本文给出了判断昆虫种群空间分布型时,Iwao模型中α、β允许偏离范围的一种新的统计推断方法。提出用t检验法即分别对α与0（当A=0）、β与1（当B=1）间的偏离度进行t检验。上式中,α、β为IwaoM—M回归模型中的系数,n为建模所用的样地数,M_i为第i个样地的平均拥挤度,M_i为第i个样地的平均密度。应用两个实例进行了检验,从而验证了该方法的适用性和可行性。此外,还讨论了该法适用的条件。 In this paper, we present a new statistical inference method for determining the allowable deviations of α and β in the Iwao model for the spatial distribution of insect populations. The t-test is proposed to test t-test for the deviation between α and 0 (when A = 0) and β and 1 (when B = 1) respectively. In the above formula, α and β are the coefficients in the IwaoM-M regression model, n is the number of plots used in modeling, M_i is the average degree of congestion in the i-th sample, and M_i is the average density in the i-th sample. Two examples are used to verify the applicability and feasibility of the method. In addition, the conditions for the application of the law are also discussed.