基于DEA的灌区生产效率分析——以江苏省为例

针对当前灌区农业生产效率评价多采用单项投入与产出指标的不足,引入数据包络分析(DEA)方法,设定表征生产效率的投入产出指标体系,利用CCR模型对江苏省35个灌区相对生产效率进行了比较研究.相对效率分析表明,江苏省综合效率整体不高,灌区间差异较大,全省平均值为0.634,其中3个灌区为DEA有效;不同区域农业生产技术的利用及推广程度相当,灌区相对生产效率的不均衡主要由生产规模不合理引起.可以通过减少投入来提升非DEA有效灌区的生产效率,所有非DEA有效灌区改进生产效率能节约的有效灌溉面积、水资源及农业人口分别占投入量的20.7%,13.3%,9.4%.相对DEA效率的比较可为灌区生产效率的改进途径、农业节水潜力的计算等提供新的思路.

Analysis of production efficiency of irrigation districts based on DEA method:Take Jiangsu province as an example

Most agricultural production efficiency evaluations of irrigation district are based on single input and output index now. We used data envelopment analysis(DEA)method and set the input and output index system which can represent the characterization of production efficiency, after that we compared the relative production efficiency of 35 irrigation districts in Jiangsu using the CCR model as an example. Results showed that the comprehensive efficiency of Jiangsu province was not high; The differences between irrigation area were large; The average value of the comprehensive efficiency of Jiangsu was 0.634; Three irrigation districts were DEA effective; The popularization and utilization of agricultural production technology in different region were at the same rate; The imbalance of relative production efficiency of irrigation districts was mainly caused by the unreasonable production scale; We can increase the production efficiency of DEA ineffective irrigation area by reducing the input;The effective irrigation area, water resources and agricultural population we can saved in all the DEA ineffective irrigation districts were accounts for 20.7%,13.3% and 9.4% respectively by improving production efficiency when compared with the input. The comparison of the relative DEA efficiency can provide a new method for irrigation production efficiency improvement and the calculation of agricultural water saving potential.