| 摘要: |
| 目的 农技推广是科技成果转化为生产力的重要组成部分，揭示基层农技推广的空间溢出效应对于制定合理的农技推广策略以促进农业高质量发展和实现农业现代化具有重要意义。方法 文章引入卫星遥感影像识别2013—2018年桂林市5个柑橘主产县柑橘覆膜面积，利用ArcGIS客观准确地刻画5县全部乡镇的农技推广效果及其动态过程，在时空特征分析的基础上，通过空间计量经济学模型实证检验农技示范和农技培训两种主要农技推广形式在乡镇层面产生的空间溢出效应。结果 （1）基层农技推广在乡镇层面存在空间溢出效应，即在一个乡镇进行农技推广也会对其他乡镇产生积极影响；（2）对于桂林市柑橘覆膜技术，农技示范推广措施具有明显的空间溢出效应，而农技培训不具有；（3）桂林市主产县的柑橘覆膜技术的扩散呈现渐进式扩散为主、跳跃式扩散为辅的空间规律和先快速增长、后稳定发展的时间规律。结论 基于不同的基层农技推广形式对技术扩散的促进效果和扩散效应，提出差异化配置农技推广资源、引导社会力量创办农业科技园区和发挥社会网络在农户信息传播中的作用的政策建议。 |
| 关键词: 基层农技推广 空间溢出效应 空间计量模型 时空特征 卫星遥感数据 |
| DOI：10.7621/cjarrp.1005-9121.20250212 |
| 分类号:F329.9 |
| 基金项目:国家社科基金重大项目“新形势下我国粮食安全战略问题研究”（22&ZD079）；国家自科基金面上项目“视频化推广对数字农业技术采用的影响机制研究：基于知识约束的视角”（72173050） |
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| SPATIAL SPILLOVER EFFECTS OF TOWNSHIP-LEVEL AGRICULTURAL TECHNOLOGY EXTENSION——AN EMPIRICAL STUDY USING SATELLITE REMOTE SENSING DATA |
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Xiong Hang1,2, Yu Yawen1,2, Zhou Wei1,3, Hu Chen1, Xu Baodong1,3
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1.Macro Agriculture Research Institute, Huazhong Agricultural University, Wuhan 430070, Hubei, China;2.College of Eocnomics & Mangement, Huazhong Agricultural University, Wuhan 430070, Hubei, China;3.College of Resources & Environment, Huazhong Agricultural University, Wuhan 430070, Hubei, China
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| Abstract: |
| Agricultural technology extension is an important part of the transformation of scientific and technological achievements into productivity. Revealing the spatial spillover effects of township agricultural technology extension is of great help for improving agricultural technology extension strategies from the county level or higher level to promote high-quality development and modernization of agriculture. Therefore, taking citrus mulching technology as examples, the panel data of 60 townships in Lipu, Yangshuo, Yongfu, Lingchuan and Quanzhou in Guilin city was used to analyze the rule of the diffusion of the two agricultural technology extension methods, demonstration and training, at the township level. Firstly, the statistical analysis and ArcGIS technology was used to analyze the spatio-temporal rule of the diffusion of citrus plastic mulching technology. Secondly, spatial spillover effects of the two agricultural technology extension methods were tested by using spatial econometric models. Our findings showed that: (1) Township agricultural threefold extension imposed spatial spillover effects. That was, the extension services in one town could facilitate the technology diffusion in other towns. The closer the spatial distance was, the more farmers communicated with each other, so the spatial spillover effect between neighboring towns was stronger. (2) For easy technologies, demonstrations had strong spatial spillover effects whereas training had no significant effect. Demonstrations not only had the direct impact, but also had a greater spillover effect. (3) The diffusion of the use of plastic film in the studied area followed a strong spatial and temporal pattern. In the spatial dimension, plastic mulching technology formed a diffusion pattern with Xiuren Town and Baisha Town as the source of diffusion, with asymptotic diffusion as the mainstay and jump diffusion as the supplement. In terms of time, the diffusion of citrus plastic mulching technology experienced a rapid growth stage and entered a stable development stage temporally. According to these findings, we propose policy suggestions for improving the efficiency of agricultural technology extension by utilizing the spatial spillover effects: Firstly, differentiated allocation of agricultural technology promotion resources should be adopted. In formulating agrotechnology promotion strategies, full consideration should be given to such factors as the attributes of agricultural technology, the agricultural characteristics of each township and the level of farmers' literacy, so as to formulate targeted promotion strategies. Secondly, guiding social forces to create agricultural science and technology demonstration parks. On the one hand, the number of parks should be increased and their locations optimized in order to give full play to the direct and indirect effects; on the other hand, social forces should be actively guided to jointly set up demonstration parks of high scientific and technological standards. Thirdly, utilizing the role of social networks in the dissemination of information to farmers. The application of Internet technology in social networks in agrotechnology promotion should be expanded, and farmers should be encouraged to actively participate in agrotechnology exchanges and give full play to their subjective initiative. |
| Key words: township-level agricultural technoloy extension spatial spillover effects spatial econometric models spatial and temporary patterns satellite remote sensing data |
