| Since soil and water conservation has changed the original dynamic evolution ofagriculture system, this thesis is to explore the components and main influencing factorsthereof by one descriptive analysis. After that, referring to the system theory, soil and waterconservation elements affecting agricultural economic system and agricultural ecosystemwere integreted into one system. Furthermore, soil and water conservation system andagricultural resources industry system and its subsystems coupling evolution process wasanalysed and quantified by the coupling coordination degree model. Thus, interaction processwas divided into4stages on2levels, while the2coupling relationship and its evolutionprocess was clear. On this basis, in terms of soil and water conservation as well as theindicators system of agricultural resources and agricultural industry, the agricultural resourcesallocation efficiency of all villages and towns in Ansai County was evaluated over yearsoperating the DEA model. By the DEA invalid unit projection analysis, the longitudinalcomparison and horizontal regional comparison of our study area were committed to adjustindex and propose corresponding strategies.With the impact of human activities, the soil and water conservation promoted theimprovement of ecological environment and changed the land use structure as well asstructure and condition of Ansai’s agricultural resources-industry system. Meanwhile,agricultural system internal resources structure adjustment and which caused industrialrestructuring avoided the extensive mode of production and promoted the implementation ofsoil and water conservation.The coupling evolution process could be compartmentalized into4phases: harmoniousdevelopment, worn development, damaged soil and water conservation achievements limit thedevelopment of agricultural system, and agricultural system development sustainably in thecase of damaged Soil and Water Conservation achievements. The coupling relations in AnsaiCounty had experienced the first two phases and the last two phases is established in theory.In terms of the system coupling degree, soil and water conservation and agricultural resources industry system were in harmonious development phase(0°＜θ＜20°) from1984to2007;While, the coupling degree of agricultural internal system changed clockwise andexperienced phases as followed: agricultural resources-industry harmonious development（0°＜α＜60°）from1984to1999, industry lag period（270°＜α＜360°）from2000to2004andresources lag period（120°＜α＜150°）from2006to2007.However, from2008to2010,the results of soil and water conservation continuously cemented(336°＜θ＜354°) andagricultural internal system experienced resources lag period (110°＜α＜120°);In addition,according to fitting results in figure4-3and the reality, the recession (180°≤α＜270°)ofagricultural system may appear in the future which require optimizing behavior of farmersand scientific government policy to avoid.The efficiency of agricultural resource allocation of the temporal (many years) andspatial scales (many townships) in Ansai County was evaluated by using DEA model. Theresults of many years of DEA relative efficiency showed the technical efficiency changerepresented irregular fluctuations, which showed there was no significant development ofagricultural production and management and the configuration efficiency of the agriculturalresources was not high enough. While the configuration of the agricultural resources and theindustrial structure had been constantly adjusted, various soil and water conservationmeasures were still not reasonable enough. The results of many years DEA relative efficiencyalso showed the change of the scale efficiency represented that returns to scale increased orstayed unchanging, which showed that the agricultural resources dispersion lead to the lowscale efficiency which resulted in being unable to adapt to the demand for the development ofagriculture under the background of new technologies and new soil and water conservationpolicy. The results of different townships of DEA relative efficiency showed that theconfiguration efficiency of the agricultural resources was related to the geographical conditionin2010.The utilization rate of agricultural resources in the southernpart of Ansai was higherthan that in the central and northernpart of Ansai. Although environment had been improvedand resources increased by adjusting soil and water conservation measures in the central andnorthernpart of Ansai, the quantity of resources converted to agricultural output was lessefficient than that in the southern part. On the basis of the above results from differenttownships, the longitudinal time comparison and transverse regional comparison in the studyarea were performed and the direction of adjustment and the adjustment amount of theindicators were given. Specifically, the proportion of the total area of forest and grassland inagricultural land should be cut by1.6percentage points and the proportion of forestry andanimal husbandry output value in the output value of farming should be raised by1.4 percentage points based on the original. In addition, agricultural and industrial structure ofZhuanyaowan township could be the reference of development of Jianhua township.According to the above analyses and referring to the location advantage, the agriculturalindustry chain network structure should be perfected according to local conditions as well asthe agricultural industry structure should be adjusted by constructing the rural land marketand clearing the forestry property rights in order to reduce leaving unused and waste ofresource and ensure the balanced and sustainable development of agriculture. |
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