宁夏中部干旱区枸杞痕量灌溉技术应用评价

The Application Evaluation of Scar Irrigation Technology in Arid Area of Central Ningxia

选取宁夏灌区中部干旱带枸杞种植基地,建设痕量灌溉试验示范区,对灌水均匀度、供水压力与灌水器出水量、土壤纵横剖面湿润范围以及痕量灌溉技术应用的经济效益进行监测与评价,结果表明:痕量灌溉具有较高的灌水均匀度,且能够有效节约水资源;供水压力与灌水器出水量成多项式关系,随着供水压力增大,灌水器出水量增加,当供水压力达到20 m水头时,灌水器出水量骤减,且灌水器损坏无法恢复;痕量灌溉运行较滴灌投资较大,运行成本高。

Selecting the arid belt planting base in the central part of Ningxia Irrigation District, monitoring and evaluation of irrigation uniformity, water supply pressure and emitter water output, soil vertical and horizontal profile wetting range and economic benefits of trace irrigation technology, the results show that irrigation has high irrigation uniformity and can save water resources effectively, the water supply pressure has a polynomial relationship with the water output of the emitter, as the water supply pressure increases, the water output of the emitter increases.When the water supply pressure reaches 20 m water head, the water output of the emitter is suddenly reduced, and the emitter damage cannot be recovered;trace irrigation operation is more expensive than drip irrigation and has high operating costs.