| Sumario: | Livestock activities cause a significant impact on the environment due to the release of N into the soil, which in turn results in nitrification and the emissions of greenhouse gases (GHG). At Corpoica’s Turipaná Research Center (Cereté, Colombia), we evaluated three different genotypes of B. humidicola (CIAT 16888, CIAT 26159, and CIAT 679) with three levels of nitrogen fertilization application (0, 150, and 300 kg ha-1) in order to determine the flow dynamics of GHG and their relationship to growth and forage production. The results indicated that the best genotype, in terms of production, was CIAT 16888, with an dry matter production of 2,075.32 kg ha-1, a height of 46.87 cm, and leaf/stem ratio of 2.51, with no significant differences with genotype CIAT 679, but with genotype CIAT 26159 (P ≤ 0.05). The flow of GHG (methane and nitrous oxide) increased as the N levels increased, indicating a significant correlation between the grass’s growth and total flows.
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