|摘要: 摘要：在资源环境约束趋紧、确保粮食安全底线任务多重压力下，厘清长江经济带粮食生态全要素生产率对深入推进长江大保护至关重要。基于2011-2020年长江经济带110个地级市数据，对粮食生产环节的碳排放、面源污染和生态价值进行测算，构建非期望产出框架下的投入产出体系，运用超效率Slacks-Based Measure 模型和全局Malmquist-Luenberger指数考察长江经济带粮食生态全要素生产率的时空动态特征。研究发现：（1）2012-2020年间长江经济带粮食生态全要素生产率总体呈增长态势，年均增长约0.98%，且其增长源泉主要是技术进步而非技术效率提升所致。（2）从时空特征分析来看，2012-2020年长江经济带各地级市的粮食生态全要素生产率改善的趋势明显，粮食综合技术效率的空间格局的变化趋势无明显规律。（3）在研究期内上游地区的粮食生态全要素生产率指数平均最高，然后依次是中游地区、下游地区。三个区域的粮食全要素生产率都处于递增的状态。因此，在建设农业强国的征程中，要高度重视农业技术进步并不断提升粮食生产技术效率，以此来稳定提升长江经济带粮食生态全要素生产率，同时要根据区域禀赋差异设计针对性提升策略。
|关键词: 长江经济带 粮食生态全要素生产率 数据包络分析 可持续粮食生产
|Spatial and temporal characteristics on ecologicaly total factor productivity growth of grain in the Yangtze River Economic Belt
Tianhongyu, LIuxing, Suzhihao
China Three Gorges University
|Abstract: Abstract:The environmental problem caused by increasing agricultural non-point source pollution and agricultural carbon emissions is one of the main challenges to agricultural sustainable development. In view of the importance of grain production in agriculture, promoting low-carbon and green production of grain is a critical way to cope with agricultural environmental threats. The Yangtze River Economic Belt is the core area of grain production in China, so accurately measuring the ecological total factor productivity of grain in the Yangtze River Economic Belt, then systematically analyzing its temporal and spatial evolution characteristics, which can provide the data basis for promoting the sustainable development of agriculture in this region and realizing the goal of the great protection of the Yangtze River. Based on the grain production data of 110 prefecture-level cities in the Yangtze River Economic Belt from 2011 to 2020, this paper firstly measures the agricultural carbon emission, agricultural non-point source pollution and ecological value of grain cultivation, then constructs a calculation model that includes both desired and non-desired outputs to measure the ecological total factor productivity of grain, and finally applies the super-efficient SBM model and the global Malmquist Luenberger total factor production index to calculate and analyze the ecological total factor productivity of grain in the Yangtze River Economic Belt. The results show that: 1) The ecological total factor productivity of grain in the Yangtze River Economic Belt showed an overall growth trend from 2012 to 2020, with an average annual growth rate of 0.98%.The decomposition index of ecological total factor productivity of grain showed that the technical efficiency index was 0.9998,less than 1,while the technical progress index was 1.0273, greater than 1. The decomposition index indicated that the growth of ecological total factor productivity of grain in the Yangtze River Economic Belt mainly relied on the technical progress rather than the technical efficiency. 2) From the perspective of spatiotemporal characterization, the ecological total factor productivity of grain in all prefecture-level cities in the Yangtze River Economic Belt achieved more obvious improvement from 2012 to 2020, which indicated that the green and sustainable development of grain in this region had achieved relatively good results. In terms of the decomposition indicators of ecological total factor productivity of grain, the technical efficiency indexes of all prefecture-level cities did not show a clear pattern, while the technical progress indexes of each prefecture-level city showed a continuous improvement trend. 3) In terms of regional comparison, the ecological total factor productivity of grain in the upstream area of the Yangtze River was the highest during the study period, reaching 1.0189, followed by the midstream region(1.0111), and the lowest was the downstream region(1.0014). Nevertheless, the ecological total factor productivity of grain was increasing in all three regions in the time dimension. Therefore, in the process of promoting grain sustainable production in the Yangtze River Economic Belt, it is essential to attach great importance to the role of technical progress, meanwhile, it is necessary to make up for the shortcomings of technical efficiency as soon as possible.
|Keyword: Yangtze River Economic Belt Total factor productivity of grain ecology Data envelopment analysis Sustainability of grain production