In order to study the effect of homogeneous management on the diameter-class structure of Pinus tabulaeformis plantation,a 48a plantation was selected as the research object,and the standard measuring scale per tree was set.Normal distribution function,Weibull distribution function,lognormal distribution and Logistic distribution were used to fit the diameter-class distribution of Pinus tabulaeformis plantation,and χ2 test was performed.The results showed that the Logistic distribution of uniform and control stands had the best fitting effect,but there were differences.The deviation to the right of the diameter and rank distribution in homogeneous man-agement was greater than that in control,and the number of medium diameter and rank trees in homogeneous management was greater than that in control.Homogeneous management has a certain effect on the diameter class structure of Pinus tabulaeformis plantation and has a certain guiding significance for the artificial directional cultivation of large diameter wood in Pinus Tabulaeformis plantation.
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