Presence Of Arbuscular Mycorrhizae In Saline Soils On Livestock Farms

Abstract

The present study consisted of determining the percentage of colonization of arbuscular mycorrhizal fungi (AMF) associated with roots of Angletón grass (Dichanthium aristatum) Benth from cattle farms belonging to the sub-region of the Gulf of Morrosquillo, department of Sucre, Colombia. A total of 35 cattle farms were sampled, from which 10 soil samples with roots were taken per farm at a depth of 20 cm. AMF spores were isolated from each sample, and morphospecies were separated and identified using taxonomic keys. The percentage of colonization of the collected roots was determined using staining methods. Results. The multifactorial ANAVA between the variables spore density/100 g soil and percentage of colonization as a function of livestock farms showed highly significant differences. The results reported a colonization percentage of 22 ± 76% and a mean of 41.4%. For the number of spores/100 g of soil, values of 353 ± 2137/100 g of soil and a mean of 931,8 spores/100 g of soil were reported. Conclusions. This preliminary study carried out in the Colombian Caribbean shows the diversity, population density and percentage of AMF colonization associated with Angletón grass in soil conditions of cattle farms in the Gulf of Morrosquillo sub-region.