中文摘要：

为探明煤矸石山自然定居植物群落优势种种间关系，本文采用疋。检验、Pearson相关系数和Spearman秩相关系数，对山西大同矿区煤矸石山自然定居植物群落中15个优势种105个种对的种间关系进行研究。结果表明：15个优势种间大部分种对的种间关联不显著，种间联结较为松散，说明大同矿区煤矸石山自然定居植物群落结构简单，仍处于演替初、中期阶段；优势种沙生冰草、披碱草与黄刺枚，黄刺枚、灌木铁线莲与旱榆之间呈极显著或显著正相关，它们为地带性分布植物种类，耐旱、耐寒、耐贫瘠，生态适应性强，可用于该区煤矸石山人工植被恢复的优选先锋物种进行混合种植。根据Spearman秩相关系数，将15个优势种群划分为3生态种组，土壤水分条件是导致其生态种组分化的主导因子。

英文摘要：

In order to figure out interspecific associations among dominant species in naturally colonized plant communities on coal gob piles, the interspecific associations among 15 dominant species in naturally colonized plant communities on coal gob piles of Datong mining area in Shanxi, China were studied by using X2-test, Pearson correlation coefficients and Spearman rank correlation coefficients in this study. The results showed that the interspecific associations of most species-pairs among 15 dominant species were not significant, which illustrated that the naturally colonized plant communities on the coal gob piles of Datong mining area had simple community structures and were still at the early or middle stage of succession. The dominant species pairs of Agropyron desertorum or Elymus dahuricus and Rosa xanthina, R. xanthina or Clematis fruticosa and Ulmus pumila showed extremely significant or significant positive correlation; these species are species of zonal distribution with strong ecological adaptability to drought, cold weather and poor soil fertility, which could be mixedly planted as the pioneer species for local coal gob piles revegetation. Based on Spearman＇ s rank correlation coefficients, the 15 dominant species were divided into 3 ecological species groups. Soil moisture was the key factor causing the differentia- tion of the ecological species groups.