Jia Nan, Yang Hongbo, Lan Xin, Li Yinshuai, Song Yongze, Zhang Zehua, Song Wen, Zhao Rui, Ma Tianwu, Chen Ruishan
School of Design, Shanghai Jiao Tong University, Shanghai 200240, China.
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, China Academy of Sciences, Beijing 100085, China.
iScience. 2025 Apr 15;28(5):112426. doi: 10.1016/j.isci.2025.112426. eCollection 2025 May 16.
Soybeans have experienced massive growth in trade due to diet transitions. Large imports reduce expected returns for soybean growers in importer countries, influencing occupational choices and potentially facilitating population mobility, though the distant correlation's impact remains unclear. We develop a framework integrating diet dynamics, trade indexes, and human mobility. We found: (1) dietary transition promotes human mobility through global soybean trade; (2) rural areas contribute far less than urban areas, illustrating decoupling between rural regions and international trade; (3) enhancing rural-trade coupling could improve dietary and crop flow in rural regions; (4) the study provides a new perspective on how dietary transition promotes human mobility. These findings help policymakers identify soybean trade strategies for socioeconomic development and formulate interventions to optimize population distribution. By addressing rural decoupling, we emphasize aligning rural areas with global trade to mitigate mobility pressures and socioeconomic disparities, without altering original terms.
由于饮食结构转变，大豆贸易经历了大幅增长。大量进口降低了进口国大豆种植者的预期回报，影响职业选择，并可能促进人口流动，不过这种远距离关联的影响仍不明确。我们构建了一个整合饮食动态、贸易指数和人口流动的框架。我们发现：（1）饮食结构转变通过全球大豆贸易促进人口流动；（2）农村地区的贡献远低于城市地区，表明农村地区与国际贸易之间存在脱钩现象；（3）加强农村与贸易的耦合可以改善农村地区的饮食和作物流动；（4）该研究为饮食结构转变如何促进人口流动提供了新视角。这些发现有助于政策制定者确定促进社会经济发展的大豆贸易战略，并制定优化人口分布的干预措施。通过解决农村脱钩问题，我们强调使农村地区与全球贸易接轨，以减轻流动压力和社会经济差距，同时不改变原有条件。
