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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
12/04/2024 |
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Data da última atualização: |
12/04/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SACRAMENTO, J. P.; OLIVEIRA, A. S.; LEÃO, A. E.; FONSECA, A. P.; COELHO, S. G.; TOMICH, T. R.; MACHADO, F. S.; FERREIRA, A. L.; CAMPOS, M. M.; SILVI, R. R.; ROWNTREE, J. E.; RODRIGUES, J. R. P.; PEREIRA, L. G. R. |
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Afiliação: |
UNIVERSIDADE FEDERAL DE SÃO JOÃO DEL-REI; UNIVERSIDADE FEDERAL DO MATO GROSSO; UNIVERSIDADE FEDERAL DE MINAS GERAIS; UNIVERSIDADE FEDERAL DE MINAS GERAIS; UNIVERSIDADE FEDERAL DE MINAS GERAIS; THIERRY RIBEIRO TOMICH, CNPGL; FERNANDA SAMARINI MACHADO, CNPGL; MARIANA MAGALHAES CAMPOS, CNPGL; UNIVERSIDADE ESTADUAL DE SANTA CRUZ; MICHIGAN STATE UNIVERSITY; UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL. |
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Título: |
Energy requirement for primiparous Holstein × Gyr crossbred dairy cows. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Journal of Dairy Science, 2024. |
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DOI: |
https://doi.org/10.3168/jds.2023-24393 |
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Idioma: |
Inglês |
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Conteúdo: |
Our objective was to estimate the requirements of metabolizable energy (ME) and net energy for the maintenance (NEm) of lactating and dry cows, the efficiency of ME utilization for milk production (kl) and tissue gain (kg), and the use of body energy mobilization for milk production (kt) throughout the lactation of primiparous crossbred Holstein × Gyr cows, using open-circuit respiration chambers. Twenty-nine primiparous Holstein × Gyr crossbred cows with an initial BW averaging 563 ± 40.1 kg and 2.5 ± 0.09 years old were used throughout lactation and dry periods. The cows were kept non-pregnant throughout the study to eliminate possible confounding factors. Apparent digestibility assays, followed by calorimeter measurements, were performed 6 times throughout the lactation period. In the dry-off period, the cows were also evaluated but fed with restricted intake (DMI = 1.1% BW/d) to achieve heat production close to maintenance. After 21 d of diet adaptation, an apparent digestibility assay followed by calorimeter measurements was performed. Parameter estimates for lactation period were obtained by mixed models including lactation stage as repeated measures. For restricted feeding at dry-off and fasting period assays, the requirements were estimated by exponential regression. For whole lactation, the values of MEm and NEm were 0.588 and 0.395 MJ/BW0.75, respectively. The efficiencies kl kg kt were 0.672, 0.771, and 0.814, respectively. However, MEm and NEm were higher in early and mid-lactation than late, while kl was higher in early than other lactation stages. Dry and non-pregnant cows had MEm of 0.434 MJ/BW0.75 and NEm of 0.351 MJ/BW0.75 for maintenance level, and MEm of 0.396 MJ/BW0.75 and NEm of 0.345 MJ/BW0.75 for fasting metabolism level and efficiency of ME utilization for maintenance was 0.80. Our findings confirmed that F1 crossbred Holstein × Gyr dairy cows have differences in energy requirement and efficiency throughout the lactation stages, suggesting the use of different values in each stage. The estimated values of energy requirement for maintenance and efficiencies for primiparous lactating crossbred Holstein × Gyr were similar to those reported in the literature in specific studies and requirements systems. Keywords: efficiency, maintenance, metabolizable energy, net energy. MenosOur objective was to estimate the requirements of metabolizable energy (ME) and net energy for the maintenance (NEm) of lactating and dry cows, the efficiency of ME utilization for milk production (kl) and tissue gain (kg), and the use of body energy mobilization for milk production (kt) throughout the lactation of primiparous crossbred Holstein × Gyr cows, using open-circuit respiration chambers. Twenty-nine primiparous Holstein × Gyr crossbred cows with an initial BW averaging 563 ± 40.1 kg and 2.5 ± 0.09 years old were used throughout lactation and dry periods. The cows were kept non-pregnant throughout the study to eliminate possible confounding factors. Apparent digestibility assays, followed by calorimeter measurements, were performed 6 times throughout the lactation period. In the dry-off period, the cows were also evaluated but fed with restricted intake (DMI = 1.1% BW/d) to achieve heat production close to maintenance. After 21 d of diet adaptation, an apparent digestibility assay followed by calorimeter measurements was performed. Parameter estimates for lactation period were obtained by mixed models including lactation stage as repeated measures. For restricted feeding at dry-off and fasting period assays, the requirements were estimated by exponential regression. For whole lactation, the values of MEm and NEm were 0.588 and 0.395 MJ/BW0.75, respectively. The efficiencies kl kg kt were 0.672, 0.771, and 0.814, respectively. However, MEm and NEm were higher in earl... Mostrar Tudo |
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Thesagro: |
Gado Gir; Gado Holandês; Gado Leiteiro. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03213naa a2200313 a 4500
001 2163539
005 2024-04-12
008 2024 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3168/jds.2023-24393$2DOI
100 1 $aSACRAMENTO, J. P.
