我国主要农作物绿色全要素生产率分析

在农业环境资源禀赋刚性约束下应更注重农业的绿色发展.假设农业污染排放系数是一个动态变化的参数,基于动态测算农业面源污染非期望产出,运用SBM超效率模型和DEA-Malmquist生产率指数测算主要农作物的绿色全要素生产率.研究发现:①粳稻和大豆的环境技术效率大于1,而玉米、小麦和棉花的环境技术效率小于1;②棉花、粳稻和...

Analysis of Green Total Factor Productivity of Main Crops in China

More attention should be paid to the green development of agriculture under the constraints of agricultural environmental resource endowments. Assuming the agricultural pollution emission coefficient was a dynamically changing parameter， based on the dynamic measurement of the unexpected output of agricultural non-point source pollution， the SBM super-efficiency model and DEA-Malmquist productivity index were employed to measure the green total factor productivity （GTFP） of major agricultural crops. The results showed as follows：①the environmental technical efficiency of Japonica rice and soybean was greater than 1， while the environmental technical efficiencies of corn， wheat and cotton were less than 1； ② the green total factor productivities of cotton， Japonica rice and corn annual increased by 0.7%， 0.4%， and 0.3%， respectively， while the green total factor productivities of wheat and soybean annual decreased by 1.6% and 1.2%， respectively； ③ green total factor productivity was significantly different from traditional total factor productivity， and its green technology progress was even more significant； ④ improving the educational level of agricultural employees， increasing investment in agricultural science and technology， and strengthening environmental pollution control were endogenously driven to promote green total factor productivity growth. Calculating and analyzing green productivity of crop could reflect the comprehensive production capacity of each crops and the actual productivity status of the main crops.