Emergy analysis of ecosystem at reclamation area

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2008,（2）
• 页码范围: 299-302
• 页数: 4页
• 语种: 英文

摘要

The emergy theory was used to analyze the emergy structure of the ecosystem at reclamation area in order to find the problem existed in the reclamation ecosystem through compared with the modern agriculture. The research results show that the proportion of assistant emergy input into the system is higher which indicate that the productivity of reclamation land has not resumed and a lot of assistant emergy needed to improve the productivity. The ecosystem overly depend on chemical fertilizer, which is bad to agricultural ecosystem; the agricultural ecosystem in reclamation area belongs to traditional agriculture because the main power come from manpower and the usage of organic fertilizer is little, through compare the index of emergy with modem agriculture, the value of EYR and ED in reclamation area is less than the modern agriculture.