Dynamic evolution analysis of grain total factor productivity in major producing areas under water-soil-energy-carbon correlation
Improving grain total factor productivity is the fundamental driving force for ensuring national food security.Considering the"water-soil-energy-carbon"correlation,this paper uses the three-stage super-efficiency EBM-GML model under the global common frontier to measure the grain total factor productivity(TFP)in China's major grain producing areas from 2000 to 2021,and an-alyzes its dynamic evolution,influence of external environmental factors and convergence test.The results showed that the annual growth rate of total factor productivity in the main grain-producing areas was 1.007,and the grain production technology level was improved as a whole.The growth level of grain total factor productivity in Northeast China was significantly higher than that in Huang-Huai-Hai region and the middle and upper reaches of Yangtze River region.After eliminating the external environmental factors and random error factors,it was found that the external factors greatly affected the improvement of grain total factor productivity,and the overall potential was not released,while the northeast region,the Huang-Huai-Hai region and the middle and upper reaches of the Yangtze River had a potential of 43.14％,24.01％and 39.96％,respectively.The overall total factor productivity index of the main grain producing areas has convergence,and the convergence of the three regions is different,among which the convergence of the northeast region is the lar-gest.While adjusting the improvement direction and potential of grain total factor productivity in different regions,reducing the differ-ences of external environment in different regions is an effective way to further improve grain total factor productivity.
total factor productivitymajor grain producing areasexternal environmental factorsspatial convergence
万方数据
维普
