Forage sources in total mixed rations early in life influence performance, metabolites, and behavior of dairy calves

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversity of Florida-
Autor(es): dc.creatorToledo, A. F.-
Autor(es): dc.creatorDantas, J. G.-
Autor(es): dc.creatorBarboza, R. D.F.-
Autor(es): dc.creatorTomaluski, C. R.-
Autor(es): dc.creatorOliveira, I. C.R.-
Autor(es): dc.creatorCarvalho, N. I.-
Autor(es): dc.creatorMarino, E. D.-
Autor(es): dc.creatorPolizel, D. M.-
Autor(es): dc.creatorMiller-Cushon, E. K.-
Autor(es): dc.creatorBittar, C. M.M.-
Data de aceite: dc.date.accessioned2025-08-21T21:10:10Z-
Data de disponibilização: dc.date.available2025-08-21T21:10:10Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-06-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3168/jds.2023-24138-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/305353-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/305353-
Descrição: dc.descriptionThe objective of this study was to evaluate effects of forage inclusion and sources on performance, metabolism, and feeding behavior of dairy calves. Forty-eight Holstein calves were blocked and randomly assigned to 1 of 4 dietary treatments according to sex and BW at 28 d of life to determine the effects of feeding forage sources (ensiled and dry), with different quality on performance, metabolites, and behavior. Treatments consisted of a no-forage coarsely ground starter (CON); or total mixed ration (TMR) containing 7.5% on a dry matter (DM) basis of Tifton hay of either medium quality (MH) or low quality (LH); or 10% on a DM basis of corn silage (CS). During the first 28 d of life, all calves received 3 L of whole milk twice daily, a commercial pelleted starter and no forage, and water ad libitum. After that, the solid diet was changed to the respective dietary treatments. Calves were gradually weaned from 52 to 56 d of age, and followed for 14 d postweaning. Individual solid feed and milk intakes were recorded daily, and BW and metabolic indicators of intermediate metabolism were recorded weekly. Behavior was recorded, and the analysis was conducted on wk 7 (preweaning) and 10 (postweaning). Solid feed intake increased at wk 7 and 8 when MH, LH, and CS were included in TMR; the same results were observed postweaning. The diets did not affect the average daily gain and BW, but the feed efficiency increased with the CON diet. The β-hydroxybutyrate concentration was greater in calves receiving TMR-containing forage than CON diet. Furthermore, calves supplemented with forage had a greater rumination time. In conclusion, all forage sources included in the TMR showed feed intake and behavior benefits, reinforcing the need for fiber from forage in pre- and postweaning diets.-
Descrição: dc.descriptionDepartment of Animal Science “Luiz de Queiroz” College of Agriculture (ESALQ) University of São Paulo, SP-
Descrição: dc.descriptionDepartment of Animal Production College of Technology and Agricultural Sciences São Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Animal Sciences University of Florida-
Descrição: dc.descriptionDepartment of Animal Production College of Technology and Agricultural Sciences São Paulo State University (UNESP)-
Formato: dc.format3601-3613-
Idioma: dc.languageen-
Relação: dc.relationJournal of Dairy Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjecteffectiveness-
Palavras-chave: dc.subjectfermented forage-
Palavras-chave: dc.subjectparticle size-
Palavras-chave: dc.subjecttotal mixed ration-
Título: dc.titleForage sources in total mixed rations early in life influence performance, metabolites, and behavior of dairy calves-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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