| Agricultural science and technology parks have the functions of technology integration, research, design and diffusion, undertaking the responsibility to lead the development of the region. Farmers are the final adopters of agricultural technologies and the exercisers of the transformation of agricultural technology into productivity. Therefore, research on the farmers' technical adoptions under the background of agricultural science and technology parks' technical diffusions is very important, it can guide farmers' technical perceptions, technical adoption and arrangements of productive essentials, and also can provide important references to the agricultural science and technology parks on agricultural technologies' researching and diffusing. Thus, based on the lack of realization about farmers' technical adoption's characteristics and laws, this dissertation takes farmers into the consideration of the systemic frame of'agricultural science and technology parks-radiation districts' to research the process and characteristics of farmers'adoption, through normative and demonstrative researches combining with quantities and qualities researches, aimed to provide references of technical adoption and diffusion to the parks, extend the perspective of park economic research in economic geography, and advance the application of communication theory in agricultural technology diffusion.This dissertation follows the logic of'theory construction-demonstration analyze-strategy', and take Dingxi agricultural science and technology park as object to carry out this research. First, this dissertation adopts human-economic geography, behavioural geography, agricultural geography and communication theory, design the models and the concepts in the pre-during-post phases of farmers' adoption, and constructs the theoretic frame of demonstration research. Then, adopts GIS visional show, structural equation model, Logit model, DEA model,SFA model and other methods, analyzes the peasants' technology perception and their trend influences, technological demands, technological-deciding factors, technological efficiency and farm-living effects, summarizes the laws and characteristics of different phases of adoptions. At last, it discusses the parks'technological diffusion system and provides the strategies to technological diffusion. The main contents and conclusions are as follows: (1) The discussion about the farmers'technological adoption. This dissertation puts forward the concept of farmers'technological perception and designs its'measuring dimension, modifies the traditional variables of farmers'technological adoption, introduces technological efficiency and living frame theory into analysis of farmers'technological adoption effects, constructs the whole-process research frame of pre-during-post views about technological adoption, and then sets relative models and chooses the testing methods.(2) Typical analysis of technological center, spread districts and technological types in case study area. It shows that Dingxi agricultural science and technology park has got a lot of achievement on the technology research and diffusion, such as technological research and innovation, farming technologies, dry farming technologies and leading enterprises driving the development of regional agriculture. It can be seen clearly from potato farming patterns' evolution in Gansu province and the whole nation, this case area is an important potato production district in our country, and its dominance has been higher and higher. Dingxi agricultural science and technology park has developed a series of relatively muturing potato farming technologies.(3) Measurement of variable dimensions about farmers'technological perception, and verification of technological perception's effects on technological adoption preferences based on structure equation model. It shows that the6potential variables and the21measuring variables have significant differences on score average. Those potential variables'rank is perceptional values, adoption intention, technological risks, perceptional interests, perceptional costs and health risk perception. The main factors which effect farmers' perceptional values and technological adoption intendance is technological profits. While technological cost, technological risks and health risks during using have very limited effects. Farmers'genders, ages, education level and other personal characteristics, the living area topography, the park's radiation zones and whether to participate in the cooperatives (the leading enterprises base) and other variables also have different significant effects on the6methods which past verification.(4) Analysis of farmers'technological demand preference and worry factors after adoption, and the technological and non-technological factors which effect farmers'technological adoption. It shows that there is high accordance on farmers between the most demanding technologies and the worry factors after adoption; technological properties itself has some effects on farmers' technological adoption; decision makers' ages, education level, risk preferences and other personalities, family farmland, quantity of labour force, income and family production and nature endowments, allowance and the landforms are all have different effects on the adoption of intermediate non-poison potato farming technology and more commercial film laminating technology.(5) The measurements of farmers' technological efficiency through DEA and SFA methods, and analyze farmers'living effects on technological adoption through field research method. It indicates that there is a large improving space of complex farming efficiency, pure technological efficiency and scale efficiency of sample farmers;56.72%farmers are in scale increasing return stage, and can improve efficiency by increasing farming scale; there is over-input of all factors; capital, labours and field have positive effects on technical efficiency; farming scale and radiation circle have significant effects on technical efficiency; decision makers'education level, family labours, family average farmland, whether is in leading enterprises base, choosing cost all have significant effects. The differences between average efficiency of the2methods suggests that there is low-level trap of farmers' technological efficiency in case district. Farmers'living effects of technological adoption indicates, farmers' living form has formed technological path-dependence effects.(6) The empirical study indicates that, technological diffusion of Dingxi agricultural science and technology park conform to theory about innovation spatial diffusion and distance attenuation rule in geography. Now in the spatial system which is composed of the park and it's radiation area, have already formed an primary'core-peripheral'structure, the park and it's secondary parks as the core elementary, and the surrounding agricultural production area as the peripheral area. The analysis about farmers'adoption of agricultural technology in different radiation circle also shows that, technological diffusion of the park has significant distance attenuation rule.(7) Based on the previous study, this dissertation puts forward the countermeasures to promote the technology diffusion of the park and doption of the farmers. The main contents as follows:reconstruction of diffusion system, education and measurement of farmers' technical conception, regulation of technology market, efficiency of technical service, investment to the farmers'human capital, organization and scale of agricultural production, effect of technology adoption, arrangement about the technology service node, etc. |
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