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| Quantitative Analysis on Ecological Construction Policy’s Impact on Sandy Desertification |
| Fan Shengyue, Xu Yucai, Xu Jun, Lan Jian |
| School of Economics, Minzu University of China, Beijing 100081, China |
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Abstract This paper starts with the physical mechanism of sandy desertification,and policy index (PIX) is used to represent the impact that ecological construction policy has on sandy desertification. This index is divided into two variables: spatial scope (PSS) and time intensity (PEF), PIX =(PSS +PEF)/2. This paper sets Grain-to-Green Program and Prohibiting Grazing carried out in Yanchi County, Ningxia Province as an example, and selects 40 sample points in policy implementation area to extract the data of sandy desertification area' change, NDVI (Normalized Difference Vegetation Index) and policy index et al. Calculation shows that, coefficient of correlation of Grain-to-Green Program,Prohibiting Grazing and change of sandy desertification area are -0.664 and -0.746, which means both policies play a significant role in desertification area reduction. PSS and PEF are significantly associated with sandy desertification, which shows that policy index can more accurately reflect the effect of factors on sandy desertification. Quantitative analysis of policy factors' effect on desertification is of significance on evaluating the performance of desertification management policy and design of new.
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Received: 11 March 2013
Published: 20 May 2014
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2014, Vol. 34 
