Ecological research on Arbuscular mycorrhizal fungi from the rhizospere of Caragana korshinskii in Northwest arid region

In this investigation we separated 12 AMF species of 4 genera,among which 6 species belong to Glomus,3 species belong to Acaulospora,1 species belongs to Gigaspora,and 2 species belong to Scutellospora.G.constrictum and G.mosseae are dominate species.The total colonization is up to 59.98% and the average spore density is 830.59/100 g soil.The speices and ecological distribution of AM fungi in different sites are notably different.The spore density has a positive correlation with hypha and total colonization rate;moreover it is significantly correlated with soil available N content.Arbuscule and soil organic matter are positively correlated.Total and hypha colonization are positively correlated with soil pH.