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我盟自六十年代初期引种华北落叶松成功之后,在全盟范围迅速发展。目前,全盟落叶松人工林保存而积42万多亩,其中国营林场落叶松面积达25万亩,占60％左右。引种最早的国营苏木山林场现有落叶松保存面积61,500亩,已郁闭成林的有18,900亩。根据标准地调查,现最大胸径17.5厘米,最高12米,平均胸径6.5厘米,平均高6.15米,每亩蓄积量4立方米左右。而且在上高台、保安、蛮汉山、南天门、五道沟等国营林场
Since the introduction of the Larix principis-rupprechtii from the early 1960s, our Union has been developing rapidly in the alliance. At present, the whole league Larch plantation saved more than 420,000 mu, of which the national forest farm larch area of 25 million mu, accounting for about 60%. The earliest introduced state-owned forest Mt. Larch current preservation area of 61,500 acres of larvae, has closed forest 18,900 acres. According to the standard survey, the maximum diameter of 17.5 cm, the maximum diameter of 12 meters, an average diameter of 6.5 cm, an average of 6.15 meters high, 4 cubic meters per acre volume. And in the high-profile, security, Man Han Shan, Nantianmen, Wudaogou and other state-owned forest farms