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| Driving forces analysis of agro-ecological security change of Zhifanggou Catchment in Hilly-gully Region of the Loess Plateau |
| 李芬1,2；王继军1 |
| 1.Institute of Soil and Water Conservation,Northwest A & F University,712100,Yangling,Shaanxi;2.Research Center of Eco-Environmental ciences,Chinese Academy of Sciences,100085,Beijing: China |
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Abstract Based on investigation and monitoring data from 1985 to 2006 at Zhifanggou Catchment in Hilly-gully Region of the Loess Plateau and current research achievement,methods of principal components analysis(PCA) and path analysis(PA) were combined to analyze impact factors which affect change of agro-ecological security state,and driving forces of agro-ecological security change were discussed.The obtained results show that the basis of agro-ecological security change are natural conditions and its main driving forces are socio-economic situations that can be classified into four types,which are economic development,the pressure of population,industrial restructuring of catchment,agricultural scientific and technological progress.Besides,the related policies of nation and region,correlation degree of agricultural industrial chain and resources have influence on it to some extent.
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Received: 02 September 2008
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