title: Effect of Fodder Tree Species with Condensed Tannin Contents on In vitro Methane Production.
abstract: The objective was to evaluate the effect of fodder tree species (FTS) with condensed tannin contents: Cordia elaeagnoides, Platymiscium lasiocarpum, Vitex mollis, and Haematoxylon brasiletto, on in vitro methane (CH4) production at 24 h post incubation. The analysis was performed using the in vitro gas production technique, with three levels of inclusion/species: 600, 800, and 1,000 mg and with 4 replicates/species/level of inclusion. The substrate was incubated at 39°C, and the gas and CH4 production were recorded at 4, 8, 12, and 24 h post incubation. The data collected was analyzed through Pearson correlation, polinomial regression and fixed effects models. There were negative correlations between FTS-total gas volume (r = -0.40; p<0.001); FTS-volume of CH4 produced (r = -0.40; p<0.001) and between the inclusion level-volume of CH4 produced (r = -0.20; p<0.001). As well as a positive correlation between hours post incubation-total gas volume (r = 0.42; p<0.001) and between hours post incubation-volume of CH4 produced (r = 0.48; p<0.001). The FTS: C. elaeagnoides, V. mollis, and H. brasiletto have potential, in the three inclusion levels analyzed, to reduce CH4 emission on in vitro trials (>32.7%), taking into account the total CH4 production at 24 h of the forage used as reference (Avena sativa). It's suggested that C. elaeagnoides-according to its crude protein, neutral detergent fiber, and condensed tannins content- is the best alternative within the FTS analyzed, for feeding ruminants and for the control of CH4 emissions during the dry season.
authors.affiliation: Faculty of Veterinary Medicine and Zootechny, Autonomous University of Yucatan, CP 97315, México .
authors.forename: Ernestina Gutiérrez
authors.initials: EG
authors.lastname: Vázquez
authors.affiliation: Faculty of Veterinary Medicine and Zootechny, Autonomous University of Yucatan, CP 97315, México .
authors.forename: Leonardo Hernández
authors.initials: LH
authors.lastname: Medina
authors.affiliation: Faculty of Veterinary Medicine and Zootechny, Autonomous University of Yucatan, CP 97315, México .
authors.forename: Liliana Márquez
authors.initials: LM
authors.lastname: Benavides
authors.affiliation: Faculty of Veterinary Medicine and Zootechny, Autonomous University of Yucatan, CP 97315, México .
authors.forename: Aureliano Juárez
authors.initials: AJ
authors.lastname: Caratachea
authors.affiliation: Faculty of Veterinary Medicine and Zootechny, Autonomous University of Yucatan, CP 97315, México .
authors.forename: Guillermo Salas
authors.initials: GS
authors.lastname: Razo
authors.affiliation: Faculty of Veterinary Medicine and Zootechny, Autonomous University of Yucatan, CP 97315, México .
authors.forename: Armin Javier Ayala
authors.initials: AJ
authors.lastname: Burgos
authors.affiliation: Faculty of Veterinary Medicine and Zootechny, Michoacan University of San Nicolas de Hidalgo, CP 58130, México .
authors.forename: Ruy Ortiz
authors.initials: RO
authors.lastname: Rodríguez
keywords: Condensed Tannins; Fodder Tree Species; In vitro; Methane