基于结构方程模型的陕北退耕区农业产业-资源系统耦合机制分析--以吴起县为例

Analysis of the Coupling Mechanism of Agricultural Industryresources System in De-farming Regions of Northern Shaanxi Province Based on Structural Equation Model——A Case Study of Wuqi County

农业产业-资源耦合机制通过改变农业资源利用方向和强度调控农业产业-资源系统耦合路径,影响系统耦合效果。利用结构方程模型,通过对典型退耕区域——陕北吴起县2016年497户农户调研资料的分析,验证了政策、信息(技术、市场)、农业资源、农业产业是系统耦合机制的基本构成和重要驱动要素,该县域已形成了相对稳定的多维链型耦合机制。在这一机制作用下,农业产业有所发展,但仅停留在资源显性利用上,农业产业-资源系统局部相悖,系统对经济效益总的标准化路径系数为0.112,且产业对经济效益的路径系数仅为-0.047;从各驱动要素间相互作用来看,农业产业与农业资源单向作用,系统部分链网缺失,说明目前的耦合机制不能有效支撑农业产业-资源系统的良性运行,具体表现为:未充分挖掘林草生态系统的经济功能,资源未达到最优配置。因而,下一步需通过对政策、信息(技术、市场)、农业资源、农业产业等要素的优化组合,构建新的良性耦合机制,进而实现吴起县农业产业-资源系统的优化耦合,促进退耕区生态文明建设。

The agricultural industry-resources coupling mechanism affects the coupling effect and regulates the coupling path of agricultural industry-resources system by changing the direction and intensity of the utilization of the agricultural resources. Using structural equation model, we analyzed the survey data from 497 households of Wuqi County in 2016, a typical area of de-farming regions. It is verified that policy, information （technology, market）, agricultural resources and agricultural industry are the basic components and important driving factors of the agricultural industry-resources system coupling mechanism, and Wuqi County has formed a relatively steady multi-dimensional chain coupling mechanism. Through this mechanism, the agricultural industry has developed to a certain extent. However, it only utilizes the manifest value of resources, which hampers the optimization of the coupling relationship of agricultural resources and agricultural industry. The total standardized path coefficient of economic benefits is 0.112, and the path coefficient between the industry and economic benefit is only-0.047. From the perspective of the driving factors＇ interaction, the one-way effect between agricultural industry and agricultural resources and the lack of part of the system chain network indicated that the current coupling mechanism cannot effectively support the benign operation of agricultural industry-resource system. For example, the economic function of forest-grass ecosystems is not fully investigated, and the resources allocation have not reached the optimal status. Therefore, a new benign coupling mechanism should be built next through the optimized combination of policy, information （technology, market）, agricultural resources and agricultural industry so as to realize the optimal coupling of agricultural industry-resources system in Wuqi County and promote the construction of ecological civilization in the de-farming area.