Nódulos presentes en leguminosas asociadas a pasturas de Brachiaria sp en la Amazonia Colombiana

J. C. Blanco; A. Y. Páramo; M. A. Montilla

doi:10.30972/vet.3215642

Authors

J. C. Blanco Universidad de la Amazonia. Grupo de Investigación GIPSA.
A. Y. Páramo Universidad de la Amazonia. Grupo de Investigación GIPSA.
M. A. Montilla Universidad de la Amazonia. Semillero de Investigación SIEPSA.

DOI:

https://doi.org/10.30972/vet.3215642

Keywords:

legumes, nodulation, pastures, Brachiaria sp

Abstract

Twenty-three Brachiaria sp. pastures were studied, dedicated to dual purpose bovine production to identify species of legumes present and obtain root samples for extraction and nodule counting. The entire area corresponded to a total of 149.14 ha, where only 84.26 ha had the presence of the legumes Desmodium sp, Pueraria phaseoloides, Galactia striata, Arachis pintoi, Estilosantes sp, Mimosa púdica and Centrosema sp, whose coverage was 2.89% of that area. The species with the highest percentage of average coverage was A.pintoi with 5.36% followed by Stylosanthes sp with 5%, G.striata with 3.89% and P.phaseoloides with 2.62%. The rest were found in a range of less than 2% of the pasture area. A minimum of 7 nodules were found in the roots of Centrosema sp. and G.striata and a maximum number of 194 nodules in Desmodium sp. The amounts greater than 100 nodules per plant only corresponded to Desmodium sp, which reveals a satisfactory inoculation that is associated with its potential for nitrogen fixation mediated by symbiosis. The species with the lowest number of nodules was M.pudica found in 4.3% of the pastures evaluated, being the only one of the legumes sampled that is not consumed directly by bovines and develops as an unwanted species, indicating degradation levels of pastures.

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