黄土丘陵沟壑区鱼鳞坑雨季土壤水分状况  

Soil moisture of fish-scale pit during rainy season inLoess hi1ly and gully region

作　　者：李萍[1] 朱清科[1] 赵磊磊[1] 常存[1] 周毅[1] 

机构地区：[1]北京林业大学水土保持与荒漠化防治教育部重点实验室,北京100083

出　　处：《农业工程学报》2011年第7期76-81,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：林业科技支撑计划专题2006BAD03A0302

摘　　要：在黄土高原半干旱地区,降水是限制植被生长的主要限制因子。鱼鳞坑作为一种集水措施在人工造林中被普及推广。为研究鱼鳞坑雨季的集水功能,对样地鱼鳞坑内部、上部及侧面坡面典型部位的土壤水分进行了连续性监测,结果显示:7—8月,鱼鳞坑内的平均土壤含水量维持在低于鱼鳞坑外部坡面的水平;鱼鳞坑内20～40cm土层是土壤水分的主要利用层,鱼鳞坑的集雨效果表现在40～60cm土层上;单个鱼鳞坑的集雨效果存在差异性,这种差异性主要表现在有径流产生的降雨期。单个鱼鳞坑的集雨效果受鱼鳞坑的布置模式、施工工艺等因素的影响。In semi-arid of the Loess hi1ly and gully region,the precipitation is the main limited factor for vegetation growth.The fish-scale pit has been popularized as one kind of runoff catchment measure.In order to study the catchment function of fish-scale pit in rainy season,continuous monitoring of soil moisture was carried out on the typical spots.The results showed that during July and August,the average soil water contents inside the fish-scale pits were below the levels of external slope;the 20-40 cm soil layer in the fish-scale pits was the main use of soil water,and the 40-60 cm soil layer was the main runoff catchment;the effect of each fish-scale pits was different,which was mainly in the runoff periods.As a result,the catchment effect of each fish-scale pits was influenced by layout mode,construction technology and other factors.

关 键 词：土壤含水量 集雨 径流 鱼鳞坑 土层 

分 类 号：S225.912[农业科学—农业机械化工程]