利用金沟岭林场8块落叶松人工林固定标准地1986年、2001年、2008年的更新调查数据，研究了其天然更新的密度和分布格局动态。结果表明：林龄为中龄林（1986年）、近熟林（2001年）、成熟林（2008年）时，天然更新密度分别为1734、1956、2544株/hm2，中龄林、近熟林天然更新等级均为不良，成熟林更新等级为中等；中龄林更新较多的为云冷杉等针叶树种，随着林龄的递增，阔叶树种的更新增多；全林分在中、近、成熟林阶段分布格局均为聚集分布，聚集的程度随着林龄的增加而降低；各个树种更新分布格局也随林龄变动而发生变化，成熟林时，分布格局均为聚集分布。本研究通过分析更新密度和幼苗幼树的格局分布随林龄的动态变化，揭示落叶松人工林天然更新的发展趋势为云冷杉针阔混交林，为林分的可持续经营提供理论依据。%Eight plots data of larch plantation in the year of 1986, 2001, 2008 were used to study the dynamic changes of natural regeneration and distribution pattern. The results showed that:when in middle-aged, near mature, and mature forest, the density were 1 734 plants/hm2, 1 956 plants/hm2, 2 544 plants/hm2 respectively, the update grades of middle-aged and near mature forest were bad, the update grade of mature forest was medium. In middle-aged forest, the natural regeneration trees were main needle trees. With the increase of stands age, the numbers of broad-leaved trees were increased. In the stages of middle-aged, near mature and mature forest, the pattern of stands were aggregated distributions, and the degrees of aggregation were decreased with the increase of stands age. The patterns of all trees were mainly aggregated distributions and patterns were changed over time. When in mature forest, the patterns of all trees were aggregated distributions. This study was aimed at revealing the tendency of natural regeneration of larch plantation, in order to providing the basis for sustainable management of larch plantation.
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