Abstract: The field characteristic function (ecological potential) and its two-dimensional graphs ofaboveground ecological field of A.chinense are studied through fixed field experiments andtheoretical modelling analysis. The results show that the action strength of abovegroundecological field of A.chinense is positively related to its relative growth rate and to the extinction coefficient of ecological potential, but negatively to the utilization efficiency of lo cational resources. Population density affects the ecological potential of individuals, and two-dimensional graphs can reflect the dynamic characteristics of ecological field behavior.

Key words: Ecological field, Ecological potential, Aneurolepidium chinense