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利用Ｌｅｖｉｎｓ、Ｈｕｒｌｂｅｒｔ生态位宽度公式和Ｐｉａｎｋａ生态位重叠公式测定了宝天曼落叶阔叶林１４种主要乔木和２２种主要灌木种群的生态位宽度和生态位重叠，并对生态位宽度、生态位重叠以及种间联结性的关系进行了初步探讨．结果表明，群落中主要优势种群的生态位宽度较大，乔木层主要优势种锐齿栎和漆树的Ｌｅｖｉｎｓ和Ｈｕｒｌｂｅｒｔ生态位宽度分别为１８．５２７、７．４８８和０．８８９、０．６８０，灌木层主要优势种哥兰叶、山葡萄和胡枝子的Ｌｅｖｉｎｓ和Ｈｕｒｌｂｅｒｔ生态位宽度分别为１８．９６４、１４．４７９、１３．２５１和０．９０８、０．７９９、０．７８５．具有相同或相似环境要求的物种间生态位重叠较大，生态位宽度较大的物种与其它种群间的生态位重叠较大．种间正联结性越强，其生态位重叠值越大，种间负联结性越强，其生态位重叠值越小．
The niche breadth and niche overlap of 14 main tree species and 22 dominant shrub species in Baotianman deciduous broad-leaved forest were determined by Levins, Hurlbert niche breadth formula and Pianka niche overlapping formula. The niche breadth, niche Overlap and interspecific association were discussed. The results showed that the niche breadths of dominant dominant populations in the community were larger, and the Levins and Hurlbert niche breadths of the dominant species, Quercus acutissima and Arbor, were 18.527, 7.488 and 0.889, 0.680 respectively, The Levins and Hurlbert niche breadths of the dominant dominant species, Gelandia scoparia, Lespedeza insignis and Lespedeza viridewere 18.964, 14.479, 13.251 and 0.908, 0.799, and 0.785, respectively. The niche overlap between species with the same or similar environmental requirements is larger, and the niche overlap between species with larger niche breadth and other populations is larger. The stronger the interspecific positive association, the greater the niche overlap, the stronger the negative interspecific association and the smaller the niche overlap.