天然栎类阔叶混交林是皖南山区低山丘陵常见植被类型。本文以铜陵县叶山林场天然栎类阔叶林为研究对象，通过大样地调查，采用Ripley’s K（d）点格局分析法对优势种群空间格局及其关联性进行了分析。结果表明，优势种群栎类直径分布呈偏左正态分布，具有同龄林直径分布特点，为发展种群。在种群空间格局上，麻栎在0～39 m的尺度上为聚集分布，在40~42 m尺度上为随机分布，在大于41 m尺度上为均匀分布。青冈栎在0~40 m尺度上聚集分布，在41~47 m尺度上呈现随机分布，大于47 m尺度上均匀分布。在种群的空间关联性上，麻栎和青冈栎在0~34 m尺度上负相关，在大于43 m的尺度上呈现出显著的正相关。麻栎和青冈栎大树（胸径≥20 mm）和小树（胸径＜20 mm）之间的关联性都表现为小尺度上（0~25 m）正关联，大尺度（51~65 m）上的负关联，中等尺度上（26~50 m）的不显著关联。在大多尺度上，栎类与其伴生树种都无显著关联。
Natural Quercus broadleaved mixed forest is a common type of vegetation in mountainous area of South Anhui. Based on the investigation of the large plot of natural Quercus broadleaved mixed forest in Yeshan Forestry-farm of Tongling County, the spatial distribution patterns and their associations of the dominant tree species with the Ripley's K (d) point pattern analysis were analyzed. The results indicated that the diameter distribution of Quercus dominant populations showed a left-skewed distribution, with even-aged forest diameter distribution characteristics, and were of developing populations. The spatial distribution pattern of Quercus acutissima population was aggregated, random and uniform distribution on a scale from 0 to 39 m, 40 to 42 m and over 42 m, respectively. The spatial distribution pattern of Cyclobalanopsis glauca was aggregated, random and uniform distribution on a scale from 0 to 40 m, 41 to 47 m and more than 47 m, respectively. The spatial relationships of the population between Quercus acutissima and Cyclobalanopsis glauca were negatively correlated from 0 to 34 m, and positively associated on a scale of more than 43 m. The spatial relationship between the larger tree（DBH≥20 cm）and the small tree（DBH＜20 cm）for Quercus acutissima and Cyclobalanopsis glauca were positively associated on a small scale（0-25 m）, negatively correlated on a large scale (51-65 m), and were not correlated on a medium scale (26-50 m).On most scales, there were no correlation between the tree species of Quercus and other associated tree species.