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提出了应用灰色关联度分析关键因子的新方法．该方法具有整体性、非对称性、有序性、动态性计算方法简便等优点，因此，它能准确地判断出关键因子，并显示出其他因子的相对重要性。文中以青杨天牛生命表资料为例进行了例证研究。选用了几种害虫的生命表资料进行了灰色关联序与其他分析方法排序的比较，证实了灰色关联度分析法的正确性与实用性，为分析影响害虫种群动态的关键因子提供了更为有力的手段。
A new method of applying gray relational degree to analyze the key factor is proposed. The method has the advantages of integrity, asymmetry, orderliness and simple dynamic calculation method. Therefore, it can accurately determine the key factors and show the relative importance of other factors. In this paper, the case study of the life table of Qingyang Tian cattle was taken as an example. The life table data of several pests were selected to compare the gray relational order with the ranking of other analysis methods. The correctness and practicability of the gray relational analysis method were confirmed. This provided a more powerful force for analyzing the key factors affecting the pest population dynamics s method.