膜孔肥液单向交汇入渗水、氮运移特性试验研究  

Research on Water and Nitrogen Transport Characteristics under Single-line Interference Film Hole Infiltration of Fertilizer Solution

作　　者：董玉云[1,2] 王宝成[1] 费良军[3] 

机构地区：[1]兰州交通大学,兰州730070 [2]甘肃省道路桥梁与地下工程重点实验室,兰州730070 [3]西安理工大学水资源研究所,西安710048

出　　处：《中国农村水利水电》2015年第6期91-94,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(50579064);长江学者和创新团队发展计划项目(IRT 1139);兰州交通大学"青蓝"人才工程基金项目(QL-08-20A)

摘　　要：通过室内试验,研究了膜孔肥液单向交汇入渗土壤水分及NO-3-N的分布特性与运移规律。研究表明,供水入渗过程中,相同深度处膜孔中心垂向的土壤含水率大于交汇中心垂向的土壤含水率;土壤NO-3-N浓度锋运移距离和最大值随入渗时间的延长而增大。再分布过程中,土壤剖面含水量的最大值随再分布时间的延长而逐渐减小,整个湿润土体的土壤含水率随时间的延长变得相对均匀;NO-3-N浓度锋运移距离继续增大,而NO-3-N浓度最大值逐渐减小。Based on lab experiments ,the distribution characteristics and transport law of soil water and NO3^- -N under single-line in‐terference film hole infiltration were studied .The results show that soil water content of film hole center is bigger than that of inter‐ference center at the same deep in the process of water supply .The concentration front transport distance of NO3^- -N and the maxi‐mum value of NO3^- -N concentration increase with increased time .In the process of redistribution ,the maximum value of soil water content decreases with increased time and soil water content of the whole wetting body becomes relatively even .The concentration front transport distance of NO3^- -N increases with increased time and the maximum value of NO3^- -N decreases .

关 键 词：膜孔灌 肥液入渗 单向交汇 水、氮运移特性 

分 类 号：S152.72[农业科学—土壤学]