| Optimization models of agricultural ecosystem have played an important role in the smooth running of fragile agricultural ecosystem.Based on an analysis of the environmental background and systematic limitation of Mu Us sandland in the northern part of China,a new point of view was proposed for the model optimization of agricultural ecosystem on sandland.Namely,the industrial structure has to be modified so as to make a functional integration of different parts of the whole system.According to the theories of ecological recovery,ecological engineering,the high efficient utilization of resources and complementary industry,and to design the ecology structure of defense,the planting structure of saving water,the pasturage structure of stabilization and industrial structure of benefit when to pay attention to functional availability of agricultural ecosystem,which is feasible on condition that reasonably dealing with the relationships of agriculture and stockbreeding,forestry,energy-industry,and so on.It is important that ecosystem models can be harmonized,integrated and coupled efficiently.We are looking forward to giving academic gist and technical support at model optimization for similar agricultural ecosystem in the adversity. |