退耕还林对河北顺平县土地利用变化及生态系统服务价值的影响

退耕还林工程的实施，使区域的土地利用与生态环境发生了变化。为定量研究该区域退耕前后土地利用与生态服务价值的变化情况，本文应用Costanza生态系统服务价值计算公式和谢高地等人的中国陆地生态系统单位面积生态服务价值表，对顺平县2001-2008年土地利用变化对生态系统服务价值的影响进行了分析。结果表明:土地利用变化主要体现为耕地、其他农用地、未利用地的减少和园地、林地、建设用地和水域的增加；顺平县的生态系统服务价值在退耕还林期间呈逐年增加的趋势，其生态服务价值与总人口、GDP和农民人均纯收入均表现为显著正相关，反映出退耕还林工程对其生态、社会、经济等方面均起到了一定的积极作用。

Effects of Returning Cultivated Land to Forest on Land Use Change and Ecosystem Service Values of Shunping County in Hebei Province

With the implementation of the project of returning farmlands to forests, the land use and ecological environment in the region is changing. In order to study the change of land use and ecosystem service value during the period of returning cultivated land to forest, this paper analyzed the effects of land use change on ecosystem service values in Shunping county from 2001 to 2008 by using the table of China land ecosystem service values of unit area, ESV computing formula, and ESV coefficients. Results showed that the land use change is mainly reflected by the decrease of cultivated land, other agricultural land and unused land, as well as the increase of orchard and perennial plantations, forest land, built-up and associated land and water area. And the total value of ecosystem service of land use in Shunping county increases year by year, and is significantly positive with the population, GDP and per capita net income of farmers, which indicated that the project of returning cultivated land to forest played a certain positive role in ecology, society and economy.