对一类两种群均有收获率的具HollingⅡ类功能反应的食饵-捕食者系统作定性分析,利用常微分方程定性、稳定性及分支理论,得到此类生物捕食系统平衡点的性态和极限环存在和不存在的条件.%A qualitative analysis of a kind of food-predator system with two kinds of groups having harvest rate and Holling type Ⅱ functional response is considered by using ordinary differential equations characterization, stability and bifurcation theory.The quality of the equilibrium is discussed, and the conditions of existence and nonexistence of the limit cycle are obtained.
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