Experiment on water migration of surge root irrigation in loess sloping fields
Wang Youke1,2 , Li Penghong1,3 , Ma Lihui1,2 , Zhao Yingna1, Li Pengjun4
(1.College of Water Resources and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China; 3.Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China; 4.China National Petroleum Offshore Engineering Co.Ltd., Tianjin 300451, China)
Abstract：In order to know the water migration of a new micro-irrigation technique of surge root irrigation,different water migrations of surge root irrigation were studied by cross sectional method under different hold diameters and depths in the wild loess sloping fields. The results show that under different hole diameters and depths, there are different influences on the horizontal diffusion radius, the upward infiltration distance and the downward infiltration depth of wetting front, and all of them have remarkable power rules with time; During 24 h after stopping surge root irrigation, the wetting front increased more than 47% relatively on horizontal and vertical diffusion, and the average moisture content of wetted volume decreased 30% relatively; After 24 h the wetting front diffused less and the moisture content decreased less. Therefore the design of surge root irrigation system can be established on the characteristic value of wetted volume on 24 h after stopping surge root irrigation, it will be proper when the hole depth is 30～40 cm and the hole diameter is of 6 cm. This research results can provide theory reference on application of the surge root irrigation technology.
汪有科, 黎朋红, 马理辉 , 赵颖娜, 黎朋军. 涌泉根灌在黄土坡地的水分运移规律试验[J]. 排灌机械工程学报, 2010, 28(5): 449-454.
Wang Youke, Li Penghong, Ma Lihui , Zhao Yingna, Li Pengjun. Experiment on water migration of surge root irrigation in loess sloping fields. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(5): 449-454.
[1]吴普特,汪有科,辛小桂,等.陕北山地红枣集雨微灌技术集成与示范[J].干旱地区农业研究,2008,26(4):1-6.Wu Pute,Wang Youke,Xin Xiaogui,et al.Integration and demonstration of the date micro-irrigation technology in the hilly of Shanbei[J].Agricultural Research in the Arid Areas,2008,26(4):1-6.(in Chinese)[2]Bosch D J,Powell N L,Scott W F.An economic comparison of subsurface microirrigation with center pivot sprinkler irrigation[J].Journal of Production Agriculture,1992,5(4):431-437.[3]Phene C J,Beale O W.High-frequency irrigation for water nutrient management in humid regions[J].Soil Science Society of America Journal,1976,40(3):430-436.[4]夏玉慧,汪有科,汪治同.地下滴灌埋设深度对紫花苜蓿生长的影响[J].草地学报,2008,16(3):298-302.Xia Yuhui,Wang Youke,Wang Zhitong.Effect of the burying depth of under ground drip irrigation system on alfalfa growth characteristics[J].Acta Agrestia Sinica,2008,16(3):298-302.(in Chinese)[5]杨素哲,沈菊艳,黄宝全,等.果树涌泉灌溉方式的技术应用[J].农业工程学报,2005,21(S1):68-71.Yang Suzhe,Shen Juyan,Huang Baoquan,et al.Technology and application of fruit tree bubbler irrigation[J].Transactions of the CSAE,2005,21(S1):68-71.(in Chinese)[6]吴普特,牛文全.节水灌溉与自动控制技术[M].北京:化学工业出版社,2002.[7]Battam M A,Sutton B G,Boughton D G.Soil pits as a simple design aid for subsurface drip irrigation systems[J].Irrigation Science,2003,22(3/4):135-141.
