Investigation of climate, Soil physico-chemical properties and host on Arbuscular mycorrhizal fungi activity in Rafsanjan

The present study aimed to investigation of root colonization percent and spore population of Arbuscular mycorrhizal fungi (AMF) in soils of 9 regions of Rafsanjan city. Also the effect of climate and some physical and chemical properties of soil including pH, EC, organic carbon, amount of absorbed P and B soil and amount of silt, sand and clay on these two factors were evaluated. Samples were collected from the rhizosphere of different plants and AMF spores were isolated from the soil samples using the wet sieve method. After root staining and spore extraction of spores from soil, root colonization and spore population determined. Az the results all samples have arbuscular mycorrhizal symbiosis. The average root colonization percent ranged from 17.7% in Western suburb to 83.3 % in Raviz and the average spore population per 10 gr of soil samples ranged from 5.68 in Western suburb to 139.2 in Davaran. There was significant and positive correlation between the spore population and root colonization percent (α= 0.01). There was significant and positive correlation between the percent of sand and organic carbon with spore population and root colonization percent (α= 0.01). correlation of measured indices with pH, EC, P, B, silt and clay showed significant and negative correlation(α= 0.01). furthermore, the results showed that the root colonization percent and spore population in each region is related to the host plant and climate as wel.