基于基尼系数的湖南省耕地质量差异程度分析

The Different Degree of Arable Land Quality in Hunan Province Based on Gini Coefficient Analysis

应用基尼系数计算方法,以湖南省14个市级行政单位耕地地力为例,得出各区域耕地质量差异程度由小到大排列依次如下:湘潭市<长沙市<岳阳市<株洲市<衡阳市<娄底市<邵阳市<永州市<益阳市<郴州市<常德市<湘西自治州<怀化市<张家界市。耕地质量差异程度两两相差最小的是衡阳市和娄底市、邵阳市和永州市。利用聚类分析软件和GIS应用软件,将耕地质量差异程度分为四级:一级包括湘潭市、长沙市、岳阳市、株洲市;二级包括衡阳市、娄底市、邵阳市、永州市;三级包括益阳市、常德市、郴州市;四级包括湘西自治州、怀化市、张家界市。机耕面积比例与耕地基尼系数呈负相关,且比有效灌溉面积比例对耕地基尼系数的影响要大。有效灌溉面积比例与耕地基尼系数在干旱区呈负相关,在洪灾区呈正相关。图2,表5,参14。

s Applys Gini coefficient method to the example of arable land quality in 14 city-level administrative units of Hunan province, and reaches from small to large the regional diffenrnct degree of arable land quality be ranked as follows： Xiangtan 〈 Changsha 〈 Yueyang 〈 Zhuzhou 〈 Hengyang 〈 Loudi 〈 Shaoyang 〈 Yongzhou 〈 Yiyang 〈 Chenzhou 〈 Changde 〈 Xiangxi Autonomous Prefecture 〈 Huaihua 〈 Zhangjiajie. It is the smallest difference of Hengyang and Loudi each other, of Shaoyang and Yongzhou each other, in the differenet degree of amble land quality. Using cluster analysis software and GIS applications, the differenct degree of amble land quality will be divided into four different classification： the first grade including Xiangtan, Changsha, Yueyang, Zhuzhou ; the second grade including Hengyang, Loudi, Shaoyang, Yongzhou ; the third grade including Yiyang, Changde, Chenzhou ; the fourth grade including Xiangxi Autonomous Prefecture, Huaihua, Zhangjiajie. And the proportion of machinery-cultivated land area is negatively correlated with Gini coefficient, and it is more effective on the Gini coefficient of amble land quality than the proportion of effective irrigated area. The proportion of effective irrigation area is negatively correlated with Gini coefficient in the arid zone, and is positively correlated with Gini coefficient in the flood zone.