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Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
12/08/2021 |
Data da última atualização: |
12/08/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SGUIZZATO, A. L. L.; MARCONDES, M. I.; DIJKSTRA, J.; VALADARES FILHO, S. de C.; CAMPOS, M. M.; MACHADO, F. S.; SILVA, B. C.; ROTTA, P. P. |
Afiliação: |
ANNA LUIZA LACERDA SGUIZZATO, Universidade Federal de Viçosa; MARCOS INÁCIO MARCONDES, Universidade Federal de Viçosa; JAN DIJKSTRAI, Wageningen University; SEBASTIÃO DE CAMPOS VALADARES FILHO, Universidade Federal de Viçosa; MARIANA MAGALHAES CAMPOS, CNPGL; FERNANDA SAMARINI MACHADO, CNPGL; BRENO CASTRO SILVA, Universidade Federal de Viçosa; POLYANA PIZZI ROTTA, Universidade Federal de Viçosa. |
Título: |
Energy requirements for pregnant dairy cows. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
PLoS One, v. 15, n. 7, e0235619, 2020. |
DOI: |
https://doi.org/ 10.1371/journal.pone.0235619 |
Idioma: |
Inglês |
Conteúdo: |
This study aimed to estimate energy requirements of pregnant Holstein × Gyr cows. Different planes of nutrition were established by two feeding regimens: ad libitum or maintenance. Sixty-two nonlactating cows with average body weight of 480 ± 10.1 kg and an age of 5 ± 0.5 years were used. Cows were divided into three groups: pregnant (n = 44), non-pregnant (n=12), and baseline reference (n = 6). The 56 pregnant and non-pregnant cows were randomly allocated into a feeding regimen: ad libitum or maintenance. To evaluate the effects of days of pregnancy, pregnant and non-pregnant animals were slaughtered at 140, 200, 240, and 270 days of pregnancy. Energy requirements for maintenance differed between pregnant and non-pregnant cows, thus two equations were developed. Net energy and metabolizable energy requirements for maintenance of non-pregnant cows were 82 kcal/kg empty body weight0.75/day and 132 kcal/kg empty body weight0.75/day, respectively. The efficiency of use of metabolizable energy for maintenance of non-pregnant cows was 62.4%. Net energy and metabolizable energy for maintenance of pregnant cows were 86 kcal/kg empty body weight0.75/day and 137 kcal/kg empty body weight0.75/day, respectively. Efficiency of use of metabolizable energy for maintenance of pregnant cows was 62.5%. The efficiency of use of metabolizable energy for gain was 41.9%. The efficiency of use of metabolizable energy for pregnancy was 14.1%. Furthermore, net energy requirement for pregnancy was different from zero from day 70 of pregnancy onwards. In conclusion, net energy and metabolizable energy requirements for maintenance of non-pregnant cows are different from pregnant cows. Furthermore, we believe that the proposed non-linear equations to estimate net energy requirements for pregnancy are more adequate than current NRC equation, and should be recommended for Holstein × Gyr cows. MenosThis study aimed to estimate energy requirements of pregnant Holstein × Gyr cows. Different planes of nutrition were established by two feeding regimens: ad libitum or maintenance. Sixty-two nonlactating cows with average body weight of 480 ± 10.1 kg and an age of 5 ± 0.5 years were used. Cows were divided into three groups: pregnant (n = 44), non-pregnant (n=12), and baseline reference (n = 6). The 56 pregnant and non-pregnant cows were randomly allocated into a feeding regimen: ad libitum or maintenance. To evaluate the effects of days of pregnancy, pregnant and non-pregnant animals were slaughtered at 140, 200, 240, and 270 days of pregnancy. Energy requirements for maintenance differed between pregnant and non-pregnant cows, thus two equations were developed. Net energy and metabolizable energy requirements for maintenance of non-pregnant cows were 82 kcal/kg empty body weight0.75/day and 132 kcal/kg empty body weight0.75/day, respectively. The efficiency of use of metabolizable energy for maintenance of non-pregnant cows was 62.4%. Net energy and metabolizable energy for maintenance of pregnant cows were 86 kcal/kg empty body weight0.75/day and 137 kcal/kg empty body weight0.75/day, respectively. Efficiency of use of metabolizable energy for maintenance of pregnant cows was 62.5%. The efficiency of use of metabolizable energy for gain was 41.9%. The efficiency of use of metabolizable energy for pregnancy was 14.1%. Furthermore, net energy requirement for pregnancy was d... Mostrar Tudo |
