开封市土地利用时空变化的生态系统服务价值评估

选取开封市1990-2010年四期土地利用的动态数据，采用Costanza、谢高地等提出的生态系统服务价值公式和系数，对开封市生态系统服务价值进行定量分析。结果表明:1990-2010年间生态系统服务价值从51.714 86亿元减至50.294 62亿元，生态系统服务价值年均变化率为0.137%，土地利用变化引起生态服务价值呈下降趋势，年均减少7.101 2万元。表明该市土地利用规划在取得经济效益的同时，却导致了土地生态效益的降低。因此，制定合理的土地利用规划，采取合理的土地利用方式，建立可持续的土地利用模式，从而在社会经济发展的同时提高土地利用的生态效益。

Evaluation on Ecosystem Services Value of Spatial-Temporal Feature of Land Use Changes in Kaifeng

With 4 series of dynamic data of Kaifeng’s land use ranging from 1990 to 2010, Costanza’s and Gaodi Xie’s formulae and coefficients of ecological system’s service value are employed to carry out a quantitative analysis on the ecological system’s service value of Kaifeng. It shows that: the ecological system’s service value drops down from 5.171 5×10⁹ yuan to 5.029 5×10⁸ yuan i. e. decreasing with an annual rate of 0.137%. Land use change causes the ecological system’s service value shrinking down gradually, by 7.101 2×10⁶ yuan each year. The result proves that for the city of Kaifeng, though more economic benefit is achieved, the ecological benefit is being undermined. Therefore, in order to increase the ecological benefit of land use simultaneously with social-economic development for Kaifeng, appropriate land use planning, rational land use types, and a sustainable land use mode should be taken into account with close scrutiny.