【摘 要】
：
利用黄土丘陵区燕沟流域42场模拟降雨下土壤水分观测数据,研究2种坡度的草地、灌木地在不同经营方式（原状地、刈割地、翻耕地）下的土壤水分对模拟降雨的响应。结果表明：（1）在5次降
【机 构】
：
忻州师范学院地理系,中国科学院水利部水土保持研究所
论文部分内容阅读
利用黄土丘陵区燕沟流域42场模拟降雨下土壤水分观测数据,研究2种坡度的草地、灌木地在不同经营方式（原状地、刈割地、翻耕地）下的土壤水分对模拟降雨的响应。结果表明：（1）在5次降雨补充下,依据土壤水分的标准差和变异系数,0~100 cm土壤水分受土地经营方式影响表现为：原状草灌地土壤水分可划分为活跃层、次活跃层和相对稳定层;刈割地全剖面为相对稳定层,翻耕地可分为活跃层和相对稳定层。（2）单次降雨事件则随降雨量增加,各经营方式下的水分活跃层逐渐变薄或消失,次活跃层变厚,而相对稳定层变薄,整个土壤剖面水分变化趋
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