通过单独饲养和混合饲养,研究了种间竞争对七星瓢虫和异色瓢虫种群数量增长的影响,并用Lotka-Volterra种间竞争模型对两种瓢虫在猎物相对充足与不足条件下的种间竞争进行模拟。结果表明,单独饲养时,异色瓢虫的种群增长数量大于七星瓢虫;混合饲养时,七星瓢虫的种群增长数量在猎物相对充足时大于异色瓢虫,而猎物相对不足时,七星瓢虫的种群增长数量小于异色瓢虫。在两种瓢虫的种间竞争中,异色瓢虫相对占优势,竞争的结局是二者可以形成一个稳定的平衡局面而得以共存。 The effects of interspecific competition on the population growth of ladybird ladybird and ladybird ladybird were studied by single feeding and mixed feeding. Species of ladybird ladybird and ladybird ladybird were studied with Lotka-Volterra interspecific competition model. Inter-competition simulation. The results showed that the number of population of Harmonia axyridis increased more than that of C. nivalis alone when feeding alone. When mixed feeding, the population growth of C. nivalis was larger than that of C. multicolor when the prey was relatively sufficient, while when the prey was relatively insufficient, Insect population growth is less than the number of ladybirds. In the interspecific competition between the two ladybugs, C. heterochina predominates and the competing outcome is that the two can coexist in a stable equilibrium.