The impacts of increased human activities in the last two hundred years have seriously damaged the semi-arid and semi-humid ecosystems of western Liaoning in China. Frequent droughts and heavy soil erosion are the major obstructions of agricultural development in the area. The energy flows through an agroecosystem in rural area of Kazhou county, a typical one in western Liaoning province, have been studied to learn some basic characteristics of the agroecosystem and to find some strategies for improving it....