在实地调查基础上，对广东阳春鹅凰嶂省级自然保护区内7个样方中紫纹兜兰〔Paphiopedilum purpuratum （Lindl.） Stein〕群落各层次的物种组成及优势种进行了分析，并采用方差比率、x2检验和种间关联度指数，研究了紫纹兜兰与其余主要草本植物的种间联结性。结果表明：样方内共有维管植物48科78属94种。从各样方主要草本植物的种间总体关联性看，4个样方为显著正关联，2个样方为正关联，1个样方为负关联。在19个主要草本植物组成的171个种对中，131个种对的种间联结性不显著。在紫纹兜兰与其余主要草本植物组成的42个种对中，25个种对呈正关联，17个种对呈负关联。在部分样方中，紫纹兜兰与深绿卷柏（Selaginella doederleinii Hieron.）、中华薹草（Carex chinensis Retz.）、蔓九节（Psychotria serpens Linn.）、竹叶兰〔Arundina graminifolia （D. Don） Hochr.〕、高秆珍珠茅〔Scleria terrestris （Linn.） Fass.〕和石萝藦（Pentasachme caudatum Wall. ex Wight）呈显著或极显著正关联，与大芒萁（Dicranopteris ampla Ching et Chiu）、蔓九节、黑莎草（Gahnia tristis Nees）和蚂蝗七（Chirita fimbrisepala Hand.-Mazz.）呈显著或极显著负关联。综合分析认为，该自然保护区紫纹兜兰群落物种丰富，主要草本植物的种间总体关联性以正关联为主；紫纹兜兰与多数主要伴生草本植物的关联性不显著，且分布相对独立和随机。

 On the basis of field investigation， the species composition and dominant species in each layer of Paphiopedilum purpuratum （Lindl.） Stein community in 7 plots in Ehuangzhang Provincial Nature Reserve of Yangchun in Guangdong were analyzed， and the interspecific association of P. purpuratum with other main herbs was researched by variance ratio， x2-test and interspecies association indexes. The results show that there are 94 species of vascular plants in 78 genera of 48 families in the plots. From the overall interspecific association of main herbs in each plot， 4 plots are significantly positively associated， 2 plots are positively associated， and 1 plot is negatively associated. Among 171 species pairs composed of 19 main herbs， 131 species pairs have no significant interspecific association. Among 42 species pairs consisted by P. purpuratum with other main herbs， 25 species pairs are positively associated， and 17 species pairs are negatively associated. In some plots， P. purpuratum shows significantly or extremely significantly positive associations with Selaginella doederleinii Hieron.， Carex chinensis Retz.， Psychotria serpens Linn.， Arundina graminifolia （D. Don） Hochr.， Scleria terrestris （Linn.） Fass. and Pentasachme caudatum Wall. ex Wight， and shows significantly or extremely significantly negative associations with Dicranopteris ampla Ching et Chiu， P. serpens， Gahnia tristis Nees and Chirita fimbrisepala Hand.-Mazz. According to comprehensive analysis， the species of P. purpuratum community in this nature reserve are rich， the overall interspecific association of main herbs is mainly positive association； P. purpuratum shows no significant association with most of main associated herbs， and its distribution is relatively independent and random.