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    基于不同职能城市耕地多功能演变及驱动力分析

    Multi-function evolutions of arable land and its driving forces based on different functional types of cities

    • 摘要: 从生产、社会、文化、生态4方面构建耕地多功能评价指标体系, 对长沙、株洲、张家界3种不同职能城市的耕地多功能进行评价, 并采用灰色关联分析法探索耕地功能演变驱动力因子。结果表明: 2007—2016年, 长沙耕地的生产功能得分从0.271下降到0.077, 后又回升至0.274;社会功能得分从0.117降为0.032;文化功能得分从0.026上升为0.150;生态功能得分从0.085上升为0.160。2007—2016年, 株洲耕地的生产功能得分从0.249下降到0.126, 此后又回升至0.252;社会功能得分从0.106降为0.010;文化功能得分从0.037上升为0.133;生态功能得分从0.094上涨至0.175, 后又下降为0.040。2007—2016年, 张家界耕地的生产功能得分从0.301降为0.165, 后又回升至0.272;社会功能得分从0.117降为0.056;文化功能得分从0.009上升为0.106;生态功能得分从0.172下降至0.126。长沙、株洲、张家界的耕地生产功能先降后升, 社会功能下降, 文化功能上升, 生态功能变化各异。长沙耕地功能演变的主要驱动因子为人口、城镇化率、全社会固定资产投资额; 株洲耕地功能演变的主要驱动因子为有效灌溉面积、规模以上工业数、城镇化率; 张家界市耕地功能演变的主要驱动力为城镇化率、旅游业总收入、旅游接待人数。研究结论可为不同职能城市耕地保护与耕地多功能管理提供决策依据。

       

      Abstract:
      Background In order to know the multi-function changes of arable land and compare the differences of three different functional types of cities, Changsha (capital of Hunan province), Zhuzhou and Zhangjiajie are selected as research areas, representing three different functional cities as political and economic type, industrial type and tourism type, and the multi-functions of arable land in these three cities were evaluated.
      Methods We constructed evaluation index system of arable land multi-functions from four aspects of production, society, culture and ecology, collected and dealt with data, analyzed the driving factors of arable land function changes in three cities using grey correlation analysis method.
      Results 1) From 2007 to 2016, the productive function score of arable land in Changsha decreased from 0.271 to 0.077, then recovered to 0.274; the social function score decreased from 0.117 to 0.032; the cultural function score increased from 0.026 to 0.150; the ecological function score increased from 0.085 to 0.160. From 2007 to 2016, the productive function score of Zhuzhou arable land decreased from 0.249 to 0.126, and then increased to 0.252; the social function score decreased from 0.106 to 0.010; the cultural function score increased from 0.037 to 0.133; the ecological function score increased from 0.094 to 0.175, and then decreased to 0.040. From 2007 to 2016, the productive function score of arable land in Zhangjiajie decreased from 0.301 to 0.165, then recovered to 0.272; the social function score decreased from 0.117 to 0.056; the cultural function score increased from 0.009 to 0.106; the ecological function score decreased from 0.172 to 0.126. 2) The correlation degrees of population, urbanization rate, total fixed asset investment, total tourism income, effective irrigation area, GDP and the evolution of arable land function in Changsha were 0.805, 0.767, 0.652, 0.628, 0.601, and 0.584 respectively. The correlation degrees of effective irrigation area, number of industries above designated scale, urbanization rate, population and the evolution of arable land function in Zhuzhou were 0.824, 0.741, 0.659, and 0.632 respectively. The correlation degrees of urbanization rate, total tourism revenue, number of tourists, population, effective irrigation area, GDP and the evolution of cultivated land function in Zhangjiajie were 0.774, 0.758, 0.735, 0.716, 0.707, 0.696 respectively.
      Conclusions 1) The production function of arable land in Changsha, Zhuzhou and Zhangjiajie declined first and then increased, the social function declined, the cultural function increased, and the ecological function changed differently from 2007 to 2016. 2)The driving forces of Changsha which affect the change of cultivated land function are population, urbanization rate and investment in fixed assets. 3) The driving forces of cultivated land function change in Zhuzhou are effective irrigated area, the number of industries above the scale, and urbanization rate, and those in Zhangjiajie are urbanization rate, tourism revenue, and the number of tourists. The arable land multi-function changes and its driving factors in three cities with different functions are different. The study result could provide practical basis for the cultivated land protection and the multi-functional management in different functional cities.

       

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