中文摘要：

为了从种间联结性的角度揭示霸王群落的稳定性机制,基于2×2列联表,运用多物种总体联结性,各物种间联结性、联结系数、共同出现百分率,对民勤荒漠区霸王群落2大分布区的种间联结性进行分析.结果表明：五托井霸王群落总体表现为联结程度不显著的正关联,群落处于比较稳定的阶段,建群种霸王的优势明显,整个群落将朝着稳定无关联的方向发展;石榴井西霸王群落总体表现为联结程度不显著的负关联,群落处于比较不稳定的演替阶段.五托井霸王群落内12个主要植物种构成的66个种对间,有显著相关性的仅占12％,正联结程度明显高于负联结程度,但很多x2检验相关性不显著的种对间,尤其是霸王与其他种对间的联结程度极高,群落处于稳定阶段;石榴井西霸王群落内12个主要植物种构成的66个种对间,有显著相关性的仅占7.58％,负联结程度明显高于正联结程度,霸王与其他物种间的联结系数AC均表现为相互独立,群落处于比较不稳定阶段.群落稳定性、群落总体联结性及群落内物种间联结性相互之间呈正相关关系.

英文摘要：

Abstract： Based on the 2×2 table, series of approaches including overall association, interspecific association, percentage co-occurrence （PC） and association coefficient （AC） were used to analyze the interspecific association of Zygophyllum xanthoxylum community in Minqin desert area. The results showed that： overall association was insignificant positive association. Community was in a relatively stable stage. Zygopkyllum xan＆oxylum as constructive species had obvious advantage. The whole community would developing toward the stable and unrelated direction in Wutuojing, while overall association was insignificant negative association. Community was in a relatively unstable stage in Shiliujing. Only 12% species pairs showed significant correlation in 66 species pairs that consists of 12 mainly species in Wutuojing. The positive association was obvious higher than the negative association. There were high association among most species pairs, especially between Zygophyllum xanthoxylum and the other species pairs, whereas there were no significant correlations by χ2 test. So community was in a relatively stable stage. Only 7.58% species pairsshowed significant correlation in 66 species pairs that consisted of 12 mainly species in Shiliujing. The negative association was obvious higher than the positive association. Association coefficient （AC） was 0 between Zygophyllum xanthoxylum and the other species pairs. So community was in a relatively unstable stage. There were positive correlations among community stability, whole association and interspecific association.