Evaluation of the Eco-environment for Chinese Chestnut By Gray System Theory
应用灰色系统理论评判板栗生态环境

Gray incidence coefficients was used in this paper to analyse the ecological environment for Chinese Chestnut in Hebei Province.From the analysis results the total area was divided into four kinds of eco-environment for this plant.This result is nearly the same with the result from fuzzy cluster analysis,but it is comparative scientific,simple and easier.