在3种松毛虫混合种群幼虫空间图式研究结果的基础上,按Iwao的方法,首先给出了种群密度的简易估计模型;利用Bechinski的方法,又建立起简易序贯抽样决策模型,简化了抽样过程,提高了决策分析的速度等。此外,还给出了再次改进的Iwao m-m模型的P-m关系,并就简易序贯抽样决策图的绘制进行了必要的讨论。 Based on the results of the spatial pattern analysis of larvae of three species of pine caterpillars, a simple estimation model of population density was given according to the method of Iwao. By using Bechinski’s method, a simple sequential sampling decision model was also established, which simplified Sampling process, improve the speed of decision analysis. In addition, the P-m relation of the improved Iwao m-m model is also given, and the necessary discussion of the drawing of the simple sequential sampling decision diagram is given.