【摘要】 以生猪养殖排放的主要污染物总氮、总磷和化学需氧量作为非期望产出,基于2004—2016年中国17个生猪主产省的数据,采用非径向、非角度基于松弛变量的方向性距离函数全要素生产率模型,对生猪优势产区和主产省大、中、小不同规模养殖的绿色全要素生产率增长及其技术进步率和技术效率变化分解指数进行测度和比较,结果表明:规模化生猪养殖绿色全要素生产率有一定幅度的增长,三种规模均呈现出差异化增长的空间特征和波动性增长的时序变化特征;小规模生产率增长主要源自技术进步,大规模则主要源自技术效率提升,中规模由技术进步与技术效率改善双力驱动;资源禀赋条件和经济发展水平决定的不同规模养殖比较优势、地方政府对本地生猪规模养殖的重视程度等差异是导致区域和省份间差异的重要原因。更多还原

【Abstract】 This paper takes the main discharging pollutant TN,TP and COD in hog breeding as undesired output, utilizes the total factor productivity model which was expressed by non-radial and non-angular directional distance functions based on slack variable to measure and compare the green productivity increase and its efficiency improvement rate and technical efficiency variation index in17 major hog breeding provinces and large, middle, small scale farms from 2004 to 2016.The result indicates that: The green total factor productivity of hog breeding has increased to some extent, all the three scales shows the characteristic of differentiation growth in spatial change and volatility growth in time series; the productivity increase in small scale mainly comes from technical progress, the increase in large scale mainly comes from technical efficiency improvement, while the productivity of medium scale increases with the technical progress and technical efficiency improvement. Finally, it points out the comparative advantaged which is determined by the resource endowment and economic development difference, difference of recognition degree of local government to scale hog breeding are the important reasons for the different TFP increase and its source of hog cultivation of disparate scale in different region and provinces.更多还原