摘要
探讨了在田间采用模拟降雨方法和不同的蓄水耕作措施所得到的不同田面土壤条件下,在降雨入渗过程中土壤含水量、不同深度土壤水吸力、入渗量、入渗速率和径流量的变化规律。建立了一维入渗模型,并对3种田面条件下土壤水的入渗性能进行数值计算和理论分析。试验和计算结果表明,在相同降雨强度下深松处理田面的入渗速率和积累入渗量最大,开槽处理次之,免耕情况最差。
A rainfall simulator is employed in the field experiments with 3 soil surface treat- ments:deep tillage,drill tillage and no tillage.The experimental results consist of the effects on the soil moisture content,suction in different depth,cumulative infiltration and runoff. Infiltration model of one dimension is developed and utilized to calculate the infiltration rates of the different treatments.The experimental data was tabulated and graphed.It shows that the soil surface with the treatment of deep tillage has the maximum infiltration rate or cumu- lative infiltration,and the treatment by drill tillage is better result than that of no tillage.
基金
中国科学院禹城综合试验站的开放课题
关键词
降雨
入渗量
耕作
入渗速率
土壤
infiltration rate
cumulative infiltration
soil surface treatment
tillage engineering
