中文摘要：

根据野外38个样方的植被调查数据，运用2×2列联表的x^2检验、Jaccard关联指数、Spearman秩相关系数和Pearson相关系数对河北邢汾高速公路沿线植被的26个优势种进行了植物群落种间关系的研究．结果显示：植物群落总体呈负相关的趋势，优势种种间关联性不强，种间独立性较高，不同组间联结性比较松散，呈显著或极显著的正联结种对较少；x^2检验与Jaccard关联指数、Pearson相关系数与Spearman的有机结合才能更加准确地反映种间关系；依据测定结果，同时结合物种生物学特性与生态适应性特征，将26个优势种划分为3个生态种组，生态种组的划分为近自然植物群落的推荐和公路边坡植被的恢复和重建提供了重要的理论依据．

英文摘要：

Based on the field investigation data in the roadside of Xingfen highway of Hebei province, 26 dominant species in the plant community have been studied on the interspecific relationship through x^2-test using 2 × 2 contingency table, Jaccard index, Spearman rank coefficient and Pearson coefficient. Result showed that： Plant species interaction in the community generally has negative association; interspecific association of the dominant species is not so close and interspecific independence is slightly higher; association of different pairs is quite loose and few species pairs exhibit significant or highly significant association. The combination of x^2 test and Jaccard index, Spearman rank coefficient and. Pearson coefficient can more accurately reflect the relationship of interspecific species. The 26 dominant plant species were divided into three ecological species groups based on species biological characteristics and ecological adaptability, and such classification of these can provide significant theoretical foundation for recommendation of nearly natural plant communities and restoration and revegetation of plant communities in the roadside.