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在分析水稻生育阶段水分生产函数中敏感指数变化规律的基础上，导出了敏感指数累积函数模型及分旬敏感指数值．以此为基础，将降雨视为随机变量，结合高效节水灌溉条件下稻田水量平衡的特点，充分考虑水稻实际腾发、稻田渗漏和稻田水分实际消退过程，建立了随机降雨情况下，求解稻田高效节水优化灌溉制度的随机动态规划模型．实例研究表明，模型及求解方法合理可行
Based on the analysis of the change law of the sensitive index in the water production function of rice during the growth stage, the cumulative index of sensitive index and the sensitive index value were derived. Based on this, taking rainfall as a random variable, taking into account the characteristics of paddy field water balance under high efficiency water-saving irrigation conditions, taking full account of actual evapotranspiration, paddy field leakage and water paddy field actual subsidence process, the establishment of a random rainfall case solution Stochastic Dynamic Programming Model for Optimizing Irrigation Schedule in Paddy Field with High Efficiency and Saving Water. The case study shows that the model and the solution method are reasonable and feasible