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应用分形理论中的信息维数 (Informationdimension)和关联维数 (Carrela tiondimension)研究了三江平原小叶章 (Deyeuxiaangustifolia)种群分布格局特征。结果表明 :信息维数在 5～ 9月分别为 1 .494、1 .70 9、1 .6 42、1 .5 5 3、1 .6 2 5 ,表明其结构较复杂 ,格局强度较高。关联维数则为 1 .6 6 2、1 .86 1、1 .76 6、1 .75 0、1 .80 7,说明小叶章个体空间相关程度较高。种内竞争强烈 ,对空间有较强的占据能力。两个维数的季节动态均自 5月至 6月达到极大值 ,而后逐渐下降 ,至 9月略有回升。
The distribution characteristics of population of Deyeuxia angustifolia in the Sanjiang Plain were studied using information dimension and correlation dimension of fractal theory. The results show that the information dimension in the period from May to September is respectively 1.944, 1.70 9, 1.262, 1.535, 1.626, indicating that the structure is complex and the pattern intensity is high. The correlation dimension was 1.66 2,1 .86 1,1 .76 6,1 .75 0,1 .80 7, indicating that there was a high degree of spatial correlation in individuals of C. tabulaeformis. Strong intraspecific competition, the space has a strong ability to occupy. The seasonal dynamics of the two dimensions both reached the maximum value from May to June, then gradually declined and rose slightly to September.