落叶松是速生树种,在河北山地立地条件较好的造林地上,生长速度比油松快。据调查,20年生时平均高落叶松为油松的178.8％,平均胸径为油松的117.1％,蓄积为油松的161.2％。多年的造林实践证明,落叶松在河北山地是个很有发展前途的造林树种。 为总结河北山地落叶松造林经验,给发展落叶松造林提供科学依据。几年来对人工林进行了较全面的调查,共设标准地245块, Larch is a fast-growing tree species, in Hebei mountain grassland conditions better site, the growth rate faster than Pinus tabulaeformis. According to the survey, the average height of larch at 20 year-old was 178.8% of that of Pinus tabulaeformis, the average diameter at breast height was 117.1% of Pinus tabulaeformis and the accumulation was 161.2% of Pinus tabulaeformis. Years of afforestation practice has proved that larch in Hebei mountains is a very promising afforestation species. In order to summarize the afforestation experience of mountain larch in Hebei and provide scientific basis for the development of larch afforestation. Over the past few years a more comprehensive survey of plantations, a total of 245 sets of standard,