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| Almeida,Vivian Vezzoni de; Nuñez,Amoracyr José Costa; Miyada,Valdomiro Shigueru. |
| The β-adrenergic agonist ractopamine is increasingly used in the swine industry due to higher consumer demand for leaner pork products. Redirecting nutrients to favor leanness rather than fat deposition, ractopamine improves growth and carcass traits of finishing pigs. However, the impact of this agonist on pork quality is not clearly defined. Understanding the biological effects of dietary ractopamine dose, treatment period, lysine levels, and the lysine to metabolizable energy ratio will help pork producers achieve improvements in animal performance, carcass leanness, and economic efficiency in swine production systems. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β-adrenergic agonist; Carcass leanness; Growth; Nutrition; Swine. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000300016 |
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| Nuñez,Amoracyr José Costa; Caetano,Mariana; Berndt,Alexandre; Demarchi,João José Assumpção de Abreu; Leme,Paulo Roberto; Lanna,Dante Pazzanese Duarte. |
| Zebu cattle fed high concentrate diets may present inconsistent performance due to the occurrence of metabolic disorders, like acidosis. The isolated use of ionophores and virginiamycin in high grain diets can improve animal performance and reduce the incidence of such disorders, but recent studies suggested that their combination may have an additive effect. Thus, 72 Nellore steers, 389 ± 15 kg initial body weight (BW), were confined and fed for 79 days to evaluate the combination of virginiamycin and salinomycin on performance and carcass traits. Animals were allocated to a randomized complete block design by BW, in a 2 × 2 factorial arrangement of treatments, with two concentrate levels (73 and 91 %) and two virginiamycin levels (0 and 15 mg kg-1), and... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000400002 |
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