中文摘要：

通过室内试验研究了滴头间距对线源滴灌土壤湿润均匀度的影响。试验中滴头间距设为10、30、40、50和70cm5个处理,滴头流量和滴水量恒定,分别观测分析了滴头连线方向的土壤湿润均匀度、垂直该连线方向的湿润均匀度、交汇区的湿润均匀度以及地表湿润带的均匀度。结果表明：在试验范围内壤土沿滴头连线方向、垂直滴头连线方向以及交汇区的湿润均匀度均不受滴头间距的影响;滴头间距大于30cm时,沙土沿滴头连线方向的湿润均匀度减小,而垂直滴头连线方向和交汇区的湿润均匀度基本不随滴头间距而变化,但其交汇区土壤含水量却随滴头间距增大而明显降低;滴头连线方向的土壤湿润均匀度是评价线源滴灌质量的最主要指标。以上结果可以为滴头间距和滴灌带间距设计提供参考。

英文摘要：

Based on experiments,the influence of drippers spacing on soil moisture uniformity from linear source drip irrigation were studied under the same dipper discharge and dripping water.The experiments involved different combinations of two soil types （sandy and loam soils）,drippers spacing being in the range of 10～70cm,and with the dripper discharge and dripping water being constant.The results showed that the influence of drippers spacing on soil moisture uniformity mainly depended on soil types.The moisture uniformities of loam soil along and across drip line and on intersection side of wetted fronts were not influenced by drippers spacing.The moisture uniformity of sand soil along drip line did not obviously decrease until drippers spacing exceeded 30cm,and its moisture uniformity across drip line and on the intersection side of wetted fronts were not dominantly influenced by drippers spacing,but the soil water volume of wetted fronts intersection area was in reduced obviously with drippers spacing increased.The moisture uniformity along drip line is the most important quota for quality appraising of linear source drip irrigation.The results of this study are useful to the design of drip irrigation system.