摘要
运用Ｌｉａｐｕｎｏｖ第二方法研究具有函数放养率或捕获率ｎ步食物链生态系统的稳定性，由此得到其全局稳定、大范围稳定、不稳定的判定条件，是很有理论和实践意义的．
Ecosystem stability of N paces food chain with raising rate or catching rate was researched by means of Liapunov method.The general stability and decision conditions of unstability were got,which is theorethical and pratical meaning.
