中连川小流域土壤水分物理特征及其与地形条件的关系  

Moisture properties in soil profiles and their relation to landform at Zhonglianchuan small watershed

作　　者：史竹叶[1] 刘文兆[1] 郭胜利[1] 李凤民[2] 

机构地区：[1]中国科学院水利部水土保持研究所西北农林科技大学资源与环境学院 [2]兰州大学生命科学学院

出　　处：《干旱地区农业研究》2003年第4期101-104,共4页Agricultural Research in the Arid Areas

基　　金：973"预研究项目"半干旱黄土区植被景观覆盖与农业生态系统功能调控";国家自然科学基金项目(90202011)资助

摘　　要：在中连川流域从梁顶到沟底选取5个位置,按发生层采集土样,测定剖面土壤水分物理性状,分析了地形因素对这些性状的影响。结果表明,中连川流域土壤粗粉粒(0.05～0.02mm)含量平均为47.9%,细粉粒(0.02～0.005mm)含量平均为24.9%,<0.01mm物理性粘粒含量平均为28.0%。土壤剖面的物理特性因坡位呈现一定差异:坡顶、坡面的土壤粗颗粒显著高于坡脚,而土壤细颗粒显著低于坡脚,致使土壤水分特性也呈相应变化。Analysis about soil water properties of the soil profiles along the transection of shoulder to footslope and their relation to landform were made on the Zhonglianchuan watershed in a semiarid and loess hilly area. The results showed that the content of coarse silt (0.05～0.02 mm), fine silt (0.02～0.005 mm), and clay (<0.01 mm ) were 47.9%, 24.9% and 28.0%, respectively. Soil physical clay content followed the order of backslope < shoulder < footslope, which correspondingly influenced the soil water properties.

关 键 词：中连川小流域 土壤水分物理特征 地形 土壤颗粒 

分 类 号：S152.7[农业科学—土壤学]