Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Bioscience journal (Online) |
Texto Completo: | https://seer.ufu.br/index.php/biosciencejournal/article/view/54149 |
Resumo: | This study compared the dry matter intake (DMI) of Nellore heifers and bulls in the feedlot, predicted by the BR-Corte (2010 and 2016) and NRC (2000) nutritional systems. Hence, two experiments were conducted in a completely randomized design. The first one used 47 Nellore bulls, not castrated, with an average initial weight of 413 kg, and 19 months of age. The second experiment used 24 Nellore heifers with an average initial weight of 300 kg and 23 months of age. The accuracy and approximation of the DMI estimates by the nutritional systems were adjusted with the simple linear regression model and the root mean square error of prediction (RMSEP). The DMI was 8.06 kg day-1 for Nellore heifers and 11.54 kg day-1 for bulls, which are higher than the values predicted by the nutritional systems. The NRC (2000) and BR-Corte (2010 and 2016) underestimated DMI in 20.84, 20.09, and 19.35% for heifers and 28.07, 16.20, and 11.78% for bulls, respectively. It was concluded that the BR-Corte 2010 and 2016 were the most suitable models to estimate the DMI of Nellore heifers and bulls for higher precision and accuracy. |
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Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattleElectronic Feeding SystemsEquationsMeasurementNutrition.Agricultural SciencesThis study compared the dry matter intake (DMI) of Nellore heifers and bulls in the feedlot, predicted by the BR-Corte (2010 and 2016) and NRC (2000) nutritional systems. Hence, two experiments were conducted in a completely randomized design. The first one used 47 Nellore bulls, not castrated, with an average initial weight of 413 kg, and 19 months of age. The second experiment used 24 Nellore heifers with an average initial weight of 300 kg and 23 months of age. The accuracy and approximation of the DMI estimates by the nutritional systems were adjusted with the simple linear regression model and the root mean square error of prediction (RMSEP). The DMI was 8.06 kg day-1 for Nellore heifers and 11.54 kg day-1 for bulls, which are higher than the values predicted by the nutritional systems. The NRC (2000) and BR-Corte (2010 and 2016) underestimated DMI in 20.84, 20.09, and 19.35% for heifers and 28.07, 16.20, and 11.78% for bulls, respectively. It was concluded that the BR-Corte 2010 and 2016 were the most suitable models to estimate the DMI of Nellore heifers and bulls for higher precision and accuracy.Objetivou-se comparar o consumo de matéria seca (CMS) observado, por meio do uso do sistema eletrônico GrowSafe®, em novilhas e touros da raça Nelore em confinamento, com o predito pelos sistemas nutricionais BR-Corte (2010 e 2016) e NRC (2000). Para isso foram conduzidos dois experimentos em delineamento inteiramente casualizado de maio até dezembro de 2017. No primeiro, foram utilizados 47 touros da raça Nelore, não castrados com peso corporal inicial médio 413 kg e 19 meses de idade. No segundo estudo, foram utilizadas 24 novilhas da raça Nelore com peso corporal inicial médio de 300 kg e 23 meses de idade. A avaliação da exatidão e aproximação das estimativas do CMS pelos sistemas nutricionais foi ajustada pelo modelo de regressão linear simples e decomposição do quadrado médio dos erros de predição (QMEP). O CMS médio observado nas novilhas Nelore foi de 8,06 kg.dia-1 e nos touros 11,54 kg.dia-1, valores superiores aos preditos pelos sistemas nutricionais. Os valores preditos pelo NRC 2000 e BR-Corte 2010 e 2016 subestimaram o CMS em 20,84, 20,09 e 19,35% para novilhas e 28,07, 16,20 e 11,78% para touros, respectivamente. Concluiu-se, através do QMEP e sua decomposição, que o BR-Corte 2010 e 2016 foram os modelos mais adequados para estimar o CMS de novilhas e touros da raça Nelore pela maior precisão e acurácia.EDUFU2021-12-29info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.ufu.br/index.php/biosciencejournal/article/view/5414910.14393/BJ-v37n0a2021-54149Bioscience Journal ; Vol. 37 (2021): Continuous Publication; e37093Bioscience Journal ; v. 37 (2021): Continuous Publication; e370931981-3163reponame:Bioscience journal (Online)instname:Universidade Federal de Uberlândia (UFU)instacron:UFUenghttps://seer.ufu.br/index.php/biosciencejournal/article/view/54149/33021Brazil; Contemporary Copyright (c) 2021 Aline Maria Soares Ferreira, Simone Pedro da Silva, Carina Carina Ubirajara de Faria, Egleu Diomedes Marinho Mendes, Ester Ferreira Felipehttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccess Ferreira, Aline Maria SoaresPedro da Silva, Simonede Faria, Carina Carina Ubirajara Mendes, Egleu Diomedes MarinhoFelipe, Ester Ferreira 2022-02-12T14:34:56Zoai:ojs.www.seer.ufu.br:article/54149Revistahttps://seer.ufu.br/index.php/biosciencejournalPUBhttps://seer.ufu.br/index.php/biosciencejournal/oaibiosciencej@ufu.br||1981-31631516-3725opendoar:2022-02-12T14:34:56Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle |
title |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle |
spellingShingle |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle Ferreira, Aline Maria Soares Electronic Feeding Systems Equations Measurement Nutrition. Agricultural Sciences |
title_short |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle |
title_full |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle |
title_fullStr |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle |
title_full_unstemmed |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle |
title_sort |
Comparisons between intake values observed and predicted by nutritional systems for confined nellore cattle |
author |
Ferreira, Aline Maria Soares |
author_facet |
Ferreira, Aline Maria Soares Pedro da Silva, Simone de Faria, Carina Carina Ubirajara Mendes, Egleu Diomedes Marinho Felipe, Ester Ferreira |
author_role |
author |
author2 |
Pedro da Silva, Simone de Faria, Carina Carina Ubirajara Mendes, Egleu Diomedes Marinho Felipe, Ester Ferreira |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ferreira, Aline Maria Soares Pedro da Silva, Simone de Faria, Carina Carina Ubirajara Mendes, Egleu Diomedes Marinho Felipe, Ester Ferreira |
dc.subject.por.fl_str_mv |
Electronic Feeding Systems Equations Measurement Nutrition. Agricultural Sciences |
topic |
Electronic Feeding Systems Equations Measurement Nutrition. Agricultural Sciences |
description |
This study compared the dry matter intake (DMI) of Nellore heifers and bulls in the feedlot, predicted by the BR-Corte (2010 and 2016) and NRC (2000) nutritional systems. Hence, two experiments were conducted in a completely randomized design. The first one used 47 Nellore bulls, not castrated, with an average initial weight of 413 kg, and 19 months of age. The second experiment used 24 Nellore heifers with an average initial weight of 300 kg and 23 months of age. The accuracy and approximation of the DMI estimates by the nutritional systems were adjusted with the simple linear regression model and the root mean square error of prediction (RMSEP). The DMI was 8.06 kg day-1 for Nellore heifers and 11.54 kg day-1 for bulls, which are higher than the values predicted by the nutritional systems. The NRC (2000) and BR-Corte (2010 and 2016) underestimated DMI in 20.84, 20.09, and 19.35% for heifers and 28.07, 16.20, and 11.78% for bulls, respectively. It was concluded that the BR-Corte 2010 and 2016 were the most suitable models to estimate the DMI of Nellore heifers and bulls for higher precision and accuracy. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-29 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.ufu.br/index.php/biosciencejournal/article/view/54149 10.14393/BJ-v37n0a2021-54149 |
url |
https://seer.ufu.br/index.php/biosciencejournal/article/view/54149 |
identifier_str_mv |
10.14393/BJ-v37n0a2021-54149 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.ufu.br/index.php/biosciencejournal/article/view/54149/33021 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
Brazil; Contemporary |
dc.publisher.none.fl_str_mv |
EDUFU |
publisher.none.fl_str_mv |
EDUFU |
dc.source.none.fl_str_mv |
Bioscience Journal ; Vol. 37 (2021): Continuous Publication; e37093 Bioscience Journal ; v. 37 (2021): Continuous Publication; e37093 1981-3163 reponame:Bioscience journal (Online) instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Bioscience journal (Online) |
collection |
Bioscience journal (Online) |
repository.name.fl_str_mv |
Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
biosciencej@ufu.br|| |
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1797069082832404480 |