根据对内蒙古大兴安岭兴安落叶松林样地调查结果,采用点格局分析法分析不同抚育采伐方式对兴安落叶松林群落活立木分布格局、兴安落叶松树种及其不同龄级活立木分布格局的影响。结果表明1)不同抚育采伐方式对兴安落叶松林群落活立木分布格局具有明显影响。在兴安落叶松原始林内,活立木在0～2m尺度上呈现随机分布状态,超过2m则呈现显著性聚集分布,渐伐林内,活立木在2～9m尺度上呈现聚集分布,在其余尺度上呈现随机分布,皆伐林内,活立木在0～19m尺度上呈现聚集分布,r>19m时呈现随机分布。2)抚育采伐方式渐伐对兴安落叶松树种分布格局影响较小,而皆伐对兴安落叶松树种分布格局影响较显著。3)不同抚育采伐方式对龄级1活立木分布格局影响显著,渐伐对龄级2活立木分布格局影响较小,而皆伐对龄级2活立木分布格局影响显著,抚育渐伐对龄级3活立木分布格局影响不明显。

Based on the inventory of the Larix gmelinii forest sample plots in Greater Khingan Mountains,Inner Mongolia,the method of point pattern analysis was employed to study the impact of different cutting methods on the distribution pattern of community standing trees in Larix gmelinii forest,the Larix gmelinii tree species and the different age-class standing trees.The results showed that1)Different cutting methods have great impact on the distribution pattern of community standing trees in Larix gmelinii forest;In Larix gmelinii virgin forest,the distribution pattern of standing trees presented stochastic mode on 0-2m scale,it presented significant cluster mode on >2m scale;In successive cutting forest,the distribution pattern of standing tree presented cluster mode on 2-9m,it presented stochastic mode on other scale;In clear cutting forest,the distribution pattern of standing tree presented cluster mode on 0-19m scale,it presented stochastic mode on >19m scale;2)Successive cutting method have little impact on the distribution pattern of Larix gmelinii tree species,while the impact of clear cutting method is on the opposite;3)Different cutting methods have great impact on age-class1,successive cutting method has little impact on age-class2,while clear cutting is on the opposite and the successive cutting method has little impact on age-class3.