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The objective of this study was to compare the diversity of arbuscular mycorrhizae associated colosoana grass (Bothriochloa pertusa (L) A. Camus) and angleton (Dichanthium aristatum, Benth) present in livestock farms in the municipalities of Corozal and Tolu, Department of Sucre, Colombia. Was determined density esporas/100gr soil and roots percentage of colonization in both species of grass. From the isolated morphotypes proceeded to the species identification using taxonomic keys. The results of analysis of variance for density g of soil spores/100 show highly significant difference between pasture and locality. The highest density of spores found was 1160 ± 6233 and 2643 ± 444 g soil spores/100 respectively for colosoana and angleton in the municipalities of Corozal and Tolu. The percentage of colonization showed highly significant difference between pasture and locality. The Tukey test showed highly significant difference between the percentage of colonization for colosoana and angleton in the municipalities of Corozal and Tolu. A total of 32 morphotypes were isolated MA, 15 for Corozal and the rest in the Tolu. There is a high diversity of MA associated with these two pastures in different edaphoclimatic conditions, the department but there are still studies to predict dispersal patterns and location of these specific agroecosystems mycorrhizae in pastures in the department of Sucre.

Diversidad de micorrizas arbusculares en agroecositemas de pastura del departamento de sucre