Quantitative evaluation of the effect of prohibiting grazing policy on grassland desertification reversal in northern China

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• 作者：Lihua Zhou (1) (3)
  Yanling Zhu (1)
  Guojing Yang (2)
  Yiqi Luo (3)
  
• 关键词：Prohibiting grazing policy ; Grassland ; Desertification reversal ; Agro ; pastoral ecotone ; Northern China
• 刊名：Environmental Earth Sciences
• 出版年：2013
• 出版时间：April 2013
• 年：2013
• 卷：68
• 期：8
• 页码：2181-2188
• 全文大小：359KB
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• 作者单位：Lihua Zhou (1) (3)
  Yanling Zhu (1)
  Guojing Yang (2)
  Yiqi Luo (3)
  
  1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
  3. Department of Botany and Microbiology, University of Oklahoma, Norman, OK, 73019, USA
  2. Key Laboratory of Ecohydrology and Integrated River Basin Management, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
  
• ISSN：1866-6299

文摘

In northern China, the recent eco-environment protective policies played a very important role in the ecological environment protection and rehabilitation. To better understand the quantitative effect of the prohibiting grazing policy on grassland desertification reversal process, in this paper, Yanchi County was selected as a case study to conduct a quantitative research on the effect of prohibiting grazing policy. System dynamics research method was used in this study, also both natural factors and human factors which importantly related to desertification had been considered in the index system of the system dynamics method. According to the different grazing prohibition degree from 0 to 100?%, model was set up to simulate the grassland desertification degree. The results showed that grassland desertification degree decreased with the increase of the grazing prohibition degree. When the grazing prohibition degree was 30?%, grassland desertification began to reverse, and when the grazing prohibition degree was 40?%, the trend of grassland desertification reversal was steady, and the speed of desertification reversal was the same when the grazing prohibition degree changes from 40 to 100?%. Therefore, the full prohibiting grazing policy in Yanchi County currently is not necessary at all. These results could be very useful for the applying of prohibiting grazing policy in Yanchi County and other regions with the similar eco-environment protective policies.