Energy and Material Flows in the Household Ecosystem in Panjin Region

The structure,level and efficiency of energy input as well as farmland nutrient balance and material transfer for a household in Yushu Farm in Dawa County of Liaoning province were analysed in this study.Results showed that energy and materials input were mainly organic.There were surplus of nitrogen,phosphorus and potassium in the farmland soil pool.Energy conversion rate was higher because of the feedback of materials in the system.