中文摘要：

为探讨竹林中毛竹（Phyllostachys edulis）与木本植物间的生态位关系,主要采用Levins、MacArthur-Levins和Pearson等指数,对江西大岗山天然毛竹林中20个主要树种的生态位宽度、生态位重叠及种间相关性等生态特征进行了分析和DCA排序研究。结果表明：毛竹是竹林中最强的优势种,其生态位最宽（BA=0.711）,且对其他树种生态位重叠度较大（Oij〉0.30）,而其他多数树种对毛竹生态位重叠度则较小（Oji〈0.25）,说明它对其他树种具有较明显竞争优势。同时,竹林内种间负关联种对数占67.89%,大多树种间存在较大的生态异质性与资源利用差异性,它们可长期共存,形成较为稳定的竹木混交林,尤其是毛竹与丝栗栲、山乌桕、杉木等树种更易形成竹阔（杉）混交林。

英文摘要：

In order to better understand the relationship between Phyllostachy edulis and trees,the niches,interspecific association and DCA ordination of 20 dominant species in Ph.edulis forests in Dagangshan Mountain in Jiangxi Province were studied by the methods of indexes of Levins,MacArthur-Levins and Pearson.The results indicated as follows：Ph.edulis,with largest niche breadth（BA=0.711） and larger niche overlap to trees（Oij0.30）,was the dominant species,a superior competitor for resources to trees.Meanwhile species-pairs of negative interspecific association accounted for 67.89%,showing that most species in bamboo forest were greatly different in ecological characteristics and resource exploitation with each other.These species,especially Castanopsis fargesii,Sapium discolor and Cunninghamia lanceolata,could construct bamboo-broadleaved（firry） mixed forest along with Ph.edulis.