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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
22/10/2008 |
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Data da última atualização: |
10/05/2018 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
CARVALHO, A. C. A. de; COUTO, H. T. Z. do; MOCHIUTTI, S. |
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Afiliação: |
ANTONIO CLAUDIO ALMEIDA DE CARVALHO, CPAF-AP; SILAS MOCHIUTTI, CPAF-AP. |
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Título: |
Análise estatística de um sistema agroflorestal através do índice de produção equivalente. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO SISTEMAS AGROFLORESTAIS, 4., 2002, Ilhéus. Anais... Ilhéus: CEPLAC-CEPEC, 2002. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
As interações biológicas, econômicas e ambientais que ocorrem entre as culturas componentes de um sistema agroflorestal) (SAF, implicam em respostas diferenciadas das respectivas culturas, conforme os arranjos aos quais as mesmas estejam submetidas. Num ensaio de avaliação de S SAF' , cada parcela apresenta mais de uma variável a ser estudada e portanto, os dados apresentam-se de forma multidimensional. Assim sedo, a forma mais apropriada para análise desses sistemas é através do uso das técnicas da estatísticas multivariadas. Não obstante, o tipo de analise estatística mais freqüentemente realizado nos sistemas consorciados é através da transformação do problema multivariado em um problema univariado através da obtenção de uma única variável como função resposta das observações das culturas componentes e, a partir da mesma, aplicam-se os testes estatísticos comumente empregados na análise de dados agronômicos. |
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Thesagro: |
Estatística Agrícola; Sistema de Cultivo. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/63700/1/AP-2002-analise-estatistica-sistema-agroflorestal.pdf
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Marc: |
LEADER 01532nam a2200169 a 4500
001 1352978
005 2018-05-10
008 2002 bl uuuu u00u1 u #d
100 1 $aCARVALHO, A. C. A. de
245 $aAnálise estatística de um sistema agroflorestal através do índice de produção equivalente.
260 $aIn: CONGRESSO BRASILEIRO SISTEMAS AGROFLORESTAIS, 4., 2002, Ilhéus. Anais... Ilhéus: CEPLAC-CEPEC$c2002
300 $c1 CD-ROM.
520 $aAs interações biológicas, econômicas e ambientais que ocorrem entre as culturas componentes de um sistema agroflorestal) (SAF, implicam em respostas diferenciadas das respectivas culturas, conforme os arranjos aos quais as mesmas estejam submetidas. Num ensaio de avaliação de S SAF' , cada parcela apresenta mais de uma variável a ser estudada e portanto, os dados apresentam-se de forma multidimensional. Assim sedo, a forma mais apropriada para análise desses sistemas é através do uso das técnicas da estatísticas multivariadas. Não obstante, o tipo de analise estatística mais freqüentemente realizado nos sistemas consorciados é através da transformação do problema multivariado em um problema univariado através da obtenção de uma única variável como função resposta das observações das culturas componentes e, a partir da mesma, aplicam-se os testes estatísticos comumente empregados na análise de dados agronômicos.
650 $aEstatística Agrícola
650 $aSistema de Cultivo
700 1 $aCOUTO, H. T. Z. do
700 1 $aMOCHIUTTI, S.
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Embrapa Amapá (CPAF-AP) |
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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. |
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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Circulação/Nível: |
A - 1 |
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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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