Considering an agricultural production and consumption system composed of the government, enterprise, farmers and consumers, this paper constructs models for green agricultural technologies (GATs) extension based on the contract farming and cooperative, so as to investigate the interaction mechanism between promotion strategies and agricultural industrial organizations (AIOs) as well as its effect on GATs extension. The results show that direct subsidy and indirect incentive both can promote GATs, but the incentive mechanisms of the two promotion strategies are different; under the two AIOs, the optimal promotion strategy to the government is related to the coefficient of indirect incentive cost, and the direct subsidy and indirect incentive both have advantage intervals; given promotion strategies of the government, the combination of direct subsidy and the cooperative can increase the profit of green farmers, while the combination of indirect incentive and the contract farming can increase the amount of green farmers; based on interaction mechanism, the combination of indirect incentive and the contract farming as well as the combination of direct subsidy and the cooperative both can achieve Nash equilibrium from perspectives of the government and enterprise, however, the maximum promotion effect of GATs can be achieved only within its advantage interval. Thus, our research can provide theoretical guidance for governments to make better decisions on promotion strategies, and also is helpful to enterprises to choose optimal AIOs in the process of green transformation of agriculture.
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