基于物元分析的土地生态安全评价

针对综合指数评价存在的信息屏蔽和主观性问题，该研究采用物元分析法对中国土地生态安全进行评价。在诠释土地生态安全概念的基础上，基于“经济-环境-社会”模式和层次分析法构建土地生态安全评价指标体系，运用物元分析方法构建土地生态安全评价的综合评判模型，并以河北省为例进行了实证研究。结果表明：从2005－2007年河北省土地生态安全整体上呈现出由临界安全向较安全跃升的趋势，2004年之后的河北省环保政策和措施绩效明显；人均耕地面积、农药施用量和工业废水排放达标率成为制约河北省土地生态安全水平的因素。从而得出结论：物元模型能够揭示单个评价指标的分异信息，物元分析方法适用于土地生态安全评价。

Evaluation of land eco-security based on matter element analysis

Focusing on the problems of information shield and subjectivity of the comprehensive index evaluation in China, this paper evaluated land eco-security with the theory of matter element analysis. After analyzed the concept of land eco-security, an index system was established based on Economy-Environment-Society framework and analytic hierarchy process (AHP). An integrated assessment model was constructed with the support of matter-element model. Then the assessment model was applied to Hebei Province. Consequently, the results indicated that the whole level of land eco-security in Hebei Province had been in improving trends that jumping to general security from critical security condition, so it was remarkable performance of environmental protection policy and measures in Hebei Province since 2004; and the indexes of cropland acreage per capita, consumption of farm pesticide and discharge standardized rate of industrial waste water were key factors limiting the level of land eco-security in Hebei Province. It is concluded that the matter element model can reveal different information of every single index, and matter element analysis is suitable for evaluating land eco-security.