Research on the water use efficiency and optimal irrigation schedule of the winter wheat

A field non-full irrigation experiment was carried out to investigate the effects of different water supplies on the winter wheat yield and water consumption characteristics at different growth stages in winter wheat growing season under field production condition. Based on the experimental data of winter wheat in the fields, the water production function of winter wheat is fitted with least square method. Both the water use effect and the rule of water consumption are disclosed through the analysis of water consumption data. According to the principle of dynamic planning, the dynamic model for optimal irrigation schedule is developed. The best irrigation pattern of two different hydrological years (50% and 75%) is presented, which provides references for field practice in North China Plain.