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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
14/02/2017 |
Data da última atualização: |
30/01/2023 |
Tipo da produção científica: |
Nota Técnica/Nota Científica |
Autoria: |
OSS, D. B.; MARCONDES, M. I.; MACHADO, F. S.; TOMICH, T. R.; CHIZZOTTI, M. L.; CAMPOS, M. M.; PEREIRA, L. G. R. |
Afiliação: |
D. B. OSS, UFV; CAPES; M. I. MARCONDES, UFV; FERNANDA SAMARINI MACHADO, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; M. L. CHIZZOTTI, UFV; MARIANA MAGALHAES CAMPOS, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL. |
Título: |
Technical note: Assessment of the oxygen pulse and heart rate method using respiration chambers and comparative slaughter for measuring heat production of cattle. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Journal of Dairy Science, v. 99, n. 11, p. 8885-8890, 2016. |
Idioma: |
Inglês |
Conteúdo: |
Abstract The objective of this study was to assess the oxygen pulse and heart rate (O2P-HR) technique using the respiration chamber (RC) and comparative slaughter (CS) methods for measuring the heat production (HP) of crossbred (Holstein × Gyr) yearling bulls. Twenty-four bulls were used. Six bulls were slaughtered at the beginning of the experiment as a reference group to estimate the initial empty body weight (BW) and energy content of the remaining animals. The remaining bulls were assigned to a completely randomized design with 3 levels of dry matter intake, with 6 replicates. The levels of dry matter intake were 1.2% of BW, 1.8% of BW and ad libitum, with target orts of 5%. The bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a dry matter basis. The HP (kcal/BW0.75) was measured using 3 techniques, first using O2P-HR, followed by the RC and CS methods. The HP did not differ among assessed techniques, averaging 162.7kcal/BW0.75. The intercepts of the linear regressions (mean ± SE) were 64.82±25.515 (H0: intercept=0; P=0.024), 33.77±13.418 (H0: intercept=0), and 50.02±27.495 (H0: intercept=0) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The slopes of the linear regressions were 0.59±0.153 (H0: slope=1), 0.88±0.081 (H0: slope=1), and 0.62±0.155 (H0: slope=1) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The coefficients of determination were 0.52, 0.90, and 0.52 for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The concordance correlation coefficients, 0.70 and 0.68, were moderate for O2P-HR versus RC and O2P-HR versus CS, respectively, but high, 0.90, for CS versus RC. The between-animal coefficient of variation was greater for the O2P-HR method (16.6%) compared with RC (7.7%) or CS (6.7%). We conclude that there was an agreement among the HP measurements detected using the assessed methods and that O2P-HR is able to predict HP in cattle with great accuracy but only moderate precision. Therefore, the O2P-HR method may have limitations in terms of assessing HP in low numbers of replications due to greater between-animal coefficient of variation than either the RC or CS methods. MenosAbstract The objective of this study was to assess the oxygen pulse and heart rate (O2P-HR) technique using the respiration chamber (RC) and comparative slaughter (CS) methods for measuring the heat production (HP) of crossbred (Holstein × Gyr) yearling bulls. Twenty-four bulls were used. Six bulls were slaughtered at the beginning of the experiment as a reference group to estimate the initial empty body weight (BW) and energy content of the remaining animals. The remaining bulls were assigned to a completely randomized design with 3 levels of dry matter intake, with 6 replicates. The levels of dry matter intake were 1.2% of BW, 1.8% of BW and ad libitum, with target orts of 5%. The bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a dry matter basis. The HP (kcal/BW0.75) was measured using 3 techniques, first using O2P-HR, followed by the RC and CS methods. The HP did not differ among assessed techniques, averaging 162.7kcal/BW0.75. The intercepts of the linear regressions (mean ± SE) were 64.82±25.515 (H0: intercept=0; P=0.024), 33.77±13.418 (H0: intercept=0), and 50.02±27.495 (H0: intercept=0) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The slopes of the linear regressions were 0.59±0.153 (H0: slope=1), 0.88±0.081 (H0: slope=1), and 0.62±0.155 (H0: slope=1) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The coefficients of determination were 0.52, 0.90, and 0.52 for O2P-HR versus RC, CS vers... Mostrar Tudo |
Palavras-Chave: |
Oxygen pulse. |
Thesaurus Nal: |
heart rate; heat production. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02973naa a2200229 a 4500 001 2063981 005 2023-01-30 008 2016 bl uuuu u00u1 u #d 100 1 $aOSS, D. B. 245 $aTechnical note$bAssessment of the oxygen pulse and heart rate method using respiration chambers and comparative slaughter for measuring heat production of cattle.$h[electronic resource] 260 $c2016 520 $aAbstract The objective of this study was to assess the oxygen pulse and heart rate (O2P-HR) technique using the respiration chamber (RC) and comparative slaughter (CS) methods for measuring the heat production (HP) of crossbred (Holstein × Gyr) yearling bulls. Twenty-four bulls were used. Six bulls were slaughtered at the beginning of the experiment as a reference group to estimate the initial empty body weight (BW) and energy content of the remaining animals. The remaining bulls were assigned to a completely randomized design with 3 levels of dry matter intake, with 6 replicates. The levels of dry matter intake were 1.2% of BW, 1.8% of BW and ad libitum, with target orts of 5%. The bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a dry matter basis. The HP (kcal/BW0.75) was measured using 3 techniques, first using O2P-HR, followed by the RC and CS methods. The HP did not differ among assessed techniques, averaging 162.7kcal/BW0.75. The intercepts of the linear regressions (mean ± SE) were 64.82±25.515 (H0: intercept=0; P=0.024), 33.77±13.418 (H0: intercept=0), and 50.02±27.495 (H0: intercept=0) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The slopes of the linear regressions were 0.59±0.153 (H0: slope=1), 0.88±0.081 (H0: slope=1), and 0.62±0.155 (H0: slope=1) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The coefficients of determination were 0.52, 0.90, and 0.52 for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The concordance correlation coefficients, 0.70 and 0.68, were moderate for O2P-HR versus RC and O2P-HR versus CS, respectively, but high, 0.90, for CS versus RC. The between-animal coefficient of variation was greater for the O2P-HR method (16.6%) compared with RC (7.7%) or CS (6.7%). We conclude that there was an agreement among the HP measurements detected using the assessed methods and that O2P-HR is able to predict HP in cattle with great accuracy but only moderate precision. Therefore, the O2P-HR method may have limitations in terms of assessing HP in low numbers of replications due to greater between-animal coefficient of variation than either the RC or CS methods. 650 $aheart rate 650 $aheat production 653 $aOxygen pulse 700 1 $aMARCONDES, M. I. 700 1 $aMACHADO, F. S. 700 1 $aTOMICH, T. R. 700 1 $aCHIZZOTTI, M. L. 700 1 $aCAMPOS, M. M. 700 1 $aPEREIRA, L. G. R. 773 $tJournal of Dairy Science$gv. 99, n. 11, p. 8885-8890, 2016.
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Embrapa Gado de Leite (CNPGL) |
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Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
29/04/2024 |
Data da última atualização: |
29/04/2024 |
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
Autoria: |
SILVEIRA, J. M.; MORAES, A. S.; MESQUITA, C. de M.; DELALIBERA, H. C.; POSSAMAI, E. J. |
Afiliação: |
JOSE MIGUEL SILVEIRA, CNPSO; ANDRE STEFFENS MORAES, CNPSO; CEZAR DE MELLO MESQUITA; HEVANDRO COLONHESE DELALIBERA, INSTITUTO DE DESENVOLVIMENTO RURAL DO PARANÁ-IAPAR-EMATER; EDIVAN JOSÉ POSSAMAI, INSTITUTO DE DESENVOLVIMENTO RURAL DO PARANÁ-IAPAR-EMATER. |
Título: |
Manejo integrado da colheita: determinação das perdas de grãos na colheita de soja usando o copo medidor da Embrapa. |
Ano de publicação: |
2024 |
Fonte/Imprenta: |
Londrina: Embrapa Soja, 2024. |
Páginas: |
36 p. |
Série: |
(Embrapa Soja. Comunicado Técnico, 112). |
Idioma: |
Português |
Thesagro: |
Medição; Perda Durante a Colheita; Soja. |
Thesaurus NAL: |
Harvesting; Soybeans. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1163983/1/Com-Tec-112-copo-m.pdf
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Marc: |
LEADER 00709nam a2200229 a 4500 001 2163983 005 2024-04-29 008 2024 bl uuuu u0uu1 u #d 100 1 $aSILVEIRA, J. M. 245 $aManejo integrado da colheita$bdeterminação das perdas de grãos na colheita de soja usando o copo medidor da Embrapa.$h[electronic resource] 260 $aLondrina: Embrapa Soja$c2024 300 $a36 p. 490 $a(Embrapa Soja. Comunicado Técnico, 112). 650 $aHarvesting 650 $aSoybeans 650 $aMedição 650 $aPerda Durante a Colheita 650 $aSoja 700 1 $aMORAES, A. S. 700 1 $aMESQUITA, C. de M. 700 1 $aDELALIBERA, H. C. 700 1 $aPOSSAMAI, E. J.
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