十一星瓢虫与蚜虫数量关系的种群动力学研究

Population Dynamics Research in Quantity Relationship of Coccinella Undecimpunctata Linnaeus and Aphis Gossypii

对新疆棉区十一星瓢虫与蚜虫相关调查和实验数据,按照种群动力学理论,建立具有阶段结构的种群动力学模型,探讨外界环境对生物种群之间的影响.结果表明:蚜虫内禀增长率越高,则蚜虫种群增长速度越快,峰值越大且所需的时间也越短.随着棉珠的单株最大容蚜量的增大,棉蚜爆发的时间不断推迟.而温度对瓢虫的转化率和死亡率的影响使得蚜虫爆发的时间和峰值有明显的区别.瓢虫和蚜虫的种群变化具有明显的跟随关系.

According to the population dynamics theory, we applied ecological model for survey andexperimental data about coccinella undecimpunctata linnaeus and aphis gossypii, established a predator-prey population dynamical model with age-structure about them to discuss external environment impact on biotic population. The more intrinsic rate of increase, the more quickly growth, the bigger peak and the shorter time the aphis gossypii will reach. The maximum number of aphis on cotton plant gets bigger, bursting time of aphis delayed constantly. Changing temperature on them differentiate the bursting time and peak of aphis obviously. The coccinella undecimpunctata and the aphis has the obvious follow relations.