土壤微生物直接参与养分循环、有机质分解等诸多生态过程,尤其在陆地生态系统C循环中发挥着重要作用(Pascual et al.,2000;Harris,2003;Schipper et al.,2001)。由于微生物对外界胁迫的反应要比植物和动物敏感,因此,微生物群落的大小、组成和活性在不同的管理措施之间差异明显(Bossio et al.,1995;Panikov,1999)。土壤微生物指标已经用来评价退化生态系统中生物群系与恢复功能之间的联系,并能为退化土地恢复提供有用的 Soil microorganisms are directly involved in many ecological processes such as nutrient cycling and organic matter decomposition, and play an important role especially in the C cycle of terrestrial ecosystems (Pascual et al., 2000; Harris, 2003; Schipper et al., 2001). Because microbial responses to external stresses are more sensitive than those of plants and animals, the size, composition and activity of microbial communities differ significantly between management practices (Bossio et al., 1995; Panikov, 1999). Soil microbial indicators have been used to assess the linkages between biomes and restoration functions in degraded ecosystems and to provide useful