基于随机森林下的云南省耕地利用效率测算及基尼系数分析

Calculation of cultivated land utilization efficiency and analysis of Gini coefficient in Yunnan Province based on random forest

以2011—2020年云南省16个地州市为研究对象,对地均农业机械动力、地均劳动力等10个指标进行数据收集,在R语言中的随机森林算法下得到指标权重进而得出16个地州市的耕地利用效率;并根据基尼系数平均差公式计算得到6组不同区域之间的耕地利用效率基尼系数。结果表明,迪庆藏族自治州、德宏傣族景颇族自治州、怒江傈僳族自治州、大理白族自治州在2011—2020年平均耕地利用效率较高,普洱市、临沧市平均耕地利用效率相对偏低;滇中和滇西相比其他5组不同区域的耕地利用效率基尼系数整体在减小,而滇中和滇南以及滇南和滇北的平均基尼系数是6组不同区域平均基尼系数中最小的2组。

Taking 16 autonomous prefectures and cities of Yunnan Province from 2011 to 2020 as the research object,data of 10 indicators such as agricultural machinery power and labor force per land was collected,and the weights of these indicators were obtained by using the random forest algorithm in R language.On the basis of this,the cultivated land use efficiency of the 16 prefectures and cities was obtained.The Gini coefficients of cultivated land use efficiency among six groups of different regions were calculated according to the Gini coefficient mean difference formula.The results showed the average cultivated land utilization efficiency of Diqing Tibetan Autonomous Prefecture,Dehong Dai and Jingpo Autonomous Prefecture,Nujiang Lisu Autonomous Prefecture,and Dali Bai Autonomous Prefecture was high from 2011 to 2020,while the average cultivated land utilization efficiency of Pu’er City and Lincang City was relatively low;compared with other five groups of different regions,the Gini coefficient of cultivated land utilization efficiency of central and western Yunnan decreased as a whole,while the average Gini coefficients of central and southern Yunan,and southern and northern Yunnan were the smallest in the 6 groups of different regions.