245 $aEnergy requirement for primiparous Holstein × Gyr crossbred dairy cows.$h[electronic resource]
260 $c2024
520 $aOur objective was to estimate the requirements of metabolizable energy (ME) and net energy for the maintenance (NEm) of lactating and dry cows, the efficiency of ME utilization for milk production (kl) and tissue gain (kg), and the use of body energy mobilization for milk production (kt) throughout the lactation of primiparous crossbred Holstein × Gyr cows, using open-circuit respiration chambers. Twenty-nine primiparous Holstein × Gyr crossbred cows with an initial BW averaging 563 ± 40.1 kg and 2.5 ± 0.09 years old were used throughout lactation and dry periods. The cows were kept non-pregnant throughout the study to eliminate possible confounding factors. Apparent digestibility assays, followed by calorimeter measurements, were performed 6 times throughout the lactation period. In the dry-off period, the cows were also evaluated but fed with restricted intake (DMI = 1.1% BW/d) to achieve heat production close to maintenance. After 21 d of diet adaptation, an apparent digestibility assay followed by calorimeter measurements was performed. Parameter estimates for lactation period were obtained by mixed models including lactation stage as repeated measures. For restricted feeding at dry-off and fasting period assays, the requirements were estimated by exponential regression. For whole lactation, the values of MEm and NEm were 0.588 and 0.395 MJ/BW0.75, respectively. The efficiencies kl kg kt were 0.672, 0.771, and 0.814, respectively. However, MEm and NEm were higher in early and mid-lactation than late, while kl was higher in early than other lactation stages. Dry and non-pregnant cows had MEm of 0.434 MJ/BW0.75 and NEm of 0.351 MJ/BW0.75 for maintenance level, and MEm of 0.396 MJ/BW0.75 and NEm of 0.345 MJ/BW0.75 for fasting metabolism level and efficiency of ME utilization for maintenance was 0.80. Our findings confirmed that F1 crossbred Holstein × Gyr dairy cows have differences in energy requirement and efficiency throughout the lactation stages, suggesting the use of different values in each stage. The estimated values of energy requirement for maintenance and efficiencies for primiparous lactating crossbred Holstein × Gyr were similar to those reported in the literature in specific studies and requirements systems. Keywords: efficiency, maintenance, metabolizable energy, net energy.
650 $aGado Gir
650 $aGado Holandês
650 $aGado Leiteiro
700 1 $aOLIVEIRA, A. S.
700 1 $aLEÃO, A. E.
700 1 $aFONSECA, A. P.
700 1 $aCOELHO, S. G.
700 1 $aTOMICH, T. R.
700 1 $aMACHADO, F. S.
700 1 $aFERREIRA, A. L.
700 1 $aCAMPOS, M. M.
700 1 $aSILVI, R. R.
700 1 $aROWNTREE, J. E.
700 1 $aRODRIGUES, J. R. P.
700 1 $aPEREIRA, L. G. R.
