中文摘要：

利用室内定水头入渗法，观测三峡不同森林地段烘干土的入渗性能，比较大孔隙域与基质域烘干土入渗的差异，探究影响烘干土入渗性能的原因，评价常用入渗模型对不同属性烘干土壤入渗过程的适宜性。结果表明：三峡库区各森林地段基质域A层土壤的入渗能力强于B（或C）层土壤，B（或C）层土的40min累积入渗量只占到A层土的29．79％-45．07％；不同林型覆盖下基质域烘干土壤人渗能力相比较，温性落叶阔叶林山地棕壤〉常绿落叶阔叶混交林山地黄棕壤〉暖性针叶林山地黄壤〉常绿阔叶林山地棕红壤，温性落叶阔叶林山地棕壤40min的累积入渗量是常绿阔叶林山地棕红壤的32．08-48．53倍。大孔隙域烘干土的人渗速率亦符合先下降后趋于稳定的一般入渗规律，大孔隙域比基质域烘干土的入渗性能更好，其40min累积入渗量可以达到基质域的0．99-2．95倍。三峡库区森林烘干土的入渗能力与土壤容重和土粒密度呈极显著负相关关系（P〈0．01），与土壤通气孔隙度（〉0，02mm）和有机质含量呈极显著正相关关系（P〈0．01）。方正三通用公式对于基质域A层土和大孔隙域烘干土的入渗过程拟合效果较好，Horton方程对于基质域B（或c）层烘干土的入渗过程有较高的拟合度。

英文摘要：

This study used the constant waterhead infiltration method to compare the infiltration characteristics of homogeneous oven-dried soils in different mountain forest districts of Three Gorges Reservoir area. Our objectives were to explore the infiltration differences of oven-dried soils between macroporous and in homogeneous domain and to evaluate the suitability of infiltration models during the infiltration process of different oven-dried soils. The results showed that the infiltration capacity of topsoil was better than that of subsurface soil of homogeneous domain and the cumulative infiltration volume within 40 minutes at subsurface soil accounted for 29.79% - 45.07% of that at topsoil. Among different soil types in homogeneous domain, soil infiltration capacity decreased by the order： mountain brown soil covered with temperate deciduous broad-leaved forest - in mountain yellow brown soil covered with mixed evergreen-deciduous broad-leaved forest 〉 mountain yellow soil covered with warm coniferous forest 〉 mountain brown red soil covered with evergreen broad-leaved forest. The cumulative infiltration volume within 40 minutes in mountain brown soil covered with temperate deciduous broad-leaved forest was 32.08 - 48.53 times of that of mountain brown red soil. The infiltration rate of oven-dried soil in macroporous domain was also accordance with general infiltration law that the curve firstly descended but gradually became steady. Soil infiltration capacity in macroporous domain was better than that in homogeneous domain. And the cumulative infiltration volume within 40 minutes into soils in macroporous domain was 0.99 - 2.95 times that in homogeneous domain. Infiltration capacity of forest soils in Three Gorges Reservoir area had negative correlation with soil bulk density and soil particle density （P 〈 0.01）, but had positive correlation with aeration porosity （ 〉 0.02 mm） and soil organic matter content （P 〈 0.01）. Fangzhengsan equation best simulated topsoil in homogeneous domain and