Abstract: Based on clarifying of land ecological security and taking Hebei Province as the case, this article discusses the methods of security evaluations of land ecology. In accordance with the commonly accepted index of security evaluation on regional land ecology, a system of 22 indexes suitable for this region is established. By adopting the principle of systematic analysis and the security matrix of land ecology, calculation for the two year (2000 and 2004 respectively) status is carried out. The results show that the comprehensive security status of land ecology is labeled “sensitive grade" for 2000 while “alarming grade" for 2004. It indicates that the land security status in Hebei Province in both 2000 and 2004 is in the “unsafe" state with the tendency of deteriorating. The main causes for the deterioration of land ecological security are the population booming, unreasonable reclamation, soil erosion, overgrazing, extensive farming and so on.

Key words: land ecology, security evaluation, index, analytical hierarchy process, Hebei Province

摘要： 以河北省为例，在界定土地生态安全概念的基础上，探讨了土地生态安全评价的方法。依据区域土地生态安全评价一般性指标体系， 建立了适合该区的由22项指标组成的土地生态安全评价指标体系。运用层次分析原理和土地生态安全模型对该区2000 年和2004 年的土地生态综合安全值进行了计算，研究结果显示，河北省土地生态综合安全状况在2000年属于“敏感级”，在2004年属于“风险级”，均处于“不安全”状态，且有不断恶化的趋势。人口增长过快、土地污染、滥垦、滥伐、过度放牧以及粗放经营的生产方式是导致该省土地生态安全状况不断下降的主要原因。

关键词: 土地生态, 安全评价, 指标体系, 层次分析法, 河北省