773 $tJournal of Dairy Science, 2024.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
04/05/2000 |
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Data da última atualização: |
25/02/2019 |
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Autoria: |
FARIAS, A. X. de; ROBBS, C. F.; BITTENCOURT, A. M.; ANDERSEN, P. M.; CORREA, T. B. S. |
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Afiliação: |
ANTONIO XAVIER DE FARIAS, CTAA; CHARLES FREDERICK ROBBS, CTAA; ANNA MARIA BITTENCOURT; PAUL MARIUS ANDERSEN, CTAA; TÂNIA BARRETTO SIMÕES CORRÊA, CTAA. |
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Título: |
Contaminação endógena por Aspergillus spp. em milho pós-colheita no Estado do Paraná. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 3, p. 617-621, mar. 2000. |
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Idioma: |
Português |
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Notas: |
Título em inglês: Endogenous Aspergillus spp. contamination of postharvest corn in Paraná State, Brazil. |
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Conteúdo: |
Sessenta amostras de milho pos-colheita foram avaliadas quanto a contaminacao fungica endogena e o potencial toxigeno de especies do genero Aspergillus e seus teleomorfos. Quarenta graos aparentemente sadios de cada amostra foram desinfetados em NaCIO e incubados em camara umida a 25+-1.C para exteriorizacao dos fungos, que posteriorment foram isolados em agar Czapek-Dox. Foram identificadas as especies Aspergillus flavus, A. parasiticus, Eurotium amstelodami e E. chevalieri. O potencial toxigeno dos fungos A. flavus e A. parasiticus foi avaliado, quanto a sintese de aflotoxinas em meio agar-coco. Especies do genero Eurotim foram avaliadas quanto a sintese de esterigmatocistina, nos meios agar-amendoim e trigo triturado. A porcentagem de graos contaminados variou entre 0 e 100%, prevalecendo os generos Aspergillus, Penicillium e Fusarium. A especie predominante foi a A. flavus (64%), seguida por E. amstelodami (19%), E. chevalieri (10%) e A. parasiticus (7%). A partir de 109 isolados de A. flavus, evidenciou-se que 73 isolados sintetizaram aflatoxinas B1 e B2, 20 sintetizaram B1, sete sintetizaram B1 e G1, tres sintetizaram B1, B2 e G1 e em seis nao foi detectada a sintese de aflatoxina. A sintese de esterigmatocistina pelas especies E. amstelodami e E. chevalieri nao foi detectada. |
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Palavras-Chave: |
Fungo toxígeno; Maize; Potencial toxígeno; Teleomorfo. |
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Thesagro: |
Aflatoxina; Fungo; Milho; Zea Mays. |
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Thesaurus NAL: |
Aflatoxins; Corn; Teleomorphs. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/17002/1/pab98_015.pdf
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Marc: |
LEADER 02247naa a2200313 a 4500
001 1101505
005 2019-02-25
008 2000 bl uuuu u00u1 u #d
100 1 $aFARIAS, A. X. de
245 $aContaminação endógena por Aspergillus spp. em milho pós-colheita no Estado do Paraná.
260 $c2000
500 $aTítulo em inglês: Endogenous Aspergillus spp. contamination of postharvest corn in Paraná State, Brazil.
520 $aSessenta amostras de milho pos-colheita foram avaliadas quanto a contaminacao fungica endogena e o potencial toxigeno de especies do genero Aspergillus e seus teleomorfos. Quarenta graos aparentemente sadios de cada amostra foram desinfetados em NaCIO e incubados em camara umida a 25+-1.C para exteriorizacao dos fungos, que posteriorment foram isolados em agar Czapek-Dox. Foram identificadas as especies Aspergillus flavus, A. parasiticus, Eurotium amstelodami e E. chevalieri. O potencial toxigeno dos fungos A. flavus e A. parasiticus foi avaliado, quanto a sintese de aflotoxinas em meio agar-coco. Especies do genero Eurotim foram avaliadas quanto a sintese de esterigmatocistina, nos meios agar-amendoim e trigo triturado. A porcentagem de graos contaminados variou entre 0 e 100%, prevalecendo os generos Aspergillus, Penicillium e Fusarium. A especie predominante foi a A. flavus (64%), seguida por E. amstelodami (19%), E. chevalieri (10%) e A. parasiticus (7%). A partir de 109 isolados de A. flavus, evidenciou-se que 73 isolados sintetizaram aflatoxinas B1 e B2, 20 sintetizaram B1, sete sintetizaram B1 e G1, tres sintetizaram B1, B2 e G1 e em seis nao foi detectada a sintese de aflatoxina. A sintese de esterigmatocistina pelas especies E. amstelodami e E. chevalieri nao foi detectada.
650 $aAflatoxins
650 $aCorn
650 $aTeleomorphs
650 $aAflatoxina
650 $aFungo
650 $aMilho
650 $aZea Mays
653 $aFungo toxígeno
653 $aMaize
653 $aPotencial toxígeno
653 $aTeleomorfo
700 1 $aROBBS, C. F.
700 1 $aBITTENCOURT, A. M.
700 1 $aANDERSEN, P. M.
700 1 $aCORREA, T. B. S.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 35, n. 3, p. 617-621, mar. 2000.
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