川西亚高山暗针叶林土壤渗透性能研究

对川西亚高山针叶林土壤渗透性能进行研究，结果表明:（1）林地表层土壤（0-30 cm）滞留贮水量受土壤容重、孔隙度及林龄影响显著。天然冷杉林土壤滞留贮水量变化范围为593.7~694.2 t/hm²，大小排序为:185 a>80 a>40 a生。人工云杉林175.8~545.1 t/hm²，从大到小依次为40 a>30 a>25 a>20 a。（2）天然林初渗率为10.6~30.1 mm/min，最大为80 a生冷杉林；稳渗率为3.3~6.4 mm/min，185 a生冷杉林为最大。人工林土壤初渗率为2.7~8.3 mm/min，稳渗率1.9~5.4 mm/min，两指标中均以40 a生云杉林为最大。（3）构建了土壤渗透过程回归方程，拟合度R²为0.869~0.959，表明回归方程可以较好地反映各试验标准地土壤入渗过程。

Soil Permeability Capability of Subalpine Coniferous Forests in Western Sichuan, China

The study on soil permeability of subalpine coniferous forests was carried out in western Sichuan, China. The results showed that:(1)In 0-30 cm soil layer, the non-capillary water capacity(NCWC) is affected strongly by soil bulk density, porosity and age of forests. The NCWC in natural forests ranged 593.7~694.2 t/hm², and capacity sequence is 185 years> 80 years > 40 years old. The NCWC ranged 175.8~545.1 t/hm² in plantation forests, and the sequence is 40 years > 30 years > 25 years > 20 years old spruce.(2)The soil initial permeability rates of natural forests varied 10.6~30.1 mm/min, the highest one is 185 years old forests of fir; steady-state permeability rates ranged 3.3~6.4 mm/min, the highest one is 185 years old forests of fir. The IPR and SPR in plantation forests changed 2.7~8.3 mm/min and 1.9~5.4 mm/min respectively and the highest velocity of both is 40 years old forests of spruce.(3)Constructing soil permeability regression model and its fitting degree is 0.869~0.959, which shows that equation analog could reflect the process of each plots in this research.