| Ecology and Economics |
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| Assessment of Agricultural Complex System Based on Emergy and A Case Study |
| SU Rui1,2, CHEN Ya-ning1, LI Wei-hong1, ZHOU Hong-hua1, MA Yan-fei1, WANG Guo-gang1,2 |
1.Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences, Urumqi 830011, China；
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Based on emergy theory and relating data in 1996—2007, we constructed agricultural complex system assessment indices from three parts: agricultural input(output, agricultural environment(social economy system and agricultural development capability, then made a case study of agricultural complex system and its sensibility of the Tikanlik Oasis in low reaches of the Tarim River. Results indicate that: (1) In the whole, the total emergy input and yield all increased but the yield increase rate was quicker than input increase rate during the study period. (2) With agriculture development, its dependence on environmental resources was less than on nonrenewable fuels; pressure on agricultural environmental intensified and agricultural complex system had low sustainability. (3) Mechanization, modernization level and agriculture production efficiency in the oasis improved, and the peoples living standard and economy development also presented a new improvement, however agricultural development level was low and it was still a consumption system. Sensitivity analysis showed that nonrenewable fuels had more influence on agricultural complex system than renewable environmental resources.
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Received: 29 April 2010
Published: 20 January 2012
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2012, Vol. 32 
