| 留民营生态农业系统的结构与能量流和生态效率的计算 |
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| 英文关键词 |
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| 中文摘要 |
| 留民营生态农业系统是一个包括农、林、牧、副、渔各业生产的社会经济-自然复合生态系统.在该系统中,既要发展生产,全面提高农民的生活质量,并为城市提供丰富的农副产品,又要保护生态环境,避免生产发展带来的污染与生态环境的破坏,达到经济效益、环境效益与社会效益的统一. |
| 英文摘要 |
| The paper gives a general description of energy flow in an ecological agro-system at Liuminyin village, Daxin County of Beijing. By on-the-spot tests, quantitative analysis and calculation of input-output ratio of energy as well as ecological efficiency of some main subsystems have been studied. The results show that the input-output rate of artificial supplementary energy is 1, the energy conversion efficiency of primary production reaches 1.54% and utilization rate of solar energy is 0.65%. All stay at higher rates. However, the ratio of second production is a little lower. The paper also gives a brief analysis of calculation results and a relevant conclusion. |
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