Thesagro: |
Gado Leiteiro. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/225095/1/Energy-requirements.pdf
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Marc: |
LEADER 02554naa a2200229 a 4500 001 2133488 005 2021-08-12 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/ 10.1371/journal.pone.0235619$2DOI 100 1 $aSGUIZZATO, A. L. L. 245 $aEnergy requirements for pregnant dairy cows.$h[electronic resource] 260 $c2020 520 $aThis study aimed to estimate energy requirements of pregnant Holstein × Gyr cows. Different planes of nutrition were established by two feeding regimens: ad libitum or maintenance. Sixty-two nonlactating cows with average body weight of 480 ± 10.1 kg and an age of 5 ± 0.5 years were used. Cows were divided into three groups: pregnant (n = 44), non-pregnant (n=12), and baseline reference (n = 6). The 56 pregnant and non-pregnant cows were randomly allocated into a feeding regimen: ad libitum or maintenance. To evaluate the effects of days of pregnancy, pregnant and non-pregnant animals were slaughtered at 140, 200, 240, and 270 days of pregnancy. Energy requirements for maintenance differed between pregnant and non-pregnant cows, thus two equations were developed. Net energy and metabolizable energy requirements for maintenance of non-pregnant cows were 82 kcal/kg empty body weight0.75/day and 132 kcal/kg empty body weight0.75/day, respectively. The efficiency of use of metabolizable energy for maintenance of non-pregnant cows was 62.4%. Net energy and metabolizable energy for maintenance of pregnant cows were 86 kcal/kg empty body weight0.75/day and 137 kcal/kg empty body weight0.75/day, respectively. Efficiency of use of metabolizable energy for maintenance of pregnant cows was 62.5%. The efficiency of use of metabolizable energy for gain was 41.9%. The efficiency of use of metabolizable energy for pregnancy was 14.1%. Furthermore, net energy requirement for pregnancy was different from zero from day 70 of pregnancy onwards. In conclusion, net energy and metabolizable energy requirements for maintenance of non-pregnant cows are different from pregnant cows. Furthermore, we believe that the proposed non-linear equations to estimate net energy requirements for pregnancy are more adequate than current NRC equation, and should be recommended for Holstein × Gyr cows. 650 $aGado Leiteiro 700 1 $aMARCONDES, M. I. 700 1 $aDIJKSTRA, J. 700 1 $aVALADARES FILHO, S. de C. 700 1 $aCAMPOS, M. M. 700 1 $aMACHADO, F. S. 700 1 $aSILVA, B. C. 700 1 $aROTTA, P. P. 773 $tPLoS One$gv. 15, n. 7, e0235619, 2020.
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
26/12/2017 |
Data da última atualização: |
09/04/2024 |
Tipo da produção científica: |
Artigo de Divulgação na Mídia |
Autoria: |
CARVALHO, G. R.; ROCHA, D. T. da; RESENDE, J. C. de; LEITE, J. L. B.; STOCK, L. A.; HOTT, M. C.; ANDRADE, R. G.; TEIXEIRA, S. R.; MOTA, J.; TOSTES, V.; MACEDO, V. |
Afiliação: |
GLAUCO RODRIGUES CARVALHO, CNPGL; DENIS TEIXEIRA DA ROCHA, CNPGL; JOAO CESAR DE RESENDE, CNPGL; JOSE LUIZ BELLINI LEITE, CNPGL; LORILDO ALDO STOCK, CNPGL; MARCOS CICARINI HOTT, CNPGL; RICARDO GUIMARAES ANDRADE, CNPGL; SERGIO RUSTICHELLI TEIXEIRA, CNPGL; Juliana Mota, UFJF; Vinicius Tostes, UFJF; Vinícius Macedo, UFJF. |
Título: |
Leite e derivados: agosto/2017. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Intelactus, ago. 2017. |
Idioma: |
Português |
Palavras-Chave: |
Exportador de lácteos; Leite em pó intergral; UHT. |
Categoria do assunto: |
E Economia e Indústria Agrícola |
Marc: |
LEADER 00665nam a2200253 a 4500 001 2083510 005 2024-04-09 008 2017 bl uuuu u00u1 u #d 100 1 $aCARVALHO, G. R. 245 $aLeite e derivados$bagosto/2017.$h[electronic resource] 260 $aIntelactus, ago. 2017.$c2017 653 $aExportador de lácteos 653 $aLeite em pó intergral 653 $aUHT 700 1 $aROCHA, D. T. da 700 1 $aRESENDE, J. C. de 700 1 $aLEITE, J. L. B. 700 1 $aSTOCK, L. A. 700 1 $aHOTT, M. C. 700 1 $aANDRADE, R. G. 700 1 $aTEIXEIRA, S. R. 700 1 $aMOTA, J. 700 1 $aTOSTES, V. 700 1 $aMACEDO, V.
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