【摘要】 本文针对毛乌素沙地中广泛分布的两个人工林——杨柴林和沙柳林,通过采用土壤物理分析测定法,研究了其沙地的颗粒组成状况和水文常数。结果表明:受颗粒组成状况的影响,杨柴林沙地的最大吸湿量为:上层(0～150cm深)0.776％,下层(150～200cm深)1.504％,田间持水量为3.412～4.381％,凋萎湿度为0.781％(植物为杨柴),沙柳林沙地迎风坡、丘顶和背风坡的最大吸湿量为:上层0.796～0.872％、下层1.505～1.518％,田间持水量为3.458～4.903％,凋萎湿度为0.916～0.937％。这些数值直接表明了毛乌素沙地的水文常数值小的基本特征。更多还原

【Abstract】 Focused on the hudrologic constants of sandy lands in Maowusu Sands,which were covered by artificial Hedysarum leave Shrub and Salie psammophila Shrub,the paper measures the mechanical composition and hydrologic constants were measured with methods of soil physics. The results showed:For the sandy land covered by Hedysarum leave Shrub,its maximum hydroscopioity was 0. 776% in the upper-stratum (depth:0-150 cm) of its profile and 1. 504% in the substratum respectively,its field capacity was 3. 412-4. 381% and its wilting percentage was 0. 781% (to Hedysarum leave). For the windward side,top and leeward side of dune covered by Salix psammophila Shrub,its maximum hydroscopicity was 0. 796-0. 872% in the upper-stratum of its profile and was 1. 505-1. 518% in the substratum respectively,its field capacity was 3. 458-4. 903% and its wilting percentage was 0. 916-0. 937%. These numbers indicated the common characteristics of sandy land in Maowusu Sands with the less hydrologic constants.更多还原