There was a decline of AMF species with the degradation degree of grasslands: there was 10 species AMF which belonged to 4 genus in normal grassland, while there were only 7 species of 2 genus of AMF in seriously degraded grassland.

• 草原退化导致AM真菌种群数量减少:正常草原中AM真菌4个属10种,高于严重退化草原2个属7种。