中文摘要：

为进一步揭示天然阔叶红松林的空间结构规律,为合理选择种群结构研究方法提供借鉴,在长白山自然保护区内设立面积为1hm^2的固定样地,对样地内的林木进行每木调查和坐标定位。运用均匀度理论对不同径阶大小的林木进行空间格局分析,并运用均匀度、点格局、角尺度3种格局研究方法对样地中的主要树种及林分整体的空间格局进行对比分析。结果表明：1）小径阶林木的分布状态为集群分布,随着径阶的增大,林木由集群分布向随机分布转变。2）阔叶红松林的格局分布为集群分布,这主要受到了演替阶段和林分年龄的影响。3）3种方法在格局不太明显的种群上存在一定的差异,但这3种方法在格局检验上各有优势。

英文摘要：

This paper intended to investigate the spatial structure pattern of natural Korean pine broadleaved forests and to provide a basis for managing the natural forests. Topcon was used to survey every tree in a 1 hm^2 plot in Changbai Mountains, and a uniform index was employed to analyze the spatial characteristics of trees with different diameter classes in the plot. Further, pattern testing-uniform index, point pattern and angle index were used to analyze the spatial distribution pattern of dominant tree species and the whole stand. Results showed that trees with different diameter clasaes had different spatial distribution patterns. Distribution of small trees exhibited a clustered pattern while that of the old trees had a random pattern. The results analyzed with the three pattern-testing methods all indicated that the spatial distribution of the natural Korean pine broadleaved forest displayed a clustered pattern. Pinus Koraiensis, Fraxinus mandshurica, Quercus mongolica exhibited mainly random pattern and the other species had a clustered pattern. There were some differences among three methods in testing some species, but every method had its own superiority. This study would supply theory foundation for the future forest management.