肥液浓度对膜孔单向交汇入渗湿润体特性的影响研究

Study on the Influence of Fertilizer Solution Concentration on Wetting Body Characteristics under Film Hole Single-line Interference Infiltration

通过清水与不同肥液浓度的膜孔单向交汇入渗室内试验,研究了不同浓度的肥液膜孔入渗湿润锋运移特性,建立了湿润锋运移距离与入渗时间的模型,提出了膜孔湿润锋运移距离随肥液浓度的增加而增大的规律;建立了由清水湿润锋运移参数和肥液浓度推求肥液入渗膜孔中心和交汇中心垂直湿润锋运移距离的模型,经实测资料验证表明,模型精度均较高;建立了膜孔单向交汇入渗交汇时间与肥液浓度之间的指数函数模型。该研究成果为进一步进行膜孔灌溉技术研究奠定了科学基础。

Based on lab experiment, transport characteristics of wetting front with different fertilizer solution concentration under single-line interference infiltration of film hole irrigation were researched. Models for transport distance of wetting front and infiltration time were established, the law of transport distance of wetting front increased with the increased solution concentration were presented. Models for transport distance of wetting front of film hole center and interference center by rinsing wetting front transport parameters and solution concentration were established, the calculation of the models were verified by observed data. Exponential function model for interference time and fertilizer solution concentration of single-line interference were developed. The results provided scientific foundation for further study of film hole irrigation.