[目的]评价我国西北平原地区林业的生态服务功能.[方法]通过对西北平原地区林业的调查与监测,以县为最小单位,采取普查与典型调查相结合的调查方法,在评价上利用物质量评价法对西北地区平原林业的生态服务功能进行了评估.[结果]2005年西北地区平原林业在涵养水源、保持土壤、植被固碳、土壤固碳、植被制氧、吸收二氧化硫和滞尘方面均发挥了巨大作用,其各自生态服务功能值分别为32075.8万m3/a、2.8×106万t/a、1254万t/a、2752.8万t/a、3354.3万t/a、53.0万t/a和8510万t/a.[结论]为我国西北地区平原林业的生态服务功能研究奠定了基础.%[ Objective ] The paper aimed to evaluate the plain forestry' service function in Northwest China. [ Method ] Based on general and representative investigations with county used as the minimum unit,evaluation on service function of plain forestry ecosystem in Northwest China was carried out by measuring the quality and quantity. [ Result] In 2005 ,the plain forestry in Northwest China play a profound role in water and soil conversation,carbon sequestration by vegetation and soil ,oxygen release by plants, sulfur dioxide absorption and so on. [ Conclusion] This paper laid foundation for research on service function of plain forest ecosystem in Northwest China.
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