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本文应用了非线性目标规划模型 ,用线性化逼近法求解 ,对冬小麦 夏玉米种植制度下 ,不同降雨年型的水氮管理措施进行了优化。以灌水和施氮总量为决策变量。以产量和土壤水和氮资源利用效率为优化目标 ,其中以经济产量为第一优先层 ,以土壤水、氮资源利用效率为第二优先层。根据作物 土壤联合模型模拟所得的目标函数 ,得到了不同降雨年型下小麦和夏玉米单季和中等降雨年型小麦 夏玉米周年的优化水氮管理措施方案。
In this paper, the nonlinear target programming model is applied and solved by the linearized approximation method. The water and nitrogen management measures under different types of rainfall are optimized under the summer wheat planting system of winter wheat. Taking the total amount of irrigation and nitrogen application as decision variables. The yield and the utilization efficiency of soil water and nitrogen resources are optimized. Among them, economic output is the first priority and the efficiency of soil water and nitrogen resource utilization is the second priority. According to the objective function simulated by the joint model of crop soils, the optimal water and nitrogen management measures of wheat and summer maize under one and four seasons of different rainfall years were obtained.