【摘要】 在划分立地等级的基础上，探讨冀北山地油松人工林目标树采伐年龄的确定方法，为油松目标树全周期精准经营提供科学依据。本研究以河北省木兰围场国有林场油松人工林中的优势木代替目标树进行生长分析，采用32株树干解析的数据，选取7种常用理论生长方程，确定最优导向曲线，通过优势木树高划分3种立地等级。选定最优胸径生长方程，预设3种不同的目标直径(30、40、50 cm),比较确定各立地等级目标树的最佳目标直径与采伐年龄。研究结果表明：(1)Richards方程为最优导向曲线，划分的3种立地等级分别为立地等级Ⅰ(11～13 m)、立地等级Ⅱ(8～10 m)、立地等级Ⅲ(5～7 m)。(2)Korf方程为最优胸径生长方程；目标树的最优目标直径为40 cm。(3)根据优势木生长确定立地等级Ⅰ的采伐年龄为65 a,立地等级Ⅱ的采伐年龄为95 a,立地等级Ⅲ的油松生长不到目标直径，不能进行目标树培育。更多还原

【Abstract】 On the basis of site classification, this study explores the determination method of tree harvest age for Pinus tabuliformis plantations in northern Hebei mountainous regions, thus to provide a scientific basis for precise whole-cycle management of target trees. Using dominant trees in Pinus tabuliformis plantations of Mulanweichang State-owned Forest Farm in Hebei province as substitutes for crop trees, growth analysis was conducted based on stem analysis data from 32 trees. Seven commonly used theoretical growth equations were selected to determine the optimal guide curve, and three site classes were classified according to the height of dominant trees. The optimal growth equation of diameter at breast height(DBH) was selected, and three preset diameters(30, 40, and 50 cm) were compared to determine the optimal target diameter and harvest age for target trees in each site class. The results showed that: 1) The Richards equation was the optimal guide curve, and the three classified site classes were: site class Ⅰ(11-13 m), site class Ⅱ(8-10 m), and site class Ⅲ(5-7 m); 2) The Korf equation was the optimal DBH growth equation, and the optimal target diameter for target trees was 40 cm; 3) Based on the growth of dominant trees, the harvest age for site class Ⅰ was determined to be 65 years, while that for site class Ⅱ was 95 years. Trees in site class Ⅲ cannot reach the target diameter, making them unsuitable for crop tree cultivation.更多还原