Experimental Study on Factors Influencing Soil Moisture Uniformity under Linear Source Drip Irrigation

摘要：

Field experiments were conducted to investigate the factors which are influencing soil moisture uniformity under linear source drip irrigation.The experiments involved different combinations of two soil types (sandy and loam soils),drippers spacing ranging from 30cm to 50era,dripper discharge varying from 0.3L/h to 5L/h,and dripping water volume being in the range of 10L～25L.The experimental results show that there is an essential difference between the uniformity of dripper discharge along the drip line and the uniformity of soil moisture in field (USM) in terms of the design of linear source drip irrigation (LSDI).The dominant factors of soil moisture uniformity include drippers spacing,dripper discharge,dripping water volume,and soil types.These factors should be taken into account in the design of LSDI in addition to the essential prerequisite factor that ensures the uniformity of dripper discharge along drip line.The uniformity of soil moisture along drip line (USMDL) depends on the overlapping of soil wetting patterns,which is further controlled by the width of soft wetting pattern and the drippers spacing.The USMDL for sand soil increases significantly with dripping water volume.In loam soil the USMDL increases with dripper discharge.The USM for both types of soils decreases with increasing drippers spacing along the drip line.If the soil contains high clay content,a certain infiltration depth and small drippers spacing are required in the design of LSDI to ensure the USM.The results of this study are useful to the design of drip irrigation system.

关键词： linear source drip irrigation uniformity of soil moisture dripper discharge drippers spacing

作者: Li Mingsi Xie Yun Zheng Xurong

作者单位: College of Water Conservancy and Architecture Engineering,Shihezi University,Xinjiang,Shihezi,83200 Water Conservancy Bureau of Xinjiang Production and Construction Group,Xinjiang Uorornuqi,830002,Ch College of Water Conservancy and Architecture Engineering,Shihezi University,Xinjiang,Shihezi,832003

会议类型: 国际会议

会议名称: International Conference on Effective Utilization of Agricultural Soil & Water Resources and Protection of Environment and the 4th Annual Academic Conference of Chinese Society of Agricultural Soil and Water Engineering

会议地点: 南京

会议语种:英文

页码: 243-249

在线出版日期: 2006-08-16（万方平台首次上网日期，不代表论文的发表时间）