[目的] 研究徂徕山不同植被类型不同坡位的土壤团聚体特征，为北方土石山区植被建设和水土保持提供理论支撑。 [方法] 采用干筛和湿筛法分析徂徕山板栗林、刺槐麻栎混交林坡上及坡下的土壤团聚体组成与稳定性，并测定土壤固液气三相比及其结构距离。 [结果] ①机械稳定性团聚体组成中2～0.25 mm粒级所占比例为55.60%～72.76%，0.25～0.053 mm粒级所占比例为25.11%～41.98%，＜0.053 mm粒级含量最低，所占比例为0.60%～3.75%。 ②与板栗林相比，刺槐×麻栎混交林的土壤机械稳定性团聚体的平均重量直径提高10.51%，几何平均直径提高7.51%，不稳定团粒指数降低19.01%，而水稳定性团聚体各指标在不同植被类型及不同坡位均未表现出显著差异。 ③固液气三相体积比例表现为：土壤固相体积(56.46%～66.15%)＞液相体积(21.66%～36.56%)＞气相体积(4.40%～12.19%)，刺槐×麻栎混交林的土壤三相结构距离与板栗林相比约减少8.87%。 [结论] 植被类型对徂徕山土壤团聚体结构稳定性的影响大于坡位，其中刺槐×麻栎混交林对土壤团聚体机械稳定性的促进作用显著优于板栗林。固相体积比是解释团聚体组成的关键因子。
[Objective] The characteristics of soil aggregates under different vegetation types and slope positions of Culai Mountain were determined in order to provide theoretical support for vegetation construction and soil and water conservation in rocky mountain areas of North China. [Methods] The composition and stability of soil aggregates on and below the slope of Robinnia pseudoacacia×Quercus mixed forest and Chestnut forest of Culai Mountain were analyzed by dry sieve and wet sieve methods, and the soil solid-liquid-gas three phase rate and its structural distance were measured. [Results] ① The composition of mechanically stable aggregates accounted for 55.60%-72.76% for particle sizes of 2-0.25 mm, 25.11%-41.98% for particle sizes of 0.25-0.053 mm, and 0.60%-3.75% for particle sizes ＜0.053 mm. ② Compared with the Chestnut forest, the mean weight diameter of soil mechanical stability aggregates increased by 10.51%, geometric mean diameter increased by 7.51%, and unstable aggregate index decreased by 19.01% in the Robinia pseudoacacia and Quercus mixed forest. However, none of the indexes of water stabile aggregates showed significant differences under different vegetation types and slope positions. ③ Soil solid phase volume (56.46%-66.15%)＞liquid phase volume (21.66%-36.56%)＞gas phase volume (4.40%-12.19%). The soil three phase structure distance of Robinia pseudoacacia and Quercus mixed forest was reduced by 8.87% compared with that of Chestnut forest. [Conclusion] The influence of vegetation type on the structural stability of soil aggregates of Culai Mountain was greater than that of slope position, where the contribution of Robinia pseudoacacia and Quercus mixed forest to the mechanical stability of soil aggregates was significantly greater than that of Chestnut forest. The solid volume ratio was the key factor explaining the composition of soil aggregates.