources, is now engaged in the practice of timber inspection, to talk about the basswood, ash, oak, maple four tree species Root decay 111 cases of investigation and mound retention. First, the oak, basswood, ash, maple root internal rot 111 cases of investigation and analysis (A) oak wood is good, large reserves of timber in recent years accounted for about 15-20% of species. Because it is not very decay, water permeability, suction