根据种植业和畜禽养殖业协调发展的原则，以河南省封丘县潘店乡现行农业生态系统物质流、能量流和价值流为基础，以种植业和畜禽养殖业总体经济纯效益最高为目标，在土地面积、劳力、畜力、社会需求、饲料量的约束之下，进行了种养结合的优化设计，得出了优化方案。优化后的农业生产结构比优化前的纯收益提高了６９１４％，系统的综合效益指数提高了３３４８％，优化方案对调查地区农业生态系统结构调整具有一定指导意义。

According to the principle of harmonious development of integrated farming system, based on material and energy flow and economic value flow in the existing agriculture system in consideration of restrained factors of land area, manpower, livestock power, social demand and fodder amount in the investigation area, an optimization structure was suggested. In the light of the optimization model, the total net profit of farming and animal husbandry can be 69 14% more than that of conventional one, and the system's comprehensive profit index can be increased by 33.48%, which indicated that this optimization design can provide significant benefits for adjusting the structure of agriculture system in the investigation area.