Yin Ke,Ren Simin.Spatiotemporal differentiation and driving mechanisms of green transformation of cultivated land in Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2025,32(06):381-390,402.[doi:10.13869/j.cnki.rswc.2025.06.007]
三峡库区耕地绿色转型的时空分异及其驱动机制研究
- Title:
- Spatiotemporal differentiation and driving mechanisms of green transformation of cultivated land in Three Gorges Reservoir Area
- 文章编号:
- 1005-3409（2025）06-0381-10
- Keywords:
- ecologically fragile zone; green transformation of cultivated land; multi-scale drivers; Three Gorges Reservoir Area
- 分类号:
- S718.5
- 文献标志码:
- A
- 摘要:
- [目的] 解析典型生态脆弱区三峡库区耕地利用绿色转型的时空演变规律及其驱动机制，为实现区域耕地资源可持续利用与生态-经济协同发展提供科学支撑。[方法] 基于2007—2021年土地利用、社会经济及地理环境多源数据，构建“空间—功能—模式”三位一体评价指标体系，采用熵值法测度耕地绿色转型水平，并运用时空双固定效应空间杜宾模型解析本地效应与空间溢出效应。[结果]（1）社会经济主导性：人均GDP（总效应0.863）与农业生产总值比重（总效应0.723）通过跨区协同显著驱动转型，而固定资产投资仅作用于本地（直接效应0.103）；（2）空间溢出非对称性：邻近城镇化通过劳动力再分配促进本地转型（间接效应0.410），但邻近人口密度增加引发“虹吸效应”（间接效应-0.199），且优质区位（距中心城市、河流）存在竞争性抑制（间接效应-0.466，-0.376）；（3）地形强约束：坡度与海拔对62%研究区转型形成显著阻碍（总效应-0.654，-0.731），限制机械化与规模化经营。[结论] 生态脆弱区耕地绿色转型需遵循“差异化协同”路径。组建跨区域农业经济联盟，强化人均GDP与农业产值的空间协同；优先在平坦区域（坡度<15°）推进高标准农田建设；对地形复杂区实施生态补偿与耕地指标跨区交易。
- Abstract:
- [Objective] This study aims to investigate the spatiotemporal evolution patterns and their driving mechanisms of green transformation of cultivated land use in the Three Gorges Reservoir Area, a typical ecologically fragile zone, thereby providing scientific support for sustainable utilization of regional cultivated land resources and eco-economic coordinated development. [Methods] Utilizing multi-source data(2007—2021) of land use, socioeconomic statistics, and geographical environment, an evaluation indicator system integrating three dimensions of “space-function-mode” was developed. The entropy method was employed to measure the green transformation levels of cultivated land, and a spatiotemporal dual-fixed-effect Spatial Durbin Model was applied to analyze local effects and spatial spillover effects. [Results] (1) Socioeconomic dominance： GDP per capita (total effect： 0.863) and the proportion of agricultural production value(total effect： 0.723) significantly drove the transformation through cross-regional synergy, while fixed-asset investments only had local effects(direct effect： 0.103). (2) Asymmetric spatial spillover： adjacent urbanization promoted local transformation through labor redistribution(indirect effect： 0.410), but increased adjacent population density triggered “siphon effects”(indirect effect： -0.199). Additionally, premium locations(near urban centers/rivers) demonstrated competitive suppression (indirect effects：-0.466, -0.376). (3) Strong topographic constraints： slope and elevation significantly hindered transformation in 62% of the study area(total effects：-0.654, -0.731), limiting mechanization and large-scale operations. [Conclusion] Green transformation of cultivated land in ecologically fragile zones should adopt a “differentiated coordination” approach forming cross-regional agricultural economic alliances to enhance spatial synergy between GDP per capita and agricultural output； prioritizing high-standard cultivated land development in flat areas(slope<15°)； and implementing ecological compensation with cross-regional cultivated land quota trading in areas with complex terrains.
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备注/Memo
收稿日期：2025-03-11 修回日期：2025-03-24 接受日期：2025-03-28
资助项目：国家社会科学基金一般项目（20BJL02）；重庆市教育委员会人文社会科学研究项目（24SKGH066）
第一作者：尹珂（1981—），男，重庆人，教授，博士研究生，土地利用与生态过程。E-mail：keyin@cqnu.edu.cn