Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.

MORENZ, M. J. F.; SILVA, J. F. C. DA; AROEIRA, L. J. M.; DERESZ, F.; VASQUEZ, H. M.; LOPES, F. C. F.; PACIULLO, D. S. C.; TEDESCHI, L. O.; MIRTON JOSE FROTA MORENZ, CNPGL; JOSÉ FERNANDO COELHO DA SILVA, UENF; LUIZ JANUÁRIO MAGALHÃES AROEIRA, APOSENTADO EMBRAPA; FERMINO DERESZ, CNPGL; HERNAN MALDONADO VASQUEZ, UENF; FERNANDO CESAR FERRAZ LOPES, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; LUIS ORLINDO TEDESCHI, UNIVERSITY TEXAS.

Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.

The Cornel Net Carbohydrate and Protein System model version 5.0 was assessed as for its prediction of dry matter intake and milk production of grazing lactating Holstein × Zebu cows. Eight lactating cows grazing elephant grass (Pennisetum purpureum, Schum., cv. Napier) were used in two experiments of 30 days each. The experimental design was of randomized blocks (subplots). Dry matter intake was estimated using the chromium oxide and in vitro dry matter digestibility techniques. The estimated dry matter intake was compared with the values predicted by the model. Extrusa samples of the elephant grass pasture were obtained from a cow with esophageal fistula during nine days in each experimental period. Carbohydrate and nitrogenous fractions were analyzed and the degradation rate of carbohydrate was estimated by the gas production technique. The inputs referring to the animals (body weight, age, milk production, milk composition and breed type), to the environment (temperature, relative humidity of air and management condition) and to feeds chemical composition in each experimental period were inserted in the model. The model was accurate on the prediction of dry matter intake, considering that the mean values obtained by the chromium oxide technique and predicted by model (2.45 and 2.46% of body weight, respectively) did not differ significantly from each other. However, the model underestimated the observed milk production in 62.4%, where the metabolizable energy was the first limiting. These results demonstrate the need for studies that provide the development of a database for tropical foods (chemical composition and dynamics of rumen fermentation) and fitting of the model to the tropical conditions, for its appropriate application in formulation of diets and supplements in these regions.

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Main Authors:	MORENZ, M. J. F., SILVA, J. F. C. DA, AROEIRA, L. J. M., DERESZ, F., VASQUEZ, H. M., LOPES, F. C. F., PACIULLO, D. S. C., TEDESCHI, L. O.
Other Authors:	MIRTON JOSE FROTA MORENZ, CNPGL; JOSÉ FERNANDO COELHO DA SILVA, UENF; LUIZ JANUÁRIO MAGALHÃES AROEIRA, APOSENTADO EMBRAPA; FERMINO DERESZ, CNPGL; HERNAN MALDONADO VASQUEZ, UENF; FERNANDO CESAR FERRAZ LOPES, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; LUIS ORLINDO TEDESCHI, UNIVERSITY TEXAS.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	Revista Brasileira de Zootecnia, v. 41, n. 2, p. 398-406, 2012. 2012-12-12
Subjects:	Cromo oxido, Vacas lactantes, Capim Elefante, Rotação de Cultura,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/942167 https://doi.org/10.1590/S1516-35982012000200024
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spelling	dig-alice-doc-9421672023-01-23T18:01:38Z Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows. MORENZ, M. J. F. SILVA, J. F. C. DA AROEIRA, L. J. M. DERESZ, F. VASQUEZ, H. M. LOPES, F. C. F. PACIULLO, D. S. C. TEDESCHI, L. O. MIRTON JOSE FROTA MORENZ, CNPGL; JOSÉ FERNANDO COELHO DA SILVA, UENF; LUIZ JANUÁRIO MAGALHÃES AROEIRA, APOSENTADO EMBRAPA; FERMINO DERESZ, CNPGL; HERNAN MALDONADO VASQUEZ, UENF; FERNANDO CESAR FERRAZ LOPES, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; LUIS ORLINDO TEDESCHI, UNIVERSITY TEXAS. Cromo oxido Vacas lactantes Capim Elefante Rotação de Cultura The Cornel Net Carbohydrate and Protein System model version 5.0 was assessed as for its prediction of dry matter intake and milk production of grazing lactating Holstein × Zebu cows. Eight lactating cows grazing elephant grass (Pennisetum purpureum, Schum., cv. Napier) were used in two experiments of 30 days each. The experimental design was of randomized blocks (subplots). Dry matter intake was estimated using the chromium oxide and in vitro dry matter digestibility techniques. The estimated dry matter intake was compared with the values predicted by the model. Extrusa samples of the elephant grass pasture were obtained from a cow with esophageal fistula during nine days in each experimental period. Carbohydrate and nitrogenous fractions were analyzed and the degradation rate of carbohydrate was estimated by the gas production technique. The inputs referring to the animals (body weight, age, milk production, milk composition and breed type), to the environment (temperature, relative humidity of air and management condition) and to feeds chemical composition in each experimental period were inserted in the model. The model was accurate on the prediction of dry matter intake, considering that the mean values obtained by the chromium oxide technique and predicted by model (2.45 and 2.46% of body weight, respectively) did not differ significantly from each other. However, the model underestimated the observed milk production in 62.4%, where the metabolizable energy was the first limiting. These results demonstrate the need for studies that provide the development of a database for tropical foods (chemical composition and dynamics of rumen fermentation) and fitting of the model to the tropical conditions, for its appropriate application in formulation of diets and supplements in these regions. 2023-01-23T18:01:38Z 2023-01-23T18:01:38Z 2012-12-12 2012 Artigo de periódico http://www.alice.cnptia.embrapa.br/alice/handle/doc/942167 https://doi.org/10.1590/S1516-35982012000200024 Ingles en openAccess Revista Brasileira de Zootecnia, v. 41, n. 2, p. 398-406, 2012.
institution	EMBRAPA
collection	DSpace
country	Brasil
countrycode	BR
component	Bibliográfico
access	En linea
databasecode	dig-alice
tag	biblioteca
region	America del Sur
libraryname	Sistema de bibliotecas de EMBRAPA
language	Ingles English
topic	Cromo oxido Vacas lactantes Capim Elefante Rotação de Cultura Cromo oxido Vacas lactantes Capim Elefante Rotação de Cultura
spellingShingle	Cromo oxido Vacas lactantes Capim Elefante Rotação de Cultura Cromo oxido Vacas lactantes Capim Elefante Rotação de Cultura MORENZ, M. J. F. SILVA, J. F. C. DA AROEIRA, L. J. M. DERESZ, F. VASQUEZ, H. M. LOPES, F. C. F. PACIULLO, D. S. C. TEDESCHI, L. O. Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.
description	The Cornel Net Carbohydrate and Protein System model version 5.0 was assessed as for its prediction of dry matter intake and milk production of grazing lactating Holstein × Zebu cows. Eight lactating cows grazing elephant grass (Pennisetum purpureum, Schum., cv. Napier) were used in two experiments of 30 days each. The experimental design was of randomized blocks (subplots). Dry matter intake was estimated using the chromium oxide and in vitro dry matter digestibility techniques. The estimated dry matter intake was compared with the values predicted by the model. Extrusa samples of the elephant grass pasture were obtained from a cow with esophageal fistula during nine days in each experimental period. Carbohydrate and nitrogenous fractions were analyzed and the degradation rate of carbohydrate was estimated by the gas production technique. The inputs referring to the animals (body weight, age, milk production, milk composition and breed type), to the environment (temperature, relative humidity of air and management condition) and to feeds chemical composition in each experimental period were inserted in the model. The model was accurate on the prediction of dry matter intake, considering that the mean values obtained by the chromium oxide technique and predicted by model (2.45 and 2.46% of body weight, respectively) did not differ significantly from each other. However, the model underestimated the observed milk production in 62.4%, where the metabolizable energy was the first limiting. These results demonstrate the need for studies that provide the development of a database for tropical foods (chemical composition and dynamics of rumen fermentation) and fitting of the model to the tropical conditions, for its appropriate application in formulation of diets and supplements in these regions.
author2	MIRTON JOSE FROTA MORENZ, CNPGL; JOSÉ FERNANDO COELHO DA SILVA, UENF; LUIZ JANUÁRIO MAGALHÃES AROEIRA, APOSENTADO EMBRAPA; FERMINO DERESZ, CNPGL; HERNAN MALDONADO VASQUEZ, UENF; FERNANDO CESAR FERRAZ LOPES, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; LUIS ORLINDO TEDESCHI, UNIVERSITY TEXAS.
author_facet	MIRTON JOSE FROTA MORENZ, CNPGL; JOSÉ FERNANDO COELHO DA SILVA, UENF; LUIZ JANUÁRIO MAGALHÃES AROEIRA, APOSENTADO EMBRAPA; FERMINO DERESZ, CNPGL; HERNAN MALDONADO VASQUEZ, UENF; FERNANDO CESAR FERRAZ LOPES, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; LUIS ORLINDO TEDESCHI, UNIVERSITY TEXAS. MORENZ, M. J. F. SILVA, J. F. C. DA AROEIRA, L. J. M. DERESZ, F. VASQUEZ, H. M. LOPES, F. C. F. PACIULLO, D. S. C. TEDESCHI, L. O.
format	Artigo de periódico
topic_facet	Cromo oxido Vacas lactantes Capim Elefante Rotação de Cultura
author	MORENZ, M. J. F. SILVA, J. F. C. DA AROEIRA, L. J. M. DERESZ, F. VASQUEZ, H. M. LOPES, F. C. F. PACIULLO, D. S. C. TEDESCHI, L. O.
author_sort	MORENZ, M. J. F.
title	Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.
title_short	Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.
title_full	Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.
title_fullStr	Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.
title_full_unstemmed	Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.
title_sort	evaluation of the cornell net carbohydrate and protein system model on the prediction of dry matter intake and milk production of grazing crossbred cows.
publisher	Revista Brasileira de Zootecnia, v. 41, n. 2, p. 398-406, 2012.
publishDate	2012-12-12
url	http://www.alice.cnptia.embrapa.br/alice/handle/doc/942167 https://doi.org/10.1590/S1516-35982012000200024
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Evaluation of the Cornell Net Carbohydrate and Protein System model on the prediction of dry matter intake and milk production of grazing crossbred cows.

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