Slow-release urea in supplement fed to beef steers

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dc.contributor.authorGonçalves, Ana Paula
dc.contributor.authorNascimento, Carolina Fernanda Moysés do
dc.contributor.authorFerreira, Fernanda Altieri
dc.contributor.authorGomes, Rodrigo da Costa
dc.contributor.authorManella, Marcelo de Queiroz
dc.contributor.authorMarino, Carolina Tobias
dc.contributor.authorDemarchi, João José Assumpção de Abreu
dc.contributor.authorRodrigues, Paulo Henrique Mazza
dc.date.accessioned2024-05-14T19:57:41Z
dc.date.available2024-05-14T19:57:41Z
dc.date.issued2015
dc.description.abstractReplacing regular urea (RU) by slow-release urea (SRU) at two levels of non-protein nitrogen (NPN) in concentrate, offered with low-quality roughage, was evaluated in beef steers on dry matter intake (DMI), ruminal fermentation parameters, plasma urea nitrogen (PUN), total tract apparent digestibility of diets and in situ degradability of nitrogen sources. Eight ruminally cannulated steers were allocated into two 4x4 Latin squares, totalizing four treatments: 40 NPN/0 SRU: 40% of concentrate crude protein (CP) as NPN, resulting from 0% of SRU and 100% of RU; 40 NPN/50 SRU: 40% of concentrate CP as NPN, resulting from 50% of SRU and 50% of RU; 40 NPN/100 SRU: 40% of concentrate CP as NPN, resulting from 100% of SRU and 0% of RU; 80 NPN/100 SRU: 80% of concentrate CP as NPN, resulting from 100% of SRU and 0% of RU. Results showed that partial substitution of regular urea by slow-release urea did not alter dry matter intake, pattern of ruminal fermentation or plasma urea nitrogen concentrations and increased the total tract apparent digestibility of crude protein in steers diets. The increase in non-protein nitrogen content in crude protein of the concentrate could compromise feed intake and the efficiency of nutrient utilization in the steers fed complete diets based on low quality forage.
dc.identifier.doi10.1590/S1516-8913201502162
dc.identifier.issn1516-8913
dc.identifier.otherS1516-89132015000100022-scl
dc.identifier.urihttps://repositorio-aptaregional.agricultura.sp.gov.br/handle/123456789/1078
dc.relation.ispartofBrazilian Archives of Biology and Technology
dc.subjectControlled release
dc.subjectfeed intake
dc.subjectnon-protein nitrogen
dc.subjectshort chain fatty acids
dc.titleSlow-release urea in supplement fed to beef steers
dc.typeArtigos
oaire.citation.endPage30
oaire.citation.issue1
oaire.citation.startPage22
oaire.citation.volume58

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