中文摘要：

小陇山林区位于秦岭西端,甘肃省东南部,是黄河、长江中上游地区重要的水源涵养林,对维护黄河、长江流域水生态安全具有重要的战略地位。采用市场价值法、替代费用法等对小陇山林区森林生态系统服务功能价值进行定量评估。结果表明,小陇山林区森林生态系统服务功能年均总价值为40.236亿元,其中直接经济价值为2.204亿元,水源涵养、水土保持、大气组分调节、生物多样性保护及病虫害防治、休闲娱乐等生态功能价值为38.032亿元,直接经济价值与生态功能价值的比值为1∶17.26。在发展当地经济的过程中,必须从整个生态系统的角度出发,优先认识到该地区森林的生态功能价值,从而科学、合理地保护和利用森林资源。

英文摘要：

Xiaolong Mountain woodland, located in the west of the Qinling Mountains and the southeast of Gansu Province, provides an important role as ＂blue barrier＂ for the Loess Plateau. This area is also a crucial forest ecosystem that conserves water sources to the middle and lower reaches of the Yellow River and the Changjiang River and guarantees ecological safety of these two large river watersheds in China. Based on the accumulated and collected data of this area, service function of the forest ecosystem was evaluated using the market valuation method and substitute cost method. Results show that the annual average value of the service function of the Xiaolong Mountain forest ecosystem was estimated at around 40. 236 × 10^8 yuan RMB, among which direct economical value amounted to around 2. 204 × 10^8 yuan RMB and ecological value around 38. 032 × 10^8 yuan RMB,forming a ratio of 1： 17.26. Obviously the latter is much larger and more important than the former. Based on these estimations and conclusions, it is suggested that in developing local economy, first priority attention be given to understanding ecological value of the local forest ecosystem, so as to protect and exploit forest resources reasonably and scientifically.