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Enteric methane emissions by young Brahman bulls grazing tropical pastures at different rainfall seasons in the Peruvian jungle.
Díaz-Céspedes, Medardo; Hernández-Guevara, José Eduard; Gómez, Carlos.
Afiliação
  • Díaz-Céspedes M; Universidad Nacional Agraria de La Selva, Carretera Central km. 1.21, Tingo María, Rupa Rupa, Leoncio Prado, Huánuco, 10131, Perú.
  • Hernández-Guevara JE; Universidad Nacional Agraria La Molina, Av. La Molina s/n, La Molina, Lima, 15024, Perú.
  • Gómez C; Universidad Nacional Agraria de La Selva, Carretera Central km. 1.21, Tingo María, Rupa Rupa, Leoncio Prado, Huánuco, 10131, Perú.
Trop Anim Health Prod ; 53(4): 421, 2021 Jul 31.
Article em En | MEDLINE | ID: mdl-34331133
The aim of this research was to measure enteric methane (CH4) emissions by young Brahman bulls grazing tropical pastures at different rainfall seasons in the Peruvian jungle. Fourteen 1.5-year-old, young bulls (280 kg ± 18 kg BW) were grazed on tropical grasses and legumes dominated by German grass [Echinochloa polystachya (Kunth) Hitch.] and minor proportion of Torourco grass [Paspalum conjugatum (P.J. Bergius) Roxb] and Leguminous Calopo (Calopogonium mucunoides Desv.) and Kudzú [Pueraria phaseoloides (Roxb.) Benth]. Enteric CH4 emission was measured by the sulfur hexafluoride (SF6) tracer-gas technique. Organic matter intake (OMI) was determined from organic matter digestibility (OMD) using a fecal protein crude index and fecal output estimated by the dosage of external markers. There was a difference in OMD between seasons (68 and 66% for the dry and rainy seasons, respectively; P < 0.0001). The OMI (6.7 and 7.4 kg/day) and CH4 (178.7 and 298 g/day) were higher (P < 0.05) in the dry season than in the rainy season, respectively. The yield of CH4 was lower (P < 0.0001) during rainy season (7.1%) than at the dry season (10.6%). The CH4 emission (g/day) was correlated with OMD (%) (r = 0.74, P < 0.0001). Enteric CH4 emissions of young bulls grazing mixtures of tropical pastures were significantly lower in animals grazing on the rainy-season, expressed either through unit of absolute emission, intake or as percentage of the GEI. Likewise, OMD of consumed pasture was the most important factor determining CH4 emission.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ração Animal / Metano Limite: Animals País/Região como assunto: America do sul / Peru Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2021 Tipo de documento: Article País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ração Animal / Metano Limite: Animals País/Região como assunto: America do sul / Peru Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2021 Tipo de documento: Article País de publicação: Estados Unidos