吴起县沙棘林地的生态效益评价

Evaluation of Ecological Benefit of Hippophae rhamnoides Forestry Projects in Wuqi County

生态效益的评价和核算对评价林业生态工程的建设效果至关重要。文章以截止2008年底吴起县沙棘造林取得的成绩为基础,估算了增加森林在涵养水源、保护土壤、固碳制氧、净化环境、改善小气候、保护生物多样性等方面在退耕期间所产生的生态效益。结果表明:吴起县沙棘林工程取得了巨大的生态效益,核算后的总生态价值为803020.31万元,其中保护水资源价值为193239.39万元,保育土壤价值为322519.73万元,固碳制氧价值为222247.90万元,净化环境价值为2759.07万元,改善小气候价值为23343.81万元,保护生物多样性价值为38910.40万元。研究结果可为黄土区生态修复工程建设效益评价提供参考。

Valuing ecological effects is crucial to assessment of output of the forestry project. This paper discussed forest function in improving ecological environment included water holding, soil conservation, CO2 fixation and O2, air purification tourism, microclimate improvement and biodiversity increase. The results showed that the land conversion project in Anding city has produced tremendous ecological effects. The ecological value is up to about 803020.31 million yuan （RMB） in total, among which contributed by water resource conservation, soil conservation, CO2 fixation and O2, air cleaning, microclimate improvement and biodiversity increase are 193239.39, 322519. 73, 222247.90, 2759.07, 23343.81 and 38910.40million yuan （RMB） respectively. The results may be a reference for the assessment of ecological effects of the land conversion project being carried out in the Loess Plateau.