马尾松毛虫种群动态模拟研究

马尾松毛虫种群动态模拟研究马小明（北京大学环境科学中心北京１００８７５）关键词马尾松毛虫，种群动态，平衡点，摸拟马尾松毛虫是我国南方马尾松林的主要害虫，其发生的面积广，造成的损失大。因此，对其种群动态的研究不但具有昆虫种群生态学的理论意义，而且对害虫...

A STUDY ON THE POPULATION DYNAMICS SIMULATION OF DENDROLIUS PUNCTATUS

According to characters of the relation between the population dynamics of Dendrolimus punctatus and the related environment and Nicholson-Bailey Model,this paper recommends a timedelay structure and stable control item,and establishes a simulation model of Dendrolimus punctatus population dynamics with difference equation methods.Based on the model,the mechanism of the population dynamics is discussed. Following results are obtained:the stronger the ability for the pest control by forest itself,the lower the equilibrium position of the population is and the better the stability is;the larger the inner growth rate of the population,the higher the equilibrium position is and the worse the stability is.