基于主成分分析法和层次分析法的宁阳县农地效益评价及方法比较

Evaluation on the Efficiency of Rural Land in Ningyang County with Principal Component Analysis and Analytic Hierarchy Process and the Comparison between Two Methods

农地利用不仅要实现较高的经济效益、社会效益、生态效益和综合效益,而且要求3 个子系统之间相互协调.本文以宁阳县为研究区,构建农地效益评价指标体系,分别采用主成分分析法和层次分析法测算2001～2010 年农地效益,变异系数法计算农地系统协调度.结果表明：①宁阳县农地经济、社会及生态效益均在2002 年出现最低值,之后呈上升趋势.其中,社会效益最好,生态效益波动较大,经济效益最低.②农地综合效益总体呈上升趋势,农地系统协调度波动较大,2002 年出现最低值,2005 年以后维持在相对较高水平.③两种方法评价结果总体一致,但生态效益、农地系统协调度在个别年份有较大差异.研究结果可为宁阳县提高农地效益和促进土地协调利用提供依据.

Process of agricultural land use not only involved achievement of higher economical, social, ecological andcomprehensive efficiency, but also required coordination between three sub-systems. This paper takes Ningyang asresearching object, constructs indicator system. Principal component analysis and analytic hierarchy process wererespectively used to compute 2001-2010 agricultural land efficiency, the coefficient of variation method were used tocompute coordination degree. The evaluation results showed： ①Economical, social and ecological efficiency of Ningyangagricultural land reached lowest in 2002, and then upward. In three sub-systems, social benefits was the best, ecologicalbenefits fluctuated, economic efficiency was the lowest. ②Comprehensive efficiency went up overall. Coordination degreefluctuated, reaching lowest in 2002, and kept at a relatively high level after 2005. ③Results of two evaluation methods aregenerally consistent, except that ecological efficiency and coordination degree differed in some particular years. The resultsprovide reference for Ningyang to improve agricultural land efficiency and promote coordination use of land resources.