耕地破碎度及空间相关性研究——以长春市九台区为例

Study on the fragmentation degree and spatial correlation of cultivated land:a case of Jiutai in Changchun City

从耕地破碎化程度入手,以吉林省长春市九台区为研究对象,结合相关研究及研究区实际情况选取面积、形状、分布三方面共6个评价指标构建了耕地破碎度评价体系,运用层次分析法和熵值法相结合的组合赋权法获得了各指标权重,计算了九台区18个乡镇的耕地破碎度综合分值,在此基础上进行了空间相关性分析.结果表明:九台区耕地破碎度在平均值以上的有6个乡镇,平均值以下的有12个乡镇;研究区耕地破碎度相关性分析呈现负相关性,其中,H-H型1个;L-L型0个;L-H型5个;H-L型1个.

Starting from the degree of fragmentation of cultivated land,taking Jiutai in Jilin province as the study area,this paper combined relevant research and the actual situation of study area and selected six evaluation indexes of three aspects including area,shape,distribution to construct the cultivated land fragmentation evaluation system.Then it used combination weighting approach combined the analytic hierarchy process with entropy value method to obtain the index weight,calculated the fragmentation score of 18 villages in Jiutai and analyzed the spatial correlation.According to the analysis,there were 6 towns in Jiutai with the value of cultivated land fragmentation above average and 12 towns below the mean.The correlation analysis of cultivated land fragmentation in the study area presented negative correlation,among them,there were one H-H type,zero L-L type,five L-H types and one H-L type.