A STUDY OF THE ENERGY ANALYSIS AND NUTRIENT BALANCE OF THE COURTYARD ECOSYSTEM IN NORTHERN CHINA
北方庭院生态系统能量分析及养分平衡研究

This paper takes northern China's courtyard ecosystem based on the production of edible mushroom as the research abject. The energy analysis and nutrient balance of a typical peasant household courtyard in the suburb of Shenyang have been studied. The results show that the total exported energy of the products of this courtyard ecosystem is 41 872.14MJ/a. Of them the exported energy of the products of oyste mushroom occupies 65 4%,and the N,P2O5 and K2O of the import export system basically maintain the nutrient balance. It is regarded that this courtyard ecosystem is a highly productive and considerably beneficial system and thus has important realistic significance in directing the construction of the rural courtyard ecosystem in this region.