| Energy based analysis of developmental situation and countermeasures for sustainable development of agricultural eco-economic systems of Gansu |
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| DOI：10.7606/j.issn.1000-7601.2007.05.33 |
| Key Words: energy agricultural eco-economic system sustainable development Gansu Province |
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| Abstract: |
| Based on the theory of energy analysis,this article investigates quantitatively the energy flow of agricultural eco-economic systems in Gansu Province.Through the research,following results and suggestions are presented:(1) The energy self-sufficiency ratio of Gansu is 99.27%.It means that Gansu agricultural eco-economic systems rely mainly on the local resources.The Gansu agricultural eco-economic systems are not open and sustainable.On the other hand,there is a great potentiality to develop the resources of Gansu.So,attraction of more foreign energy is a very important tactic to the sustainable development of Gansu.(2) The energy density is much lower,which shows that Gansu is an agricultural area.Unrenewable resources amount for 81.11% of its total energy use,which shows that agricultural eco-economic systems development is mostly depended on the contribution of raw materials.So Gansu should speed up to develop knowledge concentrated industry for future sustainable development.(3) Net loss of top soil energy is 1.43×1022 sej.It is 18.72% of total energy use of Gansu,which shows that soil loss is a very important problem in Gansu Province.It is a key factor for the further development of agriculture,forestry and animal husbandry in Gansu Province.So the projects of returning farmland to forest(grassland),protecting natural forest,and controlling desertification are effective ways. |
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