关键词: “双循环”背景, 政府引导和监管, 乡村生态农业振兴产业链主体协同, 演化博弈

Abstract: General Secretary Xi Jinping proposed in 2020 to build a new development pattern of“dual cycle”, and for agriculture as the basic industry, its industrialization development is the basis for building a “domestically large cycle as the main body” strategy. Studies have found that the key to the continuous and healthy development of the agricultural industry chain is the efficient synergy between industrial subjects. Among them, the government's guidance and supervision played an important role. However, there are currently few research results in this aspect. Based on this, this article takes the “dual cycle” as the background, and takes a typical case of the rural ecological agricultural revitalization industry chain based on the ecological breeding community in Ji'an, Jiangxi. It analyzes the government's guidance and regulatory behavior through numerical simulation on the selection of the main strategy of rural ecological agriculture industry chain.
This article mainly adopts the evolutionary game analysis method, based on the connotation and significance of the rural ecological agricultural revitalization industry chain under the context of fully analyzing the “dual-cycle”, with the breeding industry, planting and processing industry. Among them, in terms of the assumptions of the model symbol, this article considers the impact of market transaction costs for each subject, government-guided agricultural subsidies, and betrayal costs of corporate defaults. The strategy of the game subject is expressed by changing parameters. Based on the constructed game model, the three subjects of the three main body of the rural ecological agricultural revitalization industry chain are used to calculate the dynamic equation of each game subject based on the game matrix, and the evolutionary decision path of the game subject is analyzed; Lee Yapanov's first method, calculate the ebic comparison matrix characteristic value of each strategy balance point, analyze the evolutionary stability conditions of each equilibrium point; then use the MatlaBR2019A software for numerical simulation, test the effectiveness of the model analysis, and ensure that the effectiveness of the model analysis is to ensure the effectiveness of the model analysis. On the basis of effective models, the impact of government guidance and regulatory behaviors is made of numerical simulation, and corresponding management countermeasures are proposed according to the simulation results. The parameter assignment adopted by simulation is based on the actual significance of the parameter, and fully considers the size relationship between the parameters to assume the assumption.
The government guidance agricultural subsidy policy has obvious guidance to the development of the main strategy of the industrial chain to cooperate with cooperation, and improves the new momentum of guiding agricultural subsidy policies to activate the high-quality development of rural ecological agriculture. The economic benefits of the main body of the industry, the government strengthen the prevention and supervision and supervision of agricultural surface source pollution, strengthen the social responsibility and ecological responsibility awareness of the industrial subject, is a key factor for the choice of cooperation between various industries. The prevention and control of agricultural facial source pollution can help promote the development of rural ecological agricultural revitalization industrial chains with the core of support, planting, and addition as its core; Rural ecological agricultural rejuvenation industry chain joint meeting system, guide the industry to formulate standardized agricultural industry chain main body cooperation behavior specifications, and calculate the scientific and reasonable industrial chain main body breach of contract costs to help promote the evolution of cooperation between the main strategies of the product of the industry chain of rural ecological agriculture.

Key words: the background of “dual circulation”, rural ecological agriculture revitalization of the main body of the industrial chain coordination, government guidance and supervision, evolutionary game