宽垄沟灌覆膜条件下土壤水分侧向入渗特性

Lateral Infiltration of Soil-water Movement Characteristics of Film-mulched Wide Ridge and Furrow Irrigation

在大棚内模拟宽垄沟灌垄上覆膜栽培条件以及灌水方案，采用中子仪进行水分观测，研究宽垄沟灌模式下灌水前后水分在垄沟间侧向入渗特性。试验结果表明，在本试验条件下，水平向及垄背垂直向含水量梯度的存在导致水分侧向及向垄背的补给明显，垄背剖面的2个观测点表层，灌水前其含水量不足田间持水量的70％，灌水后垄沟水分的侧向入渗，使该二测点表层土壤含水量呈上升趋势，17d后其平均含水量能达到田间持水量的7S％～80％之间。

In order to observe the water lateral infiltration between ridge and furrow, this experiment simulated the condition of film-mulched wide ridge and furrow irrigation and that of irrigation plan, used neutron probes to observe water content. The results show that, because the water content gradient in lateral and ridge＇s vertical result in obvious lateral infiltration and water supply to ridge, the surface layer of two observation point in ridge section, each water content is less than 70% of field capacity before irrigation, then to 75%-80% after 17 d.