基于多维评价模型的农业多功能性价值评估

农业多功能性理念有助于重新全面认识农业诸多功能并为其评价提供分析框架.文章在考虑农业各项功能间相互独立但冲突关系的基础上构建多维评价模型.结合数据可获得性、评价方法与指标选取原则,应用三维评价模型对我国农业的食物生产、经济和生态功能进行定量评价.应用因子分析法对三大功能的主要影响因子进行提取;根据三大功能的价值间不同组合类型,用分层聚类法将我国农业分为九类情景模式.研究结果显示,多维评价模型能够在充分利用现有统计数据的基础上,对农业的生产、经济和生态功能进行较准确的价值评估,模型模拟结果及情景聚类基本符合我国农业发展现状.该多维评价模型具有很大的灵活性,可用于其他领域中不同尺度的多目标价值评估.

EVALUATION OF MULTI - FUNCTIONALITY OF AGRICULTURE BASED ON MULTI-DIMENSION EVALUATION MODEL

The idea of multi-functionality of agriculture provides a framework for identifying and evaluating all-around functions of agriculture.A multi-dimensional evaluation model for assessing the multi-functionality of agriculture is proposed to image the variety of roles that agriculture play,by taking the independent and conflicting relationship among them into account.Considering the availability of data,evaluating methodology and principle for indicator selection,productive,economic and ecological roles of Chinese agriculture are evaluated,in which principal components are extracted as influential factors with Factor Analysis Method,and nine scenarios are clustered with Hierarchical Cluster Method according to the components scores.The research shows that multi-dimension evaluation model can make full use of existing statistical data to evaluate three most important functions of Chinese agriculture,with simulation results corresponding to the actual situation very well.The model is flexible enough to be used in multi-objective evaluation in different spatial scales for other disciplines.