【摘要】 为探究液肥系统深施作业下土壤水分入渗湿润体运移变化规律,采用HYDRUS数值模拟的方法。选取不同系统压力、注肥深度、土壤质地3个因素进行试验,研究以上3因素对深施作业下液肥中水分入渗的影响。结果表明:湿润体形态大小和湿润锋运移距离与系统压力成正相关,与土壤质地的黏重程度呈负相关,与注肥深度无显著关系,但湿润体的空间分布与注肥深度呈正相关;不同方向土壤湿润锋运移距离与注肥时间都呈显著幂函数关系,且在相同注肥时间内均符合垂直向上>垂直向下>水平方向的规律。更多还原

【Abstract】 In order to explore the law of soil moisture infiltration and wet body movement under deep application of liquid fertilizer system, HYDRUSnumerical simulation method was adopted. Three factors was selected, including different system pressure, fertilizer injection depth, andsoil texture, to conduct experiments to study the effects of the above three factors on the infiltration of water in liquid fertilizer under deepapplication. The results show that the size of the wet body and the distance of the wet front migration are positively correlated with systempressure, negatively correlated with the degree of soil texture stickiness and not significantly related to the depth of fertilizer injection,while the spatial distribution of the wet body is positively correlated with the depth of fertilizer injection, the distance of soil wet front move-ment in different directions and the time of fertilizer injection all showed a significant power function relationship, and the law of verticalupward>vertical downward>horizontal direction was accorded with the same fertilizer injection time.更多还原