| With the development of economical globalization and agricultural market, more and more practice is indicating that reasonable eco-agricultural model plays an important role in agricultural development. The eco-agricultural model taken biogas as a link is of great importance for farmers to get out of poverty and increase income, and there are many such related researches , but the studies based on households were few. The households are not only the mode operation managers of biogas eco-agriculture but also the operator of it. Therefore, the study on the biogas eco-agricultural model has great significance in theory and practice in ensuring farmers'income growth and improving the agricultural eco-environment.This paper focused on Gansu Province as part of the research projects of the Northwest "five matching" ecological agricultural model and its key technical standards for case studies, from the farmers shoes,how this biogas eco-agriculture model help farmers got out of poverty and how improved the income were studied.In this thesis, based on the basic theory of eco-agriculture and the purpose of increasing peasants'income, analysis was conducted to the "five matching" model of orchards biogas in Yongjing County from the structure and effectiveness. On that basis, analysis was unfolded to eco-agricultural models of typical households in Yongjing County by using three-dimensional competition model. After that it constructed evaluation index system, and evaluated the eco-agricultural model of typical households in Yongjing County by AHP, the investigation results and main conclusions were as follows:(1) The eco-agricultural development models of typical households in Yongjing County were various, complex and existed large differences in income. Therefore, farmers with biogas development of ecological agriculture production to increase revenue is also variety. Farmers with small cycle model made full use of mode efficiency and energy efficient material recycling; While farmers with middle and large cycle model focused mainly on planting and breeding production as the mainstay, supplemented with biogas production, which can facilitate high income per capita.(2) The newly gas fermentation lay the foundation for multi-functional and stable development of the eco-agricultural models of typical households. From the results, it can be seen that the factors such as vegetation coverage, profit margins, fuelwood consumption, agricultural commodities rate and multiple cropping index had important influence on the benefits of the mode. Therefore, in future the development of mode should take into consideration these factors.(3) Intensive and highly efficient agricultural production provided raw material for the biogas eco-agriculture; On the other hand, they are also the sources of agricultural pollution, but after the cycle of methane gas, waste resources reused and provided a large amount of organic fertilizer for farmers planting green agricultural products. It could form a big cycle of professional farms-aquaculture-large farmers. In Yongjing County, compared to non-model households, species structure, spatial structure and nutrition structure of "five matching" model households is more reasonable, and which are the key bases to develope variety biogas and related industries.(4) The sustainable development of farmers'biogas eco-agriculture model required necessary material and technical support; The development of farmer biogas ecological agricultural model must be guaranteed circulation of raw materials, water and other elements. At the same time, insulation, safe use and biogas application and other models supporting technology make sure the operation of mode. For example, farmers must grasp new technologies of biogas such as: soaking technology, incubator poultry, greenhouse etc. when farmers understand value of model, the development of this model will continue and maintain the vitality.(5) Initially drawing out the development approaches were fitting for the households biogas eco-agriculture model in Yongjing County. Small cycle model households with county and township industrial restructuring find its leading industries, and increase revenue; As for middle cycle model farmers need to improve the specialized technology and the quality of agricultural products. County ecological cycle mode should be in accordance with the principle of suiting to local conditions, and select suitable pattern for industrial development in the township, and form scale operation leading by the market.(6)At the same time, several proposals were put forward on Yongjing County biogas ecological agriculture,they are as follow:â‘ to strengthen the establishment of rural science and technology system;â‘¡to increase ecological agriculture funding;â‘¢to adjust ecological agricultural model structure in light of local conditions;â‘£to deepen the ecological agriculture propaganda work. |
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