This study was conducted in order to determine if inoculation with arbuscular mycorrhizal fungi (AMF) and soil amendment with compost would enhance the tolerance of fountain grass to high level of salinity and alkalinity found in urban soils. AMF-inoculated and non-inoculated plants were planted in growing media non-amended and amended with compost and irrigated with water containing 3.3 g NaCl∙dm-3, 10.5 g Na2CO3∙dm-3, or 6.3 g CaCl2∙dm-3. Electrical conductivity (EC) of each watering solution was 6.3 S∙m-1. Plants were watered with salty waters every week until some leaves were necrotic. All the investigated salts decreased the decorative value of fountain grass and the percentage of root colonization by AMF. NaCl and Na2CO3 also decreased the dry matter of plants. Mycorrhization improve growth parameters and aesthetic value of fountain grass treated with all the tested salts and cultivated without compost supply. Compost supply was beneficial for fountain grass growth and quality if plants were cultivated in substrates unpolluted with NaCl, CaCl2, and Na2CO3.
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