Urea supplementation in rumen and post-rumen for cattle fed a low-quality tropical forage

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorOliveira, Cristhiane V. R. de-
Autor(es): dc.creatorSilva, Tadeu E.-
Autor(es): dc.creatorBatista, Erick D.-
Autor(es): dc.creatorRennó, Luciana N.-
Autor(es): dc.creatorSilva, Fabyano F.-
Autor(es): dc.creatorCarvalho, Isabela P. C. de-
Autor(es): dc.creatorMartín-Tereso, Javier-
Autor(es): dc.creatorDetmann, Edenio-
Data de aceite: dc.date.accessioned2026-02-09T12:02:53Z-
Data de disponibilização: dc.date.available2026-02-09T12:02:53Z-
Data de envio: dc.date.issued2021-07-16-
Data de envio: dc.date.issued2021-07-16-
Data de envio: dc.date.issued2020-06-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br//handle/1/46768-
Fonte completa do material: dc.identifierhttps://doi.org/10.1017/S0007114520002251-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1153177-
Descrição: dc.descriptionWe evaluated the differences between the supplementation of urea in rumen and/or abomasum on forage digestion, N metabolism and urea kinetics in cattle fed a low-quality tropical forage. Five Nellore heifers were fitted with rumen and abomasum fistulas and assigned to a Latin square design. The treatments were control, continuous infusion of urea in the abomasum (AC), continuous infusion of urea in the rumen, a pulse dose of urea in the rumen every 12 h (PR) and a combination of PR and AC. The control exhibited the lowest (P < 0·10) faecal and urinary N losses, which were, overall, increased by supplementation. The highest urinary N losses (P < 0·10) were observed when urea was either totally or partially supplied as a ruminal pulse dose. The rumen N balance was negative for the control and when urea was totally supplied in the abomasum. The greatest microbial N production (P < 0·10) was obtained when urea was partially or totally supplied in the abomasum. Urea supplementation increased (P < 0·10) the amount of urea recycled to the gastrointestinal tract and the amount of urea-N returned to the ornithine cycle. The greatest (P < 0·10) amounts of urea-N used for anabolism were observed when urea was totally and continuously infused in the abomasum. The continuous abomasal infusion also resulted in the highest (P < 0·10) assimilation of microbial N from recycling. The continuous releasing of urea throughout day either in the rumen or abomasum is able to improve N accretion in the animal body, despite mechanism responsible for that being different.-
Idioma: dc.languageen-
Publicador: dc.publisherCambridge University Press-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceBritish Journal of Nutrition-
Palavras-chave: dc.subjectPost-ruminal supplementation-
Palavras-chave: dc.subjectGastrointestinal tract-
Palavras-chave: dc.subjectNeutral-detergent fibre-
Palavras-chave: dc.subjectNon-protein N-
Palavras-chave: dc.subjectOrganic matter-
Palavras-chave: dc.subjectUrea N entry rate-
Palavras-chave: dc.subjectVolatile fatty acids-
Palavras-chave: dc.subjectBovinos - Alimentação-
Palavras-chave: dc.subjectSuplementação alimentar-
Palavras-chave: dc.subjectUréia na suplementação de ruminantes-
Palavras-chave: dc.subjectTrato gastrointestinal-
Palavras-chave: dc.subjectFibra em detergente neutro-
Palavras-chave: dc.subjectMatéria orgânica-
Palavras-chave: dc.subjectÁcidos graxos voláteis-
Título: dc.titleUrea supplementation in rumen and post-rumen for cattle fed a low-quality tropical forage-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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