中文摘要：

从系统动力学角度，剖析了合作农业推广的主体要素、辅助要素和环境要素三大动力结构及其功能，认为利益驱动、技术带动、政府推动和市场拉动是合作农业推广的四大动力来源，提出了推广物品属性、交易成本和合作协同三大动力原理，并以广东省金稻种业的合作农业推广为例，对合作农业推广的动力机制进行了实证分析，最后提出了多元农业技术推广组织合作动力机制的优化措施。

英文摘要：

From the perspective of system dynamics , this paper analyzes the subject elements , auxiliary and environmental elements of cooperative agricultural extension , as well as their functions;we consider interests driven , technology driven , government-push and market-pull are four power sources of organiza-tional cooperation;and the attributes of agricultural extension services , transaction costs and coordinated organization operation are three power principles in the motivation mechanism .Then we use Golden Rice Seeds Co ., LTD.of Guangdong province as an example , make an empirical study on the motivation mechanism of agricultural extension , and finally some optimization measures are put forward .