Effects of quebracho tannin extract on intake,digestibility, rumen fermentation,and methane production in crossbred heifers fed low-quality tropical grass |
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| Authors: | A T Piñeiro-Vázquez G Jiménez-Ferrer J A Alayon-Gamboa A J Chay-Canul A J Ayala-Burgos C F Aguilar-Pérez J C Ku-Vera |
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| Institution: | 1.Facultad de Medicina Veterinaria y Zootecnia,Universidad Autónoma de Yucatán,Mérida,Mexico;2.Instituto Tecnológico de Conkal. División de Estudios de Posgrado e Investigación. Avenida Tecnológico s/n,Conkal,Mexico;3.El Colegio de la Frontera Sur (ECOSUR) Carretera Panamericana y Periférico Sur s/n,San Cristóbal de las Casas,Mexico;4.El Colegio de la Frontera Sur (ECOSUR), Unidad Campeche,Campeche,Mexico;5.División Académica de Ciencias Agropecuarias,Universidad Juárez Autónoma de Tabasco,Villahermosa,Mexico |
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| Abstract: | The aim of this work was to evaluate the effect of quebracho tannins extract (QTE) on feed intake, dry matter (DM) digestibility, and methane (CH4) emissions in cattle fed low-quality Pennisetum purpureum grass. Five heifers (Bos taurus × Bos indicus) with an average live weight (LW) of 295 ± 19 kg were allotted to five treatments (0, 1, 2, 3, and 4% QTE/kg DM) in a 5 × 5 Latin square design. Intake, digestibility, and total methane emissions (L/day) were recorded for periods of 23 h when cattle were housed in open-circuit respiration chambers. Dry matter intake (DMI), organic matter intake (OMI), dry matter digestibility (DMD), and organic matter digestibility (OMD) were different between treatments with 0 and 4% of QTE/kg DM (P < 0.05). Total volatile fatty acid and the molar proportion of acetate in the rumen was not affected (P < 0.05); however, the molar proportion of propionate increased linearly (P < 0.01) for treatments with 3 and 4% QTE. Total CH4 production decreased linearly (P < 0.01) as QTE increased in the diet, particularly with 3 and 4% concentration. When expressed as DMI and OMI by CH4, production (L/kg) was different between treatments with 0 vs 3 and 4% QTE (P < 0.05). It is concluded that the addition of QTE at 2 or 3% of dry matter ration can decrease methane production up to 29 and 41%, respectively, without significantly compromising feed intake and nutrients digestibility. |
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