This research aimed at the management of Taxus cuspidate stand by selecting suitable models for imitating diameter structural distribution of coniferous broad-leaved mixed forest in T.cuspidate stand， Changbai Mountain Nature Reserve. On the basis of 15 coniferous broad-leaved mixed forest in T.cuspidate stands in Longhuanggou Forest Farm， Changbai Mountain Nature Reserve， negative exponential model， three-parameter Weibull model and χ2 test were used to analyze the diameter structural distribution of 15 plots. The density of 15 plots was 400-981 trees·hm-2， and the mean DBH was 10.5-19.9 cm. The skewness of all plots was positive， which showed the diameter distribution function curves was partial to left. The three-parameter Weibull distribution model was better for the diameter distribution of the 9-11 plots， while negative exponential model was suitable for other plots. The irregular diameter distribution can be fitted better by three-parameter Weibull model， while the inverse J-shaped curves can be fitted well by negative exponential model. It showed that the diameter structure of coniferous broad-leaved mixed forest of Taxus cuspidate stand in the study area were not reasonable， and the management of T.cuspidate stand should be strengthened.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2021.01.012