摘要
本文采用扩散系数(C)、聚集指数(I)、扩散型指数(Iδ)聚集度指标(M*/X)、K值、C_A值以及Iwao的平均拥挤度(m*)与平均密度(X)回归和Tayor的方差(S^2)与均数(X)幂回归等方法,测定了冬麦起身拔节期齿须微蛛、弱小皿蛛、狼蛛的空间分布型。综合各项结果,三种蜘蛛均属聚集分布,其聚集原因是环境条件所引起的。
This paper deals with the distribution of Erigone dentipalpis, Microlingphia pusilla and Lycosa spp.. which are natural enimies of the pests in winter wheat field. Several methods, aggregation indices C, I, K,C_A, I_δ, m*/X, Iwao's m*-X linear regression and Taylor's S^2-X power regression were used to test the distribution patterns of these pupulation. The result showed that the distributed patterns of these spiders belong generally to aggregated distribution pattern.
