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| Amaral,Nikolas de Oliveira; Fialho,Elias Tadeu; Cantarelli,Vinícius de Souza; Zangeronimo,Márcio Gilberto; Rodrigues,Paulo Borges; Girão,Lúcio Vilela Carneiro. |
| An experiment was carried out to evaluate the performance, carcass composition, cutting yields and economic viability of 5 or 10 ppm of ractopamine hydrochloride (RAC) in diets for barrows and gilts from 94 to 130 kg. Sixty commercial hybrid pigs within a gender, were individually kept in pens and assigned a randomized experimental block design, in a 3 × 2 factorial arrangement, with three levels of RAC (0; 5 and 10 ppm) and two sexs (barrows and gilts). There were no RAC × sex interactions for all evaluated parameters. There were significant improvements for the groups of RAC-treated on final weight, average daily gain (ADG) and feed:gain (F:G). The RAC, independent from the level (5 or 10 ppm), improved the F:G, but did not influence the average feed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additive; Carcass modifier; Lean meat; Nutrition; Performance. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000800013 |
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| Barbosa,Carlos Enrique da Trindade; Silva,Carolina Teixeira Costa; Cantarelli,Vinícius de Souza; Zangeronimo,Márcio Gilberto; Sousa,Raimundo Vicente de; Garbossa,Cesar Augusto Pospissil; Amaral,Níkolas de Oliveira; Zeviani,Walmes Marques. |
| Performance and carcass and cut yield of finishing pigs of three sexual categories fed diets with different levels of ractopamine were studied. Forty-eight hybrid animals (initial weight of 92.1±2.4 kg) were distributed in a completely randomised design in 3 × 2 factorial arrangement (three sexual categories: surgically castrated males, two females and immunologically castrated males - with or without 10 ppm of ractopamine), totalling six treatments and eight repetitions with one animal per experimental plot during 28 days. Ractopamine improved weight gain and feed conversion of all sexual categories. The best results were obtained with immunologically castrated males, which, in turn, had lower carcass yield and backfat thickness in the belly. In the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additives; Bonus rate; Carcass modifier; Immunologically castrated males; Swine nutrition. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500014 |
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| Almeida,Erin Caperuto de; Fialho,Elias Tadeu; Rodrigues,Paulo Borges; Zangeronimo,Márcio Gilberto; Lima,José Augusto de Freitas; Fontes,Dalton de Oliveira. |
| It was evaluated the effect of diets supplemented or not supplemented with ractopamine and digestible lysine on the performance and carcass characteristics of finishing pigs. A total of 50 barrows and 50 gilts (90.2 kg ± 3.5 kg) were used. In the growth performance trial, a randomized block design was utilized in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine (0.68; 0.78; 0.88; 0.98 and 1.08%) and two levels of ractopamine (0 and 5 ppm), totaling ten diets and five replications. In a study of carcass characteristics, the same design and levels of lysine and ractopamine were used, but another factor (sex of animals- female and male) was included, totaling 20 treatments, each one with five replicates. Except for lysine daily... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additives; Amino acid; Carcass modifier; Nutrition. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000900014 |
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