中文摘要：

喀斯特地区作为一种典型的土地生态环境区域,对其土地利用系统健康状态和趋势进行评价是诊断由人类活动引起的土地利用系统破坏和退化程度的重要手段.该文在界定土地利用系统健康评价概念的基础上,通过土地利用系统的结构性指数、功能性指数和效益指数构建评价指标体系,建立土地利用系统健康评价的三角模型,并对 2005-2012 年贵阳市土地利用系统的健康状态和趋势进行了分析和评价,提出了优化土地利用系统健康状态的路径.结果表明：贵阳市土地利用系统的健康水平先后经历了不健康、亚健康、初级健康和中级健康 4 个状态阶段,具有逐渐向高级健康状态发展的趋势,在未来应该优化土地资源配置,提升经济建设基础保障水平并结合自然优势,充分利用土地发展绿色生态经济,充分利用先进信息技术水平,建立土地利用系统健康状态预警系统以优化土地利用系统的健康水平.该研究能够为生态脆弱区的土地利用及保护提供理论和实践参考.

英文摘要：

As the main reason of land use changes, human activities will result in not only economic but also eco-environmental and social effects. Currently, the protection of land resources has been a hot issue due to the prominent contradiction between human and land. The assessment of land use health can diagnose the damage and degradation degree caused by human activities, which is the foundation of sustainable land utilization. In Karst region which is one of the most ecologically fragile areas, land restoration is extremely difficult once the eco-environment is damaged. In order to protect the land use system and diagnose the health status in Karst region, this research proposed a triangle model to assess the health status of land use system and its changing trend in Guiyang city, which is a typical Karst region in China. The study period was from 2005 to 2012, and the data used in this paper were collected from Guiyang Statistical Yearbook （from 2005 to 2013）, Guiyang Land Use Update Survey Table （from 2005 to 2012）, Guiyang Water Resources Official Reports （from 2005 to 2013）, Guiyang Environment Official Reports （from 2005 to 2013） and China Environmental Statistics Yearbook （from 2005 to 2013）. Firstly, the research defined structured index, functional index and beneficial index to reflect the health status of land use system. To match the requirement of establishing a triangle model, the first 2 indices had to be converted to non-structured index and non-functional index respectively, to form a relationship of trading off and taking turns among these 3 indices. Then, a triangle graphic could be drawn to illustrate the health status of land use system and its changing trend during the 8 years according to the 3 indices above. The result showed that the non-structured index totally had a declined trend from 2005 to 2012 except 2007, the non-functional index had a fluctuated trend and the beneficial index had an uptrend from 2005 to 2012. The health status of land use system in Guiyang city was