分析了作物产量与全生育期总腾发量之间线性与非线性关系产生的原因及其适用条件 ,给出了基于常规试验数据求解非线性关系的方法 ,为节水灌溉条件下的最优水管理提供了依据 ,并进行了实例分析计算 This paper analyzes the causes of the linear and non-linear relationship between the crop yield and the total growth period and its application conditions, and gives the method of solving the nonlinear relationship based on the conventional test data, which is the best under water-saving irrigation Provide the basis for water management and carry out an example analysis and calculation