摘要
对黄土高原丘陵沟壑区土壤水分变化规律研究结果表明 ,该区土壤水分随时间变化主要受控于降水量 ,表现为与降水量变化同步。土壤水分垂直分布变化 0～ 30cm土层土壤含水量随深度增加而减少 ,30～ 1 2 0cm土层土壤含水量随深度增加而增加 ,总体变化趋势平缓。裸地和农田土壤水分空间变异范围分别为 3.1 7m和 7.2 5m。
The dynamic laws of soil moisture in hilly areas of the Loess Plateau are studied in this paper. The results show that the precipitation is the most important factor to determine the temporal change of soil moisture; the soil moisture decreases from 0cm to 30cm and increases from 30cm to 120cm and the total changing trend is slowly; the ranges of spatial variability of soil moisture for bareness and farmland are 3.17m and 7.25m respectively.
出处
《中国生态农业学报》
CAS
CSCD
2004年第3期47-50,共4页
Chinese Journal of Eco-Agriculture
基金
国家重点基础研究 ( 973 )发展规划项目 (G19990 43 60 5 )资助
关键词
黄土高原
丘陵沟壑区
土壤水分
变化规律
Soil moisture, Hilly areas of the Loess Plateau, Spatial variability
