基于控制灌溉理论的水稻优化灌溉制度研究

结合田间试验研究成果及Jensen模型，建立了基于水稻控制灌溉理论的宁夏引黄灌区轻度盐碱地水稻优化灌溉制度。水稻全生育期灌溉水量为600 mm，灌水15次，主要分布在返青期、拔节孕穗期和抽穗开花期。该优化灌溉制度较常规漫灌节水69.2%。该灌溉制度的建立，对于提高宁夏引黄灌区水稻节水灌溉技术具有重要的实践参考价值。

Optimized rice irrigation schedule based on controlling irrigation theory

According to field scale experiment and Jenson model, different rice irrigation schedules were studied to obtain the optimum with the goal of the highest yield, as well as ideal water use efficiency. The schedule that accords with controlling irrigation theory was selected. Under this optimized irrigation schedule, total irrigation water of average-rainfall year was 600 mm, irrigating 15 times during all the stages of rice life, such as returning green, elongating to booting, and heading time stage. The optimized rice irrigation schedule saved 69.2 percent of irrigation water compared with flood irrigation schedule. The relative field scale experiments demonstrate that this irrigation schedule adapts to be used in light saline-alkali soils of Ningxia Yellow River irrigation areas, which showed that the schedule would play an important role in water-saving rice irrigation and utilization of fresh water of these areas.