2006-2007年在甘肃省兰州、张掖、酒泉、天水、武威等市县的21个样点采集了不同寄主植物及其根际土壤样本,经分离得到798株镰孢菌,根据其形态特征鉴定出了13种镰孢菌,其中,分离频率最高的3个种依次是木贼镰孢(Fusarium equiseti)、尖镰孢(F.oxysporum)和腐皮镰孢(F.solani),分别占总数31.58%、29.07%和13.03%.其他分离鉴定的镰孢菌包括锐顶镰孢(F.acuminatum)、芬芳镰孢(F.redolens)、轮枝镰孢(F.verticil-lioides)、层出镰孢(F.proliferatum)、黄色镰孢(F.culmorum)、半裸镰孢(F.semitectum)、弯角镰孢(F.campto-ceras),这些镰孢菌的分离频率均低于10%,但高于1.5%。分离频率低于1%的镰孢菌包括三线镰孢(F.tricinctum)、燕麦镰孢(F.avenaceum)及砖红镰孢(F.lateritium). In 2006 and 2007, 21 host plants and their rhizosphere soil samples were collected from 21 sampling sites in Lanzhou, Zhangye, Jiuquan, Tianshui, Wuwei and other cities and counties in Gansu Province. 798 Fusarium strains were isolated and identified according to their morphological characteristics Thirteen Fusarium species were isolated, of which the three most frequently isolated species were Fusarium equiseti, F. oxysporum and F. solani, 31.58%, 29.07% and 13.03%, respectively.Other Fusarium isolates identified include F. acuminatum, F. redolens, F. verticil-lioides, Fpriferatum, F.culmorum, F.semitectum, F.campto-ceras, all with a frequency of less than 10% , But higher than 1.5%. Fusarium isolates with frequencies below 1% include F.tricinctum, F. avenaceum and F. lateritium.