受干扰长白山阔叶红松林林分组成及冠层结构特征

通过样地调查对不同干扰方式产生的过伐天然林、次生白桦林和人工落叶松林等群落的结构组成进行分析和分类探讨 ,并选取了林窗片断和叶面积指数两个能表示群落冠层结构的指标进行分析。结果表明 ,林窗片断值分别为 :原始阔叶红松林 0 194、原始阔叶类 0 185、结构转换型 0 315、结构保留型 0 36 3、结构破坏型 0 2 35、严重干扰类型 0 5 5 0、次生白桦林0 2 13和人工落叶松林 0 2 2 7;叶面积指数分别为 :原始阔叶红松林 1 76 6、原始阔叶类 1 6 80、结构转换型 1 2 5 0、结构保留型 1 0 2 8、结构破坏型 1 5 5 0、严重干扰类型 0 6 35、次生白桦林1 731和人工落叶松林 1 4 73。

Structure of stand and canopy characteristics of disturbed communities of broadleaved Pinus koraiensis forest in Changbai Mountain

By sampling investigation,community structures of overcut original forest,secondary birch forests and larch plantation forest caused by different disturbances had been analyzed and classified gap fraction and leaf area index,and two community canopy structure index had been analyzed.Results of gap fraction were:original broadleaved Korean pine forest (0.194),original broadleaved stand (0.185),structure switched stand (0.315),structure reserved stand (0.363),structure destroyed stand (0.235),heavy disturbed stand (0.550),secondary birch stand (0.213), and larch plantations (0.227).Results of leaf area index were:original broadleaved Korean pine forest (1.766),original broadleaved stand (1.680),structure switched stand (1.250),structure reserved stand (1.028),structure destroyed stand (1.550),heavily disturbed stand (0.635), secondary birch stand (1.731), and larch plantations (1.473).