关键词: 粮食生产, 生态效率, 期望产出, 非期望产出, 粮食主产区

Abstract: To evaluate the ecological efficiency of grain production, in order to provide scientific basis for the formulation of policies related to the protection of grain planting environment, and promote the sustainable development of grain production. Based on the panel data of 13 major grainproducing areas in China from 2010 to 2019, this paper adopted SBMDEA model to conduct an empirical study on the ecological efficiency of grain production in each major grainproducing area, and made an overall analysis, difference analysis and efficiency loss analysis of the results. In the sample period, the average ecoefficiency of grain production in the 13 main grainproducing areas was 0.709, which was far lower than the average value of 0.899 without considering the undesired output, and the overall trend is fluctuating upward; The major grainproducing areas have great difference in the ecoefficiency level of grain production, the ecoefficiency of grain production of Jilin, Heilongjiang, Jiangxi, Hunan and Sichuan are higher level, Inner Mongolia, Henan and Hubei can reach the middle level, the rest of the major grainproducing areas are lower level, and higher efficient provinces are mainly distributed in the north and the south, lower efficient provinces are mainly distributed in the central region; The redundancy rate of input and unexpected output of Jilin, Heilongjiang, Jiangxi, Hunan and Sichuan was lower, in addition to this, the redundancy rate of input and undesired output of the other eight major grainproducing areas was higher. The overall level of ecoefficiency of grain production in major grainproducing areas in China is not high, mainly because some major grainproducing areas have not realized efficient green development, the resource utilization efficiency in grain production is not high, and there is a lot of redundancy in input and undesired output. According to the research results, the following three suggestions were put forward: promoting the green, balanced and efficient development of the major grainproducing areas; improving the efficiency of resource utilization, reducing nonpoint source pollution and carbon emission; giving consideration to the economic and environment benefits of agricultural subsidy policy

Key words: grain production, ecological efficiency, expected output, undesired output, major grainproducing area