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通过室内膜孔肥液多向交汇入渗试验,研究了肥液入渗下湿润锋的运移特性,建立了湿润锋运移距离与入渗时间的经验模型。试验显示,交汇界面处的垂直湿润锋运移速率大于膜孔中心处垂直湿润锋运移速率;膜孔多向交汇入渗交汇界面的湿润锋形状近似于半椭圆型,并建立了湿润锋形状的纵剖面方程,研究了湿润体内土壤含水率的分布规律。研究成果可为进一步进行膜孔灌溉技术研究提供参考。
Through the multi-directional infiltration experiments of indoor fertilizer solution, the migration characteristics of wetting front under the infiltration of fertilizer were studied, and the empirical model of migration distance and infiltration time of wetting front was established. The experimental results show that the migration rate of vertical wetting front at the interface is larger than that of vertical wetting front at the center of the film hole. The shape of the wetting front at the interface of multi-directional infiltration infiltration of the film hole is similar to that of the semi-oval, Longitudinal profile equation of wet soil moisture distribution of the law. The research results can provide reference for the further research of membrane hole irrigation technology.