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| 陕西省粮食生产效率动态演变及空间分布差异 |
| Dynamic changes and spatial distribution differences of grain production efficiency in Shaanxi Province |
| 投稿时间：2024-11-26 |
| DOI：10.13254/j.jare.2024.0925 |
| 中文关键词: 粮食生产效率，空间分布，DEA-Malmquist指数模型，动态演变，核密度，基尼系数 |
| 英文关键词: grain production efficiency, spatial distribution, DEA-Malmquist index model, dynamic change, Kernel density, Gini coefficient |
| 基金项目:国家自然科学基金项目（42171197） |
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| 中文摘要: |
| 研究陕西省各县（市）级粮食生产效率，为保障地方粮食安全提供理论支持。本研究基于DEA-Malmquist指数模型测算了2000—2021年间陕西省101个县（市）的粮食生产效率动态变化情况，在此基础上利用Kernel密度函数和Dagum基尼系数，分析陕西省粮食生产效率的动态演变过程及空间分布差异的主要来源。结果表明：2000—2021年，陕西省大部分地区粮食生产效率稳步增长，年均增速为 1.60%；技术进步是粮食生产效率提升的主要原因；101个县（市）有 69个县（市）存在不同程度的投入冗余。核密度分析显示，粮食生产效率在波动中上升，增长速度先慢后快。全省大部分地区粮食生产效率增减趋势趋于一致，但粮食生产效率空间非均衡性上升。部分地区粮食生产效率极高或极低，陕北-陕南、关中-陕南地区之间的差异是空间非均衡性上升的主要来源。2000—2021年，陕西省粮食生产效率稳步增长，不同地区由于基础设施、科技水平等差异，造成粮食生产效率空间非均衡性上升。未来建议从提升农业科技水平、稳定粮食播种面积、优化投入冗余、保持农业政策均衡性四个方面入手，整体提高陕西省粮食生产效率。 |
| 英文摘要: |
| This study aimed to provide theoretical support for ensuring local food security by investigating grain production efficiency in counties（cities）of Shaanxi Province. Based on the DEA-Malmquist index model, the dynamic changes in grain production efficiency across 101 counties（cities）in Shaanxi Province from 2000 to 2021 were calculated. Kernel density functions and Dagum Gini coefficients were utilized to depict the dynamic change process and the primary sources of spatial distribution differences in grain production efficiency in Shaanxi Province.The results indicated that from 2000 to 2021, most regions in Shaanxi Province experienced a steady increase in grain production efficiency, with an average annual growth rate of 1.60%. Technological progress was the main driver of the improvement in grain production efficiency. Among the 101 counties（cities）, 69 exhibited varying degrees of input redundancy. Kennel density analysis showed grain production efficiency increased over time but with fluctuations, and the growth rate accelerated over the period. Most areas in the province showed consistent trends in grain production efficiency increases or decreases, although spatial non-uniformity in grain production efficiency rose. Some regions had extremely high or low grain production efficiency, with the disparities between northern Shaanxi-southern Shaanxi and central Shaanxi-southern Shaanxi being the primary contributors to this spatial non-uniformity.From 2000 to 2021, grain production efficiency in Shaanxi Province steadily increased. Differences in infrastructure and technological levels among different regions led to rising spatial non-uniformity in grain production efficiency. Moving forward, it is recommended to focus on four aspects：enhancing agricultural science and technology levels, stabilizing grain planting areas, optimizing input redundancies, and maintaining balanced agricultural policies. These efforts aim to comprehensively improve the grain production efficiency in Shaanxi Province. |
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