落叶松中龄林林分空间结构研究

在辽东山区结合实地调查,利用角尺度、混交度、大小比数等林分空间结构指标分析了落叶松中龄林的空间结构特征。结果表明:林分平均混交度为0.112 5,林分混交程度很低,林分结构稳定性较差;平均大小比数0.482 5,分布呈均匀态势,胸径差异不显著;林分平均角尺度为0.35,林分分布格局基本上以均匀分布为主。

Stand Spatial Structure of Half-Mature Forest of Larix gmelinii

Spatial structure characters of half-mature forest of Larix gmelinii by using stand spatial structure index (angular scale,mixture ratio,size ratio)were analyzed combined with field surveys in eastern Liaoning mountainous areas.Result shows that:the average mixture ratio of stand is 0.1 12 5;the level of mixed stand is very low and the stand structural stability is poor;the average size ratio is 0.482 5;the distribution is uniform trend;diameter differ-ence is not significant;the average angle scale for stand is 0.35,stand distribution pattern is mainly even distribu-tion.