兴安落叶松天然林不同林分结构林木水平分布格局特征研究

通过样地调查,分析了不同结构草类-落叶松林和杜香-落叶松林林木分布格局特征。研究表明:(1)年龄36 - 65年草类-落叶松林和年龄54 - 63年杜香-落叶松林分布格局中,均匀分布、随机分布和聚集分布所占比例分别为6.2%、50%、43.8%;(2)按林型分,草类-落叶松林分布格局中,均匀分布和随机分布所占比例均11.1%,聚集分布占77.8%。杜香-落叶松林分布格局均为随机分布;(3)树种组成在6落4阔 - 10落范围内,草类-落叶松林和杜香-落叶松林分布格局主要为聚集分布和随机分布两种类型。聚集分布主要集中在树种组成7落3阔 - 9落1阔范围内。

Study on the Distribution Pattern Characteristics of Different Stand Structures in Larix gmelinii Natural Forest

The distribution pattern characteristics of different stand structures in herbage-Larix forest and Ledum-Larix forest were analyzed by sample plots surveying. The study indicated:(1)In the 36 - 65 years old herbage-Larix forest and 54 - 63 years old Ledum-Larix forest distribution pattern, the proportions of even distribution, random distribution and clustered distribution were 6.3%, 50% and 43.8%.(2)From a view of forest types, in herbage-Larix forest distribution pattern, both the clustered distribution and regular distribution were 11.1%, the random distribution was 77.8%, while Ledum-Larix forest distribution pattern was all followed regular distribution.(3)In herbage-Larix forest and Ledum-Larix forest with composition of 6 Larix and 4 broadleaf species to 10 Larix and no broadleaf species, the distribution pattern was mostly clustered distribution and random distribution. Cluster distribution was mainly concentrated in the composition of Larix(70%)and broadleaf species(30%)to Larix(90%)and broadleaf species(10%).