入渗水头对膜下小管岀流垄沟灌土壤水分运移影响  

The Effects of Infiltration Heads on the Soil Water Movements Under Film Mulched Ridge-furrow Irrigation with Small Tubes

作　　者：马超 张运鑫[1] 程东娟[1] 王利书[1] 胡浩云[1] 李菲[1] 张策 

机构地区：[1]河北工程大学水利水电学院,河北邯郸056021

出　　处：《中国农村水利水电》2017年第12期22-26,共5页China Rural Water and Hydropower

基　　金：河北省自然基金项目(E2016402169);国家粮食丰产增效科技创新重点专项“黄淮海北部小麦-玉米周年控水节肥-体化均衡丰产增效关键技术研究与模式构建”课题五;河北省科技支撑计划项目“设施蔬菜水肥时空施用阈值及改良土壤技术研究”(17226914D)

摘　　要：通过室内不同入渗水头的膜下小管岀流垄沟灌自由入渗试验,研究了入渗水头对土壤水分运移的影响。试验为3个不同入渗水头(3、4、5 cm)的膜下小管岀流垄沟灌和入渗水头为4 cm的膜下垄沟滴灌(CK),结果表明,在灌水期间,累积入渗量和湿润锋运移距离随着时间的延长而增加;相同入渗时间,随着入渗水头的增加,累积入渗量增加,湿润锋水平运移距离逐渐增大,而垂直运移距离逐渐减小;随着距垄沟中心距离的增加,土壤含水率减小,但土壤含水率的分布均匀度随着入渗水头的增加而增大。以上研究结果可为膜下小管岀流垄沟灌的推广使用提供依据。Through indoor infiltration experiments of different infiltration heads under film mulched ridge-furrow irrigations with small tubes, the effects of infiltration heads on the soil water movements is analyzed. The experiment was divided into three different infiltration heads （ 3, 4, 5 cm） under film mulched ridge-furrow irrigation with small tubes and film mulched ridge-furrow drip irrigation with head for 4cm （CK）. The results show that during the period of irrigation, the cumulative infiltration volume and wetting front transport distance increases with the extension of time ; At the same infiltration time, with the increase of infiltration head, the cumulative infiltration volume increases, the level of wetting front transport distance increases gradually, while vertical of wetting front transport distance gradually decreased. With the increase of the distance from the center of the furrow, the soil moisture content decreases. But the distribution of soil moisture uniformity increases as infiltration head increases. The results of this study can provide a basis for the use of film mulched ridge-furrow irrigation with small tubes.

关 键 词：入渗水头 小管出流 垄沟灌 水分运移 

分 类 号：S275.9[农业科学—农业水土工程]