根据生物气候相互补偿原理，采用二次规划模型，以一地作物播种面积和期望产量为约束条件，总产量方差最小为目标函数．在中（大）型电子计算机上模拟出最优解，该最优解给出一地几种作物或一作物在大区域内各地的种植最优比例．以此，达到抗灾减灾和稳产、高产的目的．

According to the principle of complementary relationships existing between living things and climate, using the method of quadratic programing pattern, we use sowing area of plant and optimum yield as the bound condition, the minimum varance of the total yield as the objective founction stimylate the optimum result at mico-computer and main-frame computer. This optimum result shows the optimal growing ratio of several crops in one area or one kind of crop at various areas in a large scale region,with this, we reach the goal of disaster-resistance, disaster-reduction, stable yield, highyield, and high-effect.