| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Net energy and ractopamine levels for barrows weighing 70 to 100kg
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| Autores: |
Gonçalves,Liliane Maria Piano
Kiefer,Charles
Souza,Karina Márcia Ribeiro de
Marçal,Danilo Alves
Abreu,Rodrigo Caetano de
Santos Nieto,Viviane Maria Oliveira dos
Rodrigues,Gabriela Puhl
Alencar,Stephan Alexander da Silva
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| Data: |
2016-07-01
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| Ano: |
2016
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| Palavras-chave: |
Carcass
Energy requirement
Nutrition
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| Resumo: |
ABSTRACT: The purpose of this study was to evaluate net energy and dietary ractopamine levels for barrows weighing 70 to 100kg. The 150 pigs investigated (initial weight 70.80±3.84kg) were distributed in a randomized block design with a 5×3 factorial arrangement, comprising five levels of net energy (2,300; 2,425; 2,550; 2,675; and 2,800Kcal kg-1 of diet) and three levels of ractopamine (5, 10, and 20ppm kg-1 of diet), with five replicates, and two animals per experimental unit. No interaction (P>0.05) was observed between net energy and ractopamine levels. Increasing the dietary net energy levels led to a linear reduction in feed intake, with a linear improvement in feed conversion. Net energy levels had no observable effect (P>0.05) on weight gain, final weight, or carcass characteristics. A dietary net energy level of 2,800Kcal kg-1 can be recommended for pigs weighing 70-100kg, improving feed conversion without affecting carcass characteristics, regardless of dietary ractopamine levels. Ractopamine levels above 5ppm did not affect performance or modify the quantitative characteristics of carcasses, regardless of dietary net energy levels.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701268
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/0103-8478cr20151115
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.46 n.7 2016
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| Direitos: |
info:eu-repo/semantics/openAccess
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