Data/hora: 05/06/2024 01:50:15

Provedor de dados: | 65
País: | Brazil
Título: | Net energy and ractopamine levels for barrows weighing 70 to 100kg
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.
Data: | 2016-07-01
Ano: | 2016
Palavras-chave: | Carcass; Energy requirement; Nutrition.
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&gt;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&gt;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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701268
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20151115
Formato: | text/html
Fonte: | Ciência Rural  v.46 n.7 2016
Fonte: | info:eu-repo/semantics/openAccess