摘要
对一类具有稀疏效应的生态系统模型，给出了唯一正平衡点全局渐近稳定的充分条件等一些定性性质的判别准则和生态意义。
In this paper,a class of predator- prey system with sparse effectis discussed .The sufficient condition for unique positive equilibrium pointis asymptotic stable over a large range and some biological illustrations are obtained .The phase space and the changing range of parameters are wide .
