Based on the data of tree location mapping and size measured in a 0.96 hm2 plot of secondary evergreen broadleaved forest in Huitong County,Hunan Province,Hegyi's competition index model was used to investigate intraspecific and interspecific competition intensity for dominant species trees.The results show that competition intensity of the top 13 dominant plant species was ranked in the order of Pinus massonianaMachilus pauhoiStyrax suberifoliusLitsea coreana var.lanuginoseAlniphyllum fortuneiClethra fargesiiLiquidambar formosanaCyclobalanops...