负水头灌溉系统供水规律研究  

Water Supply Law of Negative Hydraulic Head Irrigation System

作　　者：李邵[1,2] 薛绪掌[2] 郭文善[1] 李霞[2] 赵宝平[2] 陈菲[2] 

机构地区：[1]扬州大学江苏省作物遗传生理重点实验室,江苏扬州225009 [2]国家农业信息化工程技术研究中心,北京100097

出　　处：《灌溉排水学报》2008年第5期55-58,共4页Journal of Irrigation and Drainage

基　　金：国家自然科学基金资助项目(50479064)

摘　　要：为了总结负水头灌溉系统的供水规律,进行了负水头灌溉与常规灌溉条件比较下栽培番茄实验,分析了负水头灌溉系统不同吸力值下的土壤含水率动态变化,同时分析了负水头灌溉与常规灌溉耗水量以及植株蒸腾的差异。结果表明:负水头灌溉系统运行稳定,能做到适时适量自动为作物提供水分,适当提高作物的蒸腾速率;负水头灌溉系统能通过调节吸力值的大小来精确持续控制土壤含水量的变化,且土壤含水量时间与空间分布波动都较小,表现出良好的灌水均匀性;负水头灌溉系统能有效地减少土壤渗漏,避免了土壤水分的过度波动,番茄耗水量要小于常规灌溉,节水效果良好。To sum-up the law of negative hydraulic head irrigation system, comparing of tomato experiment under negative hydraulic head irrigation and normal irrigation was carried out, soil water content distribution under different water supply tension was studied, the difference of plant sap flow and water consume under two irrigation methods was also analyzed. The results showed that negative hydraulic head irrigation system run stable, system can supply proper water for plant automatically, properly enhance the sap flow of tomato, and increase the yield potential of plant; soil water content can be change by adjust the water supply tension, the fluctuate of soil water content temporal distribution and spatial distribution under negative hydraulic head irrigation system are small, the irrigation represent uniformity; soil leakage can be reduced and negative hydraulic head irrigation system and repeated drying and wetting of soil profile cannot be avoided under negative hydraulic head irrigation system, water consume under negative hydraulic head irrigation system is less than normal irrigation, the effect of water saving is represented.

关 键 词：负水头灌溉 常规灌溉 供水规律 番茄 

分 类 号：S274[农业科学—农业水土工程]