岩溶山区生态服务价值对退耕还林(草)工程的响应

Impact of grain for green project on ecosystem service values in Karst mountains

基于GIS技术,以贵州省麻江县为例,分析岩溶山区退耕还林(草)工程对生态服务价值的影响。结果表明:研究期间,退耕还林(草)工程使该区林地和草地增加2 192.45hm2。旱地转向林地比例最大,呈现出旱地转向林地>未利用地转向林地>旱地转向草地>未利用地转向草地的特点;生态服务价值增加4 536.2×104元。从贡献率看,旱地转向林地>未利用地转向林地>未利用地转向草地>旱地转向草地;从生态服务类型看,调节服务和支持服务对生态系统服务价值增加起主导作用。

Grain for Green Project was a major ecological construction projects. Taking the Majiang County of Guizhou province as an example,this paper analyzed the influence of Grain for Green Project on ecosystem services value in karst mountain by the GIS technology. The results showed that： during the study period,Grain for Green Project made the woodland and grassland increase 2 192. 45hm^2.The conversion of dry land into woodland accounted for the largest proportion. It had the characteristics of conversion of dry land into woodland 〉conversion of unused land into woodland 〉conversion of dry land into grassland 〉conversion of unused land into grassland; Ecosystem services value increased 4536. 2 × 10^4 yuan. Contribution rate had the characteristics of conversion of dry land into woodland 〉conversion of unused land into woodland 〉conversion of unused land into grassland 〉conversion of dry land into grassland. Regulating services and support services played a leading role in the increasing of ecosystem services value from the perspective of ecosystem services types.