|
|
Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
13/09/2022 |
Data da última atualização: |
13/09/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SILVESTRE, T.; FERREIRA, A. L.; MACHADO, F. S.; CAMPOS, M. M.; TOMICH, T. R.; PEREIRA, L. G. R.; RODRIGUES, P. H. M.; MARCONDES, M. I. |
Afiliação: |
TAINA SILVESTRE, Universidade de São Paulo; ALEXANDRE LIMA FERREIRA, Universidade Federal de Minas Gerais; FERNANDA SAMARINI MACHADO, CNPGL; MARIANA MAGALHAES CAMPOS, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; PAULO HENRIQUE MAZZA RODRIGUES, Universidade de São Paulo; MARCOS INACIO MARCONDES, Washington State University. |
Título: |
Energy requirements of Holstein, Gyr, and Holstein x Gyr crossbred heifers using the respirometry technique. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Frontiers in Animal Science, v. 3, 919515, 2022. |
DOI: |
https://doi.org/10.3389/fanim.2022.919515 |
Idioma: |
Inglês |
Conteúdo: |
We aimed to determine the energy requirements for maintenance and gain of 18 prepubertal dairy heifers of three breed compositions (BC; Holstein, Gyr, and Holstein × Gyr). Diets were formulated for gains of 0, 400, and 800 g/day, corresponding to 1.0×, 1.5×, and 2.0× maintenance, respectively. Each dairy BC had six animals with an initial body weight (iBW) of 219.8 ± 32 kg, 215.8 ± 33 kg, and 228.3 ± 33 kg for Holstein, Gyr, and Holstein × Gyr, respectively. The experiment was designed as a completely randomized design in a factorial scheme 3 × 3 [three BC and three feeding levels (FL)]. Digestibility and metabolism assays were performed to determine energy losses through feces and urine. Heat production was determined using the continuous measurement of oxygen consumption, carbon dioxide production, and methane emissions in respiration chambers. Energy requirements for maintenance (NEm) were calculated based on the relationship between heat production (HP) and metabolizable energy intake (MEI). The efficiency of use of metabolizable energy for maintenance (km) was obtained from the ratio between NEm and metabolizable energy requirements for maintenance. The net energy requirements for growth (NEg) were estimated from the model RE = β0 × EBW0.75 × EBGβ1, where RE is the retained energy (Mcal/day), EBW is empty body weight (kg0.75), and EBG is the empty body gain (kg/day). The efficiency of use of metabolizable energy for gain (kg) was estimated as the slope of the regression between RE and MEI for gain. Gyr heifers presented NEm 15% lower (98 kcal/kg of BW0.75) than HG crossbred animals. Holstein and crossbred heifers had similar NEm, 102 and 112 kcal/kg of BW0.75, respectively. The km was 0.71, 0.74, and 0.75 for HG, Holstein, and Gyr, respectively. Net energy requirement for gain (NEg) did not differ across BC, and a single equation was fit for all BC: RE = 0.069 × BW0.75 × BGW0.852. A single kg of 0.65 was observed for all three BC. Breed composition affected the energy requirements for maintenance and the energy partition, and those differences should be considered when estimating requirements for Gyr, Holstein × Gyr crossbred, and Holstein heifers. MenosWe aimed to determine the energy requirements for maintenance and gain of 18 prepubertal dairy heifers of three breed compositions (BC; Holstein, Gyr, and Holstein × Gyr). Diets were formulated for gains of 0, 400, and 800 g/day, corresponding to 1.0×, 1.5×, and 2.0× maintenance, respectively. Each dairy BC had six animals with an initial body weight (iBW) of 219.8 ± 32 kg, 215.8 ± 33 kg, and 228.3 ± 33 kg for Holstein, Gyr, and Holstein × Gyr, respectively. The experiment was designed as a completely randomized design in a factorial scheme 3 × 3 [three BC and three feeding levels (FL)]. Digestibility and metabolism assays were performed to determine energy losses through feces and urine. Heat production was determined using the continuous measurement of oxygen consumption, carbon dioxide production, and methane emissions in respiration chambers. Energy requirements for maintenance (NEm) were calculated based on the relationship between heat production (HP) and metabolizable energy intake (MEI). The efficiency of use of metabolizable energy for maintenance (km) was obtained from the ratio between NEm and metabolizable energy requirements for maintenance. The net energy requirements for growth (NEg) were estimated from the model RE = β0 × EBW0.75 × EBGβ1, where RE is the retained energy (Mcal/day), EBW is empty body weight (kg0.75), and EBG is the empty body gain (kg/day). The efficiency of use of metabolizable energy for gain (kg) was estimated as the slope of the ... Mostrar Tudo |
Palavras-Chave: |
Bioenergetics; Breed composition; Indirect calorimetry; Maintenance. |
Thesagro: |
Bovino; Calorimetria; Gado Gir; Gado Holandês; Manutenção; Raça. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1146382/1/Energy-requirements-of-Holstein-Gyr-and-Holstein-x-Gyr-crossbred-heifers-using-the-respirometry-technique.pdf
|
Marc: |
LEADER 03195naa a2200337 a 4500 001 2146382 005 2022-09-13 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.3389/fanim.2022.919515$2DOI 100 1 $aSILVESTRE, T. 245 $aEnergy requirements of Holstein, Gyr, and Holstein x Gyr crossbred heifers using the respirometry technique.$h[electronic resource] 260 $c2022 520 $aWe aimed to determine the energy requirements for maintenance and gain of 18 prepubertal dairy heifers of three breed compositions (BC; Holstein, Gyr, and Holstein × Gyr). Diets were formulated for gains of 0, 400, and 800 g/day, corresponding to 1.0×, 1.5×, and 2.0× maintenance, respectively. Each dairy BC had six animals with an initial body weight (iBW) of 219.8 ± 32 kg, 215.8 ± 33 kg, and 228.3 ± 33 kg for Holstein, Gyr, and Holstein × Gyr, respectively. The experiment was designed as a completely randomized design in a factorial scheme 3 × 3 [three BC and three feeding levels (FL)]. Digestibility and metabolism assays were performed to determine energy losses through feces and urine. Heat production was determined using the continuous measurement of oxygen consumption, carbon dioxide production, and methane emissions in respiration chambers. Energy requirements for maintenance (NEm) were calculated based on the relationship between heat production (HP) and metabolizable energy intake (MEI). The efficiency of use of metabolizable energy for maintenance (km) was obtained from the ratio between NEm and metabolizable energy requirements for maintenance. The net energy requirements for growth (NEg) were estimated from the model RE = β0 × EBW0.75 × EBGβ1, where RE is the retained energy (Mcal/day), EBW is empty body weight (kg0.75), and EBG is the empty body gain (kg/day). The efficiency of use of metabolizable energy for gain (kg) was estimated as the slope of the regression between RE and MEI for gain. Gyr heifers presented NEm 15% lower (98 kcal/kg of BW0.75) than HG crossbred animals. Holstein and crossbred heifers had similar NEm, 102 and 112 kcal/kg of BW0.75, respectively. The km was 0.71, 0.74, and 0.75 for HG, Holstein, and Gyr, respectively. Net energy requirement for gain (NEg) did not differ across BC, and a single equation was fit for all BC: RE = 0.069 × BW0.75 × BGW0.852. A single kg of 0.65 was observed for all three BC. Breed composition affected the energy requirements for maintenance and the energy partition, and those differences should be considered when estimating requirements for Gyr, Holstein × Gyr crossbred, and Holstein heifers. 650 $aBovino 650 $aCalorimetria 650 $aGado Gir 650 $aGado Holandês 650 $aManutenção 650 $aRaça 653 $aBioenergetics 653 $aBreed composition 653 $aIndirect calorimetry 653 $aMaintenance 700 1 $aFERREIRA, A. L. 700 1 $aMACHADO, F. S. 700 1 $aCAMPOS, M. M. 700 1 $aTOMICH, T. R. 700 1 $aPEREIRA, L. G. R. 700 1 $aRODRIGUES, P. H. M. 700 1 $aMARCONDES, M. I. 773 $tFrontiers in Animal Science$gv. 3, 919515, 2022.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
26/09/2006 |
Data da última atualização: |
14/05/2008 |
Autoria: |
BATISTA, J. S. S.; MENNA, P.; BARCELLOS, F. G.; MENDES, I. C.; HUNGRIA, M. |
Título: |
Variabilidade de estirpes de Bradyrhizobium japonicum e B. elkanii após sete anos de introdução em um solo dos cerrados. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 27.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 11.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 9.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 6., 2006, Bonito, MS. A busca das raízes: anais. Dourados: Embrapa Agropecuária Oeste, 2006. |
Descrição Física: |
1 CD-ROM.
|
Série: |
(Embrapa Agropecuária Oeste. Documentos, 82). |
Idioma: |
Português |
Palavras-Chave: |
Variabilidade genética. |
Thesagro: |
Fixação de Nitrogênio; Inoculação. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00957naa a2200217 a 4500 001 1469615 005 2008-05-14 008 2006 bl uuuu u00u1 u #d 100 1 $aBATISTA, J. S. S. 245 $aVariabilidade de estirpes de Bradyrhizobium japonicum e B. elkanii após sete anos de introdução em um solo dos cerrados. 260 $c2006 300 $c1 CD-ROM. 490 $a(Embrapa Agropecuária Oeste. Documentos, 82). 650 $aFixação de Nitrogênio 650 $aInoculação 653 $aVariabilidade genética 700 1 $aMENNA, P. 700 1 $aBARCELLOS, F. G. 700 1 $aMENDES, I. C. 700 1 $aHUNGRIA, M. 773 $tIn: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 27.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 11.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 9.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 6., 2006, Bonito, MS. A busca das raízes: anais. Dourados: Embrapa Agropecuária Oeste, 2006.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Soja (CNPSO) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|