西北旱区农地经营规模与灌溉用水效率关系新探讨OACHSSCD

Based on the panel data of 114 counties in the northwest arid region spanning from 2008 to 2022,utilizing the sub-vector DEA,panel Tobit and threshold models,this study conducted an empirical analysis of the mechanism and threshold effect of the relationship between farmland production scale and irrigation water use efficiency.Moreover,it explored the interaction between farmland production scale and multiple indicators for the measurement of agricultural efficiency.The results show that the irrigation water use efficiency in the northwestern arid region exhibits a"southward and westward"spatiotemporal evolution trend.Meanwhile,a significant"inverted U-shaped"relationship is observed between farmland production scale and irrigation water use efficiency,with threshold tests showing apparent regional heterogeneity.Furthermore,farmland production scale has an"inverted U-shaped"relationship with total factor productivity and land productivity,and a"U-shaped"relationship with labor productivity.The threshold characteristics of each indicator also differ significantly.Finally,from a multi-objective collaborative perspective,the appropriate farmland production scale interval in the northwestern arid region is observed to be between 0.754 and 1.386 hectares.It is accordingly recommended that a region-specific,scale-precise management system be established,that technical solutions be developed based on the matching of management scale,and that pathways to achieve appropriate scale through multi-objective collaboration be promoted,so as to improve the collaborative governance system for farmland.