中文摘要：

采用2×2列联表，通过方差分析、X^2检验和Ochiai指数对三江平原毛苔草群落1973年、1983年、2003年3个阶段主要物种的种间联结进行了定量分析。结果表明：随着演替进展，群落的总体种间关联性均表现为显著正关联，关联性排列为1983年〉1973年〉2003年；成对物种间的联结性质即正、负联结的比例未发生变化；成对物种间达显著相关的种对所占比例呈逐渐增加趋势；物种间的联结程度逐渐增强；相同种对的联结性质或关联程度在不同时期存在差异。

英文摘要：

A series of techniques including the analysis of variance, X^2-test and Ochia index were used together with a 2 ×2 contingency table in order to analyze the interspecific associations of dominant species of Carex lasiocarpa community in Sanjiang Plain in 1973, 1983 and 2003. The results indicated that with the process of succession, the association of species showed significantly positive correlation in each stage, and the sequence of association was in the order of 1983 〉 1973 〉 2003. The property of interspecific associations between the main species pairs, namely the proportion of positive and negative associations, remained unchanged. The proportion of the species pairs of significant association gradually increased; the association intensity of species pairs gradually strengthened. The association status or association degree of the same species pairs varied according to succession stage.