【作者】 李明思； 孙海燕； 谢云； 郑旭荣；

【Author】 LI Ming - si, SUN Hai - yan, XIE Yun, ZHENG Xu - rong (College of Water Conservancy and Architecture Engineering, Shihezi University, Shihezi Xinjiang 832003, China )

【机构】 石河子大学水利建筑工程学院；

【摘要】 滴头流量的变化对湿润体的大小和形状影响很大,进而影响作物根系生长和产量。但工程设计中滴头流量的选择缺少科学依据,使得设计湿润深度和湿润比不能同时保证。本研究通过对重壤土、中壤土、砂壤土进行不同流量的滴水试验发现:滴头流量对湿润锋水平运移的影响比对垂直运移的影响大;滴灌设计中,设计湿润比或湿润宽度是选择滴头流量的主要依据。更多还原

【Abstract】 The soil wetting pattern,which has influence on crop root development and crop yield under drip irrigation,is mainly affecfed by the drip discharge. However, the drip discharge is not reasonably determined in the design of drip irrigation system, so that the designed wetting depth and wetting proportion couldnt be simultaneously ensured in practices. For clay , loam clay, and sandy soil, drip watering tests were implemented with different drip densities. It was found that drip discharges affected the horizontal advance of wetting front more than the vertical one, and in the design of drip irrigation system, drip discharge should be determined on the soil wetting proportion (or land surface wetting diameter).更多还原