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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
13/08/2023 |
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Data da última atualização: |
13/08/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, C. S. da; LEÃO, J. M.; LAGE, C. F. A.; COELHO, S. G.; CAMPOS, M. M. |
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Afiliação: |
CAMILA S. DA SILVA; JULIANA M. LEÃO, The Saskatoon Colostrum Company; CAMILA F. A. LAGE, Cornell Cooperative Extension; SANDRA G. COELHO, Universidade Federal de Minas Gerais; MARIANA MAGALHAES CAMPOS, CNPGL. |
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Título: |
Residual feed intake as an efficiency metric for pre-weaning dairy calves: what do we know? |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Life, v. 13, 1727, 2023. |
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DOI: |
https://doi.org/10.3390/life13081727 |
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Idioma: |
Inglês |
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Conteúdo: |
Dairy cattle systems have targeted improvements in feed efficiency by selecting animals that can convert less feed into more products. Residual feed intake (RFI) has been the index of choice when selecting dairy cattle for feed efficiency. Nonetheless, RFI studies have focused on lactating cows, and the crucial importance of pre-weaning efficiency on farm profitability and cow productivity has been mostly neglected. This review discusses the current knowledge of how RFI divergence relates to nutrient metabolism in pre-weaning dairy calves, including the advantages and limitations of evaluating RFI in this phase. Existing literature indicates that nutrient utilization, energy metabolism, protein metabolism, vitamin metabolism, intestinal development, and hindgut bacterial populations may be implicated in RFI divergence between pre-weaning calves. Techniques developed to date to evaluate RFI in this phase are still evolving to better adapt to the unique characteristics of this phase, and more research is needed to fill in the gaps in our current understanding of early-life feed efficiency divergence in cattle. However, current results suggest great potential for selecting high-efficiency calves while in pre-weaning to accelerate the progress of genetic selection in dairy cattle. |
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Palavras-Chave: |
Desmame; Teste de eficiência. |
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Thesagro: |
Bezerro Leiteiro; Gado Leiteiro. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1155878/1/Residual-feed-intake-as-an-efficiency-metric.pdf
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Marc: |
LEADER 01963naa a2200229 a 4500
001 2155878
005 2023-08-13
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3390/life13081727$2DOI
100 1 $aSILVA, C. S. da
245 $aResidual feed intake as an efficiency metric for pre-weaning dairy calves$bwhat do we know?$h[electronic resource]
260 $c2023
520 $aDairy cattle systems have targeted improvements in feed efficiency by selecting animals that can convert less feed into more products. Residual feed intake (RFI) has been the index of choice when selecting dairy cattle for feed efficiency. Nonetheless, RFI studies have focused on lactating cows, and the crucial importance of pre-weaning efficiency on farm profitability and cow productivity has been mostly neglected. This review discusses the current knowledge of how RFI divergence relates to nutrient metabolism in pre-weaning dairy calves, including the advantages and limitations of evaluating RFI in this phase. Existing literature indicates that nutrient utilization, energy metabolism, protein metabolism, vitamin metabolism, intestinal development, and hindgut bacterial populations may be implicated in RFI divergence between pre-weaning calves. Techniques developed to date to evaluate RFI in this phase are still evolving to better adapt to the unique characteristics of this phase, and more research is needed to fill in the gaps in our current understanding of early-life feed efficiency divergence in cattle. However, current results suggest great potential for selecting high-efficiency calves while in pre-weaning to accelerate the progress of genetic selection in dairy cattle.
650 $aBezerro Leiteiro
650 $aGado Leiteiro
653 $aDesmame
653 $aTeste de eficiência
700 1 $aLEÃO, J. M.
700 1 $aLAGE, C. F. A.
700 1 $aCOELHO, S. G.
700 1 $aCAMPOS, M. M.
773 $tLife$gv. 13, 1727, 2023.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pantanal. Para informações adicionais entre em contato com cpap.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
28/06/2012 |
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Data da última atualização: |
25/02/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
GOMES, E. G.; ABREU, U. G. P. de; MELLO, J. C. C. B. de; CARVALHO, T. B. de; ZEN, S. de. |
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Afiliação: |
ELIANE GONCALVES GOMES, SGE; URBANO GOMES PINTO DE ABREU, CPAP; JOÃO CARLOS CORREIA BAPTISTA SOARES DE MELLO, FLUMINENSE FEDERAL UNIVERSITY; THIAGO BERNARDINO DE CARVALHO, CENTER FOR ADVANCED STUDIES ON APPLIED ECONOMICS; SÉRGIO DE ZEN, CENTER FOR ADVANCED STUDIES ON APPLIED ECONOMICS. |
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Título: |
Unitary input dea model to identify beef cattle production systems typologies. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Pesquisa operacional, v. 32, n.2 , p.389-406, 2012. |
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ISSN: |
0101-7438 |
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Idioma: |
Inglês |
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Conteúdo: |
The cow-calf beef production sector in Brazil has a wide variety of operating systems. This suggests the identification and the characterization of homogeneous regions of production, with consequent implementation of actions to achieve its sustainability. In this paper we attempted to measure the performance of 21 livestock modal production systems, in their cow-calf phase. We measured the performance of these systems, considering husbandry and production variables. The proposed approach is based on data envelopment analysis (DEA). We used unitary input DEA model, with apparent input orientation, together with the efficiency measurements generated by the inverted DEA frontier. We identified five modal production systems typologies, using the isoefficiency layers approach. The results showed that the knowledge and the processes management are the most important factors for improving the efficiency of beef cattle production systems. |
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Thesaurus NAL: |
beef cattle. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01485naa a2200193 a 4500
001 1927355
005 2013-02-25
008 2012 bl --- 0-- u #d
022 $a0101-7438
100 1 $aGOMES, E. G.
245 $aUnitary input dea model to identify beef cattle production systems typologies.
260 $c2012
520 $aThe cow-calf beef production sector in Brazil has a wide variety of operating systems. This suggests the identification and the characterization of homogeneous regions of production, with consequent implementation of actions to achieve its sustainability. In this paper we attempted to measure the performance of 21 livestock modal production systems, in their cow-calf phase. We measured the performance of these systems, considering husbandry and production variables. The proposed approach is based on data envelopment analysis (DEA). We used unitary input DEA model, with apparent input orientation, together with the efficiency measurements generated by the inverted DEA frontier. We identified five modal production systems typologies, using the isoefficiency layers approach. The results showed that the knowledge and the processes management are the most important factors for improving the efficiency of beef cattle production systems.
650 $abeef cattle
700 1 $aABREU, U. G. P. de
700 1 $aMELLO, J. C. C. B. de
700 1 $aCARVALHO, T. B. de
700 1 $aZEN, S. de
773 $tPesquisa operacional$gv. 32, n.2 , p.389-406, 2012.
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