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Eco-efficiency of grassland-based animal husbandry and its determinants in the source regions of the Yangtze and Yellow Rivers |
ZHU Fu-biao1,2, FANG Yi-ping1,2, YI Shu-hua3, YU Hu4 |
1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
4. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
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Abstract Taking the source regions of the Yangtze and Yellow Rivers as case and using both super-efficiency DEA and Malmquist DEA models, spatiotemporal changes in the eco-efficiency of grassland-based animal husbandry and its determinants were analysed. The results showed that there was a significant spatial difference in the eco-efficiency. In 2013, Yushu City, Chengduo County and Nangqian County experienced relatively high the super-efficiency, while Dari County, Maduo County and Tanggulashan Town were relatively low the super-efficiency. Based on the changes in space and time, the eco-efficiency was divided into three sequential stages:a steadily rising stage during the period 1994~2002, a differentiating stage during the period 2003~2006, and a rapidly rising stage during the period 2007~2013. It was further demonstrated that the eco-efficiency depended heavily on the technological progress and scale efficiency. And capital, precipitation and labor force were the determinants of the eco-efficiency. Therefore, increasing investment in science and technology; improving the technological and management level and labor quality; constructing water conservancy facilities, pastureland and livestock shelter; strengthening the protection of grassland ecosystem and frozen soil, will be most effective in the long term when they are complemented by appropriate public policies.
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Received: 28 March 2016
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