Abstract:in the present paper, the concepts of ecological potential and field gradient, whichdescribe the ecological field characters, were defined by means of long-term observation andmeasures of Aeurolepidium chinense population and its individuals as well as relevant theoreticalanalysis. The models for ecological potential and field gradient of aboveground part of A. chinense were put forward. The models were run by using experimental data. Regularity, bywhich the field potential and the field gradient of the abo...