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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/67728
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dc.creatorPedro Henrique de Araújo Carvalhopt_BR
dc.creatorEloisa de Oliveira Simões Salibapt_BR
dc.creatorLucio Carlos Gonçalvespt_BR
dc.creatorIran Borgespt_BR
dc.creatorHelena Ferreira Lagept_BR
dc.creatorRodrigo Libério Araújo Palhanopt_BR
dc.creatorDiogo Gonzaga Jaimept_BR
dc.creatorAna Luiza Costa Cruz Borgespt_BR
dc.creatorRicardo Reis e Silvapt_BR
dc.creatorJosé Reinaldo Mendes Ruaspt_BR
dc.creatorAntônio Último de Carvalhopt_BR
dc.date.accessioned2024-04-25T19:26:58Z-
dc.date.available2024-04-25T19:26:58Z-
dc.date.issued2017-09-27-
dc.citation.volume1pt_BR
dc.citation.issue1pt_BR
dc.citation.spage1pt_BR
dc.citation.epage4pt_BR
dc.identifier.doihttp://dx.doi.org/10.16966/2576-6457.102pt_BR
dc.identifier.issn2576-6457pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/67728-
dc.description.resumoThis work aimed to measure methane emission by the most frequently used cattle for milk production in Brazil, Gyr and F1 Holstein x Gyr heifers feeding Tifton 85 (cynodont spp.) hay. Methane production was measured by a respirometric technique in six F1 Holstein x Gyr and six Gyr heifers fed Tifton 85 hay (Cynodon spp.) in a tie stall system consuming. After 21 adaptation days on feeding, heifers weighed 450kg and an apparent digestibility assay was performed. Feed intake and faecal production were measured for five days by total collection. Animals were housed for 24 hours in the respirometric chamber (open circuit type) receiving the experimental diet to quantify methane emission. Although dry matter (DM) intake was higher for crossbred heifers, nutrients digestibility was similar between breeds. Related to diet characteristics methane production was similar between genetic groups, with average values of 26.4 L methane/kg dry matter intake (L/kg DM), 43.2 L/kg digestible dry matter, 35.716 L/kg neutral detergent fiber, 57.3 L/kg digestible neutral detergent fiber, 29.5 L/kg organic matter and 45 L/kg digestible organic matter. Daily Methane production of crossbred heifers was higher than Gyr (173.76 versus136.77 L/d), due to higher DM intake of these animals. More productive animals may produce more methane per day because of the higher consumption of DM, so methane production data should be analyzed by relative and not absolute numbers.pt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentVET - DEPARTAMENTO DE ZOOTECNIApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofJournal of Animal Science and Researchpt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectheiferspt_BR
dc.subjectenergy metabolismpt_BR
dc.subject.otherGado Leiteiropt_BR
dc.subject.otherMetanopt_BR
dc.subject.otherRespiração - Mediçãopt_BR
dc.subject.otherCalorimetriapt_BR
dc.subject.otherRuminantept_BR
dc.titleMethane production by two breeds of cattle in tropical conditionspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://sciforschenonline.org/journals/animal-science-research/JASR-1-102.phppt_BR
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