RT Journal Article T1 Mitigation of ruminal methane production with enhancing the fermentation by supplementation of different tropical forage legumes A1 Aragadvay-Yungán, Ramón Gonzalo A1 Barros-Rodríguez, Marcos A1 Ortiz Vera, Luis Tomás A1 Carro, María Dolores A1 Navarro Marcos, Carlos A1 Elghandour, Mona Mohamed Mohamed Yasseen A1 Salem, Abdelfattah Zeidan Mohamed AB The aim of this research was to evaluate the influence of forage species adapted to the tropical region of Ecuador on gas production, enteric methane, digestion, and ruminal fermentation. The tree forage evaluated were C. arborea, E. fusca, B. forficata, E. poeppigiana, C. argentea, G. sepium, C. tora, and F. macrophylla. Ruminal fluid of four adult sheep fistulated with permanent cannulas in the rumen was used in the in vitro gas production technique. The in vitro gas production parameters were lower (P < 0.05) in the C. arborea (A = 41.68 mL gas/g DM, c = 0.044%/h and Lag = 1.654 h) and the average gas production rate for B. forficata was 1.017 mL/h (P < 0.05). C. arborea presented higher (P = 0.0001) effective degradation and real DM digestibility (40.461 g/kg and 82.51 mg/g, respectively). With respect to VFA, the highest (P < 0.05) proportion of acetic, propionic, and butyric was observed in C. arborea, G. sepium, and E. poeppigiana (72.52, 23.09, and 7.44 mol/100 mol, respectively) and the lowest (P = 0.0001) ratio: acetic/propionic was observed in G. sepium (2.92 mol/100 mol). The content of NH3-N (mg/L) showed no difference. The lowest (P = 0.0001) methane production was observed in C. arborea (1.23 mL CH4/g DM). The use of forage species of tropical climate rich in secondary metabolites in ruminant diets has the capacity to reduce the gas production and enteric methane; however, this is at the expense of the reduction of the fermentation of organic matter in the rumen PB Springer SN 0944-1344 YR 2021 FD 2021 LK https://hdl.handle.net/20.500.14352/127369 UL https://hdl.handle.net/20.500.14352/127369 LA eng NO Aragadvay-Yungán, R. G., Barros-Rodríguez, M., Ortiz, L., Carro, M. D., Navarro Marcos, C., Elghandour, M. M. M. Y., & Salem, A. Z. M. (2022). Mitigation of ruminal methane production with enhancing the fermentation by supplementation of different tropical forage legumes. Environmental science and pollution research international, 29(3), 3438–3445. https://doi.org/10.1007/s11356-021-15749-7 NO Author ContributionsG. Aragadvay-Yungán, M. Barros-Rodríguez, L.T. Ortiz, M.D. Carro, C. C.N. Marcos, and A.Z.M. Salem: designed the experiment, conducted the experiment, data analysis, writing, and review of the manuscript; G. Aragadvay-Yungán C.N. Marcos and L.T. Ortiz: conducted the experiment, performed the laboratory analyses, and wrote the manuscript; G. Aragadvay-Yungán, Abdelfattah Z.M. Salem, and Mona M.M.Y. Eghandour: prepared and revised the manuscript for submission. DS Docta Complutense RD 30 nov 2025