A step-up ractopamine feeding program for finishing pigs

Background: Ractopamine (RAC) supplementation in the feed has been evaluated as a strategy to increase productive efficiency in finishing pigs. Objective: To evaluate the effects of different RAC dietary levels on performance, carcass traits, efficiency of lysine (ELU) and energy (EEU) utilization,...

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Autores principales:	Tiago L. Holzback, Anderson Corassa, Charles Kiefer, Alexandre O. Teixeira, Leonardo M. Moreira, Carlos M. R. Junior
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2018
Materias:	beta-adrenergic agonist carcass quality economy lysine pig nutrition Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/3f6ebdc416fe4545b83ca78619c4883f
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spelling	oai:doaj.org-article:3f6ebdc416fe4545b83ca78619c4883f2021-12-01T19:35:10ZA step-up ractopamine feeding program for finishing pigs2256-295810.17533/udea.rccp.v31n4a04https://doaj.org/article/3f6ebdc416fe4545b83ca78619c4883f2018-12-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/330974https://doaj.org/toc/2256-2958Background: Ractopamine (RAC) supplementation in the feed has been evaluated as a strategy to increase productive efficiency in finishing pigs. Objective: To evaluate the effects of different RAC dietary levels on performance, carcass traits, efficiency of lysine (ELU) and energy (EEU) utilization, and economic viability in finishing pig. Methods: A total of 40 barrows (74.75 ± 5.22 kg) were fed four RAC levels (0, 5, 10 and 5-10 mg/kg step-up program) from 0-14, 15-31 and 0-31 days. Performance, carcass characteristics, ELU, EEU, cost per unit of weight gain (CWG), payment and profit parameters were measured. The animals were distributed in a completely randomized design in four treatments, with ten replicates per treatment. The experimental unit was each animal. Results: Pigs fed RAC diets showed increased body weights at 14 and 31 days, average daily gain (ADG) at 0–14 and 0–31 days, ELU at 0-14 days, and hot carcass weight as compared with those fed the control diet. The step-up program as compared to the 10 mg/kg RAC concentration resulted in increased body weight, feed/gain ratio (FGR), ADG, ELU, EEU and CWG at 0–14 days. Payment by weight and bonus payment were better for treatments with RAC as compared to control. Conclusions: Pigs fed RAC improved performance, carcass weight, ELU, EEU and economic viability. The results were better for the step-up program compared with the intermittent use of 10 mg/kg RAC.Tiago L. HolzbackAnderson CorassaCharles KieferAlexandre O. TeixeiraLeonardo M. MoreiraCarlos M. R. JuniorUniversidad de Antioquiaarticlebeta-adrenergic agonistcarcass qualityeconomylysinepig nutritionAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 31, Iss 4, Pp 276-284 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	beta-adrenergic agonist carcass quality economy lysine pig nutrition Animal culture SF1-1100
spellingShingle	beta-adrenergic agonist carcass quality economy lysine pig nutrition Animal culture SF1-1100 Tiago L. Holzback Anderson Corassa Charles Kiefer Alