黑龙江林区,是我国历史上遗留下来最大的一片国有林区,建国以来,一直担负着国家商品材产量三分之一以上;也是我国东北地区各主要内河的发源地,一千五百余万公顷森林,北抵西伯利亚寒流,南阻太平洋热风,滋润着亿亩良田、牧场,是我国东北地区亿万人民赖以生存的自然生态体系之主体。由于集中过量采伐和经营管理不善,致使完达山小兴安岭的四十个林业局,当前己出现严重的采育失调现象。若按现在以采伐为中心、采光拉倒的经营方式继续下去,到本世纪末,将有百分之七十的林业局 Since the founding of the People’s Republic of China, it has been responsible for more than one third of the national output of commodity products. It is also the birthplace of major inland rivers in northeast China, with over 15 million Hectare forests, north to Siberia cold, the South blocking the Pacific hot air, moist acres of fertile land, ranch, is the northeastern region hundreds of millions of people rely on the survival of the natural ecological system of the main body. As a result of excessive over-harvesting and poor management, the 40 forestry bureaus in Xiaoxing’anling Wandashan have now had serious problems of procreation and parenthesis. If we now focus on harvesting, the management mode of daylighting down will continue. By the end of this century, 70% of the forestry bureaus