Measurement, Distribution Characteristics and Regional Differences Analysis of Eco-efficiency Development in Tobacco Planting Zone

The positive development of ecological efficiency is of great significance for the high quality synchronization development of economy and ecological environment. In order to study the temporal and spatial distribution dynamics and regional differences of the ecological efficiency of tobacco planting zone in China, the Super-SBM model was used to calculate the ecological efficiency of provincial tobacco planting zone in China from 2005 to 2019 from economic perspective, and the kernel density function, Gini coefficient, σ convergence and Markvo transition matrix were used to analyze the dynamics of spatial distribution and regional differences in this paper. The research results show that: (1) China's overall ecological efficiency exhibits a U-shaped curve, i.e., decreased first and then increased. (2) The overall difference in eco-efficiency of tobacco planting zone is large, which is mainly originated from the inter-regional differences and hypervariable density. (3)The eco-efficiency development of tobacco planting zone in China does not have the characteristics of convergence, resulting in differences in spatial distribution. (4) The national and regional eco-efficiency of tobacco planting zone has the greatest transfer probability from year t to year t+1 in the same level of eco-efficiency.