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对大豆蚜的空间分布型进行了研究。１１组样本中有１０组符合负二项分布，１组属聚集分布，所有样本均不符合泊松、奈曼（ｎ＝０～４和ｎ＝∞）、泊松二项、复合泊松分布。大豆蚜空间分布基本成分为个体群的聚集分布，聚集程度随密度的增加而提高。利用大豆蚜种群的空间格局参数ｍ、ＣＡ、Ｉδ、ｍｘ、α、β和种群聚集均数λ值，分析了大豆蚜种群聚集的原因，估计了个体群平均大小及其与平均密度的关系。通过Ｔａｙ－ｌｏｒ的指数回归式参数确定了在一定精确度水平下的理论抽样数和序贯抽样公式：理论抽样数ｎ＝５．３６４１ｘ－０．６４Ｄ２，序贯抽样截止线Ｔｎ＝１３．８Ｄ３．１２５·ｎ０．５６３。
The spatial distribution of soybean aphid was studied. Among the 11 samples, 10 groups were negative binomial distribution and 1 group was aggregated distribution. All samples did not fit Poisson, Neyman (n = 0 ~ 4 and n = ∞), Poisson binomial, complex Poisson distribution . The spatial distribution of soybean aphids is the basic component of the aggregation distribution of individual groups, the degree of aggregation increases with increasing density. Based on the spatial pattern parameters m, CA, Iδ, mx, α, β of the soybean aphid population and the λ value of population aggregation, the reasons for the population aggregation of soybean aphid were analyzed, and the relationship between the average population size and average population size was estimated. By Tay-lor index regression parameters to determine the level of accuracy in a certain number of theoretical and sequential sampling formula: the number of theoretical sampling n = 5.3641x-0.64D2, sequential sampling cut-off line Tn = 13.8D3 .125 · n0.563.