土地生态环境条件是区域社会经济可持续发展的基础。本研究以安徽省为例，根据“自然-社会-经济”复合系统理论构建土地生态安全评价指标体系，应用云理论，将正态云模型与熵权法引入安徽省土地生态安全评价研究中，揭示近10年来安徽省土地生态安全状况、演变规律及障碍因子。研究结果表明：①2005年、2010年和2013年，安徽省土地生态安全水平分别处于一般、良好和健康水平，土地生态安全状况趋于良性发展；②基于综合指数评价方法，2005年、2010年和2013年的土地生态安全水平评价结果分别为0.184 8、0.342 4和0.473 0，表明安徽省土地生态安全处于稳步上升趋势，与云模型评价结论一致；③指标隶属度分析显示，2005年、2010年和2013年，安徽省土地生态安全处于良好及以上水平的指标分别为7个、13个和17个，处于上升趋势；而一般及以下水平的指标分别为16个、10个和6个，处于下降趋势。因此，近10年来，安徽省土地生态系统整体状况趋于良性发展，在一定程度上体现了生态文明建设对土地生态系统的优化效应。

A set of evaluation indexes was established with the help of the ecological system of ‘nature-society-economy’ to solve fuzziness and randomness problems in the land ecological evaluation of Anhui Province. The normal cloud model and entropy weight theory are introduced to present study. The entropy weight method was used to the calculate the evaluation weight of factors, and the normal cloud model was used to describe the grade of land ecological security in Anhui Province under 23 indexes. The results showed that: 1) from 2005 to 2010 and 2013, the grade of land ecological security in Anhui Province increased from general to good and excellent status. 2) The values of land ecological security obtained with the comprehensive evaluation method were 0.1848, 0.3424 and 0.4730 in 2005, 2010 and 2013, respectively. These results suggested that the land ecological security in Anhui Province was improved continuouslly during last ten years, which was consistent with the results obtained by the normal cloud model. 3) The analyses of evaluation indexes indicated that there were 7, 13 and 17 indexes at good and excellent levels, and 16, 10 and 6 indexes at a general level in 2005, 2010 and 2013, respectively. Overall, the status of land ecological security in Anhui Province tends to be good performance in recent ten years, which was attributed to the conservation culture promotion in the province.

F301；X826

国家自然科学基金项目(41471422)、安徽省高校省级优秀青年人才基金重点项目(2013SQRL047ZD)和安徽省财政、住建厅徽派建筑保护省级专项(HPZX2013-01)资助。