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| Characteristics of Emergy Spatial Heterogeneity of Farmland Ecosystem in the Minqin Oasis |
| Huang Lingling1, Wang Ping1, Liu Shuying1, Ma Gang1, Zhang Zhigong1, Wang Kun2 |
1. College of Resources and Environment, Gansu Agricultural University, Lanzhou, 730070, China;
2. Department of Economics, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom |
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Abstract Based on a systematical analysis on the resources environment, structure of input and yield, and sustainability of the farmland ecosystem in 18 towns in the Minqin Oasis in 2011 with the emergy analysis method, we established a comprehensive emergy index system for the farmland ecosystem, evaluated and sorted the farmland ecosystem comprehensively by using principal component analysis method. The results showed that: Jiahe town and Hongshaliang town had higher sustainability of farmland ecosystem, the other towns belonged to consumer ecological economic system and had low sustainability; There was a clear regional difference of farmland ecosystem in the Minqin Oasis which presented a geographical distribution of "northeast high, southwest low, and oasis edge band high, center zone low"; The farmland ecosystem in the Minqin Oasis on the whole was not sustainable, farmland area with no and highly disharmonious development regions accounted for 73.68% of the total farmland area, the farmland area with strong, relatively strong and weakly harmonious development regions accounted for 26.32%. Therefore, the present unsustainable status that the farmland ecosystem in the Minqin Oasis encountered should be paid enough attention by the local government.
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Received: 15 January 2013
Published: 20 January 2014
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Corresponding Authors:
王平，wp1826@126.com
E-mail: wp1826@126.com
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2014, Vol. 34 
