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农作物种植过程中农药的使用非常重要,本文以农药锐劲特在水稻种植中的使用为例,对农药的使用方案进行研究。文章首先仿照食物链模型建立反映生长作物、病虫害与杀虫剂之间作用的微分方程模型,并模拟仿真三者随时间的变化。然后根据农药使用的周期性对每个周期初始量进行分析,得到具有迭代思想的约束条件,并以利润最大为目标函数建立了带有微分方程约束条件的非线性优化模型。最后用穷举法对模型进行求解得到锐劲特的最佳使用方案。
The use of pesticides in the process of crop cultivation is very important. In this paper, the use of pesticide, fipronil, in rice cultivation is taken as an example to study the application of pesticides. First, the article modeled the food chain model to establish the differential equation model reflecting the role of the growing crops, pests and insecticides and simulating the three changes over time. Then the initial quantity of each cycle is analyzed according to the periodicity of pesticide use, and the constraints with iteration are obtained. The nonlinear optimization model with the constraints of differential equations is established with the maximum profit as the objective function. Finally, exhaustive method to solve the model to get the best use of Regent programs.