【摘要】 本文以棉蚜为例,提出了蚜虫种群数量动态的通用模型,指出蚜虫在一年的生活周期中,从数量动态上可分为几个小周期.每个小周期皆由一个上升段及一个下降段构成,并且上升段是由逻辑斯蒂方程来描述,下降段是由反逻辑斯蒂方程来描述.最后用实际数据进行了拟合,说明其正确性与普遍性.更多还原

【Abstract】 This paper put forward aphid population numerical dynamical general model with example of cotton aphid,and indicated that aphid’s year periodicity can be divided several little periodicities,each of which includes one up-phase and down-phase.The up-phase is de- scribed with Logistic curve,but the down-phase with antilogistic curve.Lastely the paper gave some data to fit it and demonstrated its correction and universal.更多还原