海南岛土地生态安全评价

Evaluation on Land Ecological Security in Hainan Island

以海南岛为研究区,在介绍研究区概况的基础上,依据1999～2008年《海南统计年鉴》、1999～2008年《海南年鉴》、2000～2004年《海南生态省建设年鉴》等数据,依据科学性、代表性、综合性、简明性、可操作性、适用性等原则,结合海南岛特殊的地理环境特点,基于"压力—状态—响应"(P-S-R)概念框架模型,以土地生态压力、土地生态状态、土地生态响应为子系统,共选取18项指标,构建了土地生态安全评价指标体系。运用层次分析原理和综合评价法建立了土地生态安全评价模型,利用此模型对2000～2007年海南岛的土地生态安全状况进行评价和分析,根据评价结果从促进土地资源可持续利用和维护生态安全的角度提出了具体的对策与建议。结果表明,2000～2007年海南岛土地生态安全处于敏感级(预警状态),2007年处于良好级(较安全状态),并且土地生态安全水平整体上呈逐年增加的趋势;制约海南岛土地生态安全水平的因素主要是人口自然增长率、单位播种面积粮食产量、城市化水平、人均耕地面积、土地资源后备资源率、全社会固定资产投资增长率、农村居民人均纯收入等。

Based on the introduction of Hainan island and the special feature of its geographical environment,land ecological pressure,land ecological status and land ecological response are taken as the subsystems with in all 18 indices selected according to the 1999-2008 Hainan Statistical Yearbook,1999-2008 Hainan Yearbook,2000-2004 Hainan Ecological Construction Yearbook,as well as the principles of science,representativeness,comprehensiveness,simplicity,operability and applicability.Land ecological security assessment index system is established based on the ＂P-S-R＂ conceptual framework model.Land ecological security evaluation model is set up by using Comprehensive Evaluation Method and Analytical Hierarchy Process Theory,which can be used to evaluate and analyze the land ecological security in the years 2000-2007.According to the evaluation result,specific countermeasures and suggestions are put forward in order to promote the sustainable use of land resources and to maintain the ecological security.Result shows that land ecological security of Hainan island is at the sensitive level （early-warning state） in the years 2000-2007 and at good level （relatively security state） in the year 2007.Land ecological security as a whole shows an increasing trend year by year.Factors restricting the level of land ecological security of Hainan island are mainly the natural population growth rate,grain production per unit sown area,urbanization level,per capita cultivated land,reserve resources rate of land resources,total fixed asset investment growth rate,per capita net income of rural residents and so on.