落叶松是我国北方的优良树种。我场自1953年以来,共营造落叶松人工林六万多亩,有四万多亩已郁闭成林,其中有五千亩划为速生丰产林!进行经营管理。落叶松人工林达到郁闭之后,林木个体之间对水份、养份、光照等条件需求量越来越大,群体中种内斗争尖锐激烈,并开始分化,应进行抚育采伐。但异,选择那种抚育间伐方法,间伐强度多大,间隔期多长等,这些问题都需探索和研究。 Larch is an excellent tree species in northern China. My field since 1953, a total of Larch plantations to build more than 60,000 acres, 40,000 acres have been closed forest, of which 5,000 acres planted fast-growing high yield forest! Management. After the larch plantation reaches canopy closure, there is an increasing demand for water, nutrients, light and other conditions among tree-planting individuals. The intra-species struggle in the group is acute and intense, and differentiation begins. Therefore, deforestation should be carried out. However, the choice of the kind of tending thinning method, the thinning intensity and interval how long, these issues need to be explored and studied.