The paper analyzes the frame structure theory, the communication theory, the behavior alternation theory in products, and theory of the agricultural innovation and technology diffusion.

农业技术扩散的理论主要有框架理论、沟通理论、农户行为改变理论和技术创新扩散理论。

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In China, however, the study on innovation diffusion models and their applications is still at an early stage; and it is far behind oversea countries, whether in the theory or in the practice.

然而，我国对扩散模型及其应用的研究尚处于初始阶段，无论是理论研究还是实践应用都与国外先进国家相距甚远。

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