农业产业-资源系统耦合不仅表现为两子系统之间耦合协调作用的程度,而且表现为这种协调作用下系统的耦合效率。以黄土丘陵区典型流域纸坊沟流域为例,采用耦合协调度模型与DEA方法,揭示农业产业-资源系统耦合效应:一系列水土保持政策和措施显著改善了区域农业资源环境条件、促进了农业产业的发展,并提高了二者的耦合协调度,然而在此协调趋势下,资源环境条件向产业效益转化的效率却只在很小幅度的波动中变化,水土保持在提高系统的耦合效率方面作用甚微。究其原因主要是由于在林草地资源大量闲置和利用不充分的状况下,农业产业结构与资源结构尚存在较大偏差,系统的这种结构性矛盾影响了其耦合效率,系统演变过程中潜伏了较大危机。为此,需要保证现有林草资源得以充分利用、林果业和畜牧业得以有序发展的经济、政策环境,并在此基础上优化系统的资源与产业结构,转变资源利用和产业发展方式。

The coupling of agricultural industry-resources system is characterized by not only the degree of two subsystems coupling coordination function, but also the coupling efficiency. Coupling coordination degree model and DEA method was used to evaluate the agricultural industry-resources system coupled effect in Zhifanggou Watershed. The results showed that: soil and water conservation improved regional agricultural resources conditions, promoted the agricultural industry development, and improved their coupling coordination degree, during the 25 years in the study area, agricultural industry comprehensive value and agricultural resources comprehensive value increased by 0.427 and 0.764 respectively, the combination of coupling coordination degree increased 0.672. However, during the 10 years after the implementation of cropland conversion, since little or inadequate utilization of resources, the development of agricultural industry has been obviously lower than the increase of agricultural resources, caused the coordination degree of system coupling fluctuated and appeared to fall again in the final, and a crisis in system coupling coordination was made. In addition, compared to the significant and continuous improvement of resources and environments, the conversion efficiency from resources conditions to industrial benefit only changed in a small fluctuation amplitude, water and soil conservation worked little in improving the system coupling efficiency. According to the results of DEA projection analysis, the reasons were as follows: under the circumstances of little or inadequate utilization of woodland and grassland resources, the agricultural structure and resources structure differed greatly, and the system structural contradiction affected its coupling efficiency, and system evolution process lurked in a large crisis. Therefore, we need to ensure relevant economy and policy environment which will benefit to making full use of woodland and grassland resources and to development of animal husbandry, forestry and fruit industry. Then, the system resources and industrial structure need to be optimized, and the way of the resource utilization and industrial development need to be changed.