粮食产量与耕地面积间的动力学方法分析

The Dynamic Relation of the Grain Output and Cultivated Area

通过建立粮食产量与耕地面积间的非线性动力学模式,分析粮食产量与耕地面积之间的关系。研究结果表明:稳定的粮食产量与稳定的耕地面积成正比;耕地面积的增长受当地环境所能承受的最大耕地面积的制约;在耕地面积一定的情况下,粮食总产量受粮食单产、粮食作物的复种指数、粮食作物的面积在种植业中所占的比重等因素影响。

A nonlinear model about grain total output and cultivated area is set up. The result show that: steady grain total output is directly proportional to steady cultivated area; The growth of the cultivated area is restricted by the largest cultivated area that can be bear by the local environment; In the situation that the cultivated area is certain, grain total output is influenced by grain per unit area yield, multiple crop index, the proportion of cereal sown area in planting’s. The result is helpful to harmonize the relation between grain-production and ecological environment.