几年来我们对河北省和北京市的落叶松人工林做了一些调查。包括承德、张家口、保定、石家庄及门头沟、昌平、延庆等地的18个山区林场和大队,共调查标准地245块,作解析木52株。这些地方的落叶松大都生长良好,是个很有发展前途的造林树种。 目前,我省中山区(800—1500米)经营的主要是油松人工林和山杨、桦木、橡树天然林,落叶松人工林只占油松人工林的百 In recent years we have done some surveys on larch plantations in Hebei and Beijing. 18 mountain forest farms and brigades including Chengde, Zhangjiakou, Baoding, Shijiazhuang and Mentougou, Changping and Yanqing were surveyed, and a total of 245 were investigated and 52 were analyzed. Most of the larches in these areas are growing well and are promising afforestation species. At present, the Zhongshan District of our province (800-1500 m) is mainly operated by Pinus tabulaeformis plantations and poplar, birch, oak natural forest, larch plantation only 100