通过阐述林业的生态环境效应 ,结合甘肃土地荒漠化和林业建设的实际 ,论述了林业建设与土地荒漠化的利害关系。并最终强调 :甘肃特有的地理气候环境决定了林业在生态环境及国民生产领域中的重要地位和作用 ,甘肃的土地荒漠化防治离不开林业建设 Through elaborating the eco-environmental effect of forestry and combining with the reality of land desertification and forestry construction in Gansu, the relationship between forestry construction and land desertification is discussed. And finally emphasize: Gansu unique geographical and climatic environment determines the forestry in the ecological environment and national production in the important position and role, desertification prevention and control of Gansu is inseparable from the forestry construction