西南岩溶地区耕地利用效率及其影响因素

以我国西南岩溶地区为研究区域，从投入和产出2个维度选取耕地利用效率指标，采用数据包络分析（DEA）法对该区112个市2011—2017年耕地利用效率进行分析，以地理探测器模型分析研究影响耕地利用效率的关键因素。结果表明:从时间变化来看，2011—2017年，西南岩溶地区耕地利用综合效率、技术效率和规模效率总体上都呈现“先上升后下降”态势。从空间变化来看，综合效率和技术效率具有中等强度的空间分异性，规模效率具有较弱的空间分异性；耕地利用效率高值区在整个研究区内基本呈连续分布，而低值区呈“插花状”分布。地理探测器分析表明，岩溶比例（q=0.24）、高程（q=0.21）是西南岩溶区耕地利用效率的主要影响因子，影响因素间的交互作用增强了对西南岩溶区耕地利用效率的影响。 

Cultivated Land Use Efficiency and Influencing Factors in Karst Area of Southwest China

Taking karst area of southwest region in China as research area，selecting cultivated land use efficiency indicators from two dimensions of input and output，data envelopment analysis（DEA）method was used to analyze cultivated land use efficiency of 112 cities in the district from 2011 to 2017，and key factors affecting cultivated land use efficiency were analyzed by using geographic detector model.Results showed that，first，from perspective of time changes，comprehensive efficiency，technical efficiency and scale efficiency of cultivated land use in karst areas of southwest China showed a trend of“first rising and then declining”from 2011 to 2017.Second，from perspective of spatial changes，comprehensive efficiency and technical efficiency had moderate spatial differentiation，scale efficiency had weak spatial differentiation.High value area of cultivated land use efficiency in the whole study area was basically continuous distribution，while low value area was“flower arrangement”distribution.Third，geographic detector analysis showed that karst proportion（q=0.24）and elevation（q=0.21）were the main influencing factors of cultivated land use efficiency in southwest karst area，and the interaction of influencing factors enhanced influence on cultivated land use efficiency in southwest karst area.