Parameters’ setting.

Guarantee the initial information of the agri-food supply chain (AFSC) authenticity based on the blockchain is a complex problem. This paper develops an evolutionary game model of AFSC participants based on the blockchain and discusses the impacts of the key parameters on the dynamic evolution process of participants. To verify the theoretical results, simulation experiments and sensitivity analysis were conducted through Matlab 2022b. The study results show that: (1) Guaranteeing the initial information authenticity could become the common belief of all AFSC participants, with the scientific design of parameters; (2) Higher reward and synergistic effect, lower information cost and risk contribute to improving the probability of initial true information sharing. (3) when the default penalty is too severe, the enterprise will evolve into not sharing the initial true information. Finally, this study could provide some suggestions and countermeasures for the leading enterprise in the agricultural supply chain and local governments to guarantee initial information authenticity in China. That is the way to realize the sustainability of AFSC in the long run.

基于区块链保障农业食品供应链（agri-food supply chain, AFSC）的初始信息真实性是一项复杂课题。本文构建了基于区块链的农业食品供应链参与主体演化博弈模型，并探讨了关键参数对参与主体动态演化过程的影响。为验证理论研究结论，本文通过Matlab 2022b开展了仿真实验与敏感性分析。本研究结果表明：(1) 通过科学设计相关参数，保障初始信息真实性可成为所有农业食品供应链参与主体的共同共识；(2) 更高的奖励力度与协同效应、更低的信息成本与信息风险，均有助于提升初始真实信息的共享概率；(3) 当违约惩罚过于严苛时，企业会演化至不共享初始真实信息的状态。最后，本研究可为我国农业供应链核心企业与地方政府保障初始信息真实性提供相关建议与对策方案，这亦是实现农业食品供应链长期可持续发展的可行路径。