榆次区土地利用与生态服务价值动态研究

Dynamic study on the value of land use and ecological service in Yuci District

基于2005年、2009年、2013年3时段山西省晋中市榆次区土地利用数据,采用土地利用类型动态度探讨榆次区土地类型变化情况,得出其演变规律。参照谢高地修订的生态服务价值当量因子表及生物量修正因子,利用Costanza模型,揭示研究区土地利用变化与生态服务价值的动态关系。研究表明:榆次区2005-2013年间总生态服务价值减少,变化量主要体现在2005-2009年,草地的减少和建设用地的增加是总生态服务价值减少的最主要原因,而林地始终提供着较高的生态服务价值,因此优化土地利用结构,加强绿地建设和生态用地的保护是缓解榆次区生态服务价值问题的关键。

Based on the land use data of Yuci District,Jinzhong City,Shanxi Province in 2005,2009 and 2013,it used use the dynamic degree of single land use type to discuss the change of land use in Yuci District. By using the Costanza model,referring to the ecological service value equivalent factor and biomass correction factor,it reveals the dynamic relationship between land use change and ecological service value( ESV) in the study area. The research showed that the total ESV decreased in 2005-2013. This change was mainly reflected in 2005-2009,and grassland decrease and construction land increase are main reasons of the reduced total ESV. The forest area increased firstly and then decreased,but due to the fact that the forest has high ecological service value,it provided high ecological service value at all time. It is not difficult to see that the population growth,urbanization and government policies were the main driving factors of land use change in Yuci District; therefore,the optimization of land use structure,the construction of greenbelt and the protection of ecological land use are the keys to alleviate the problem of ecological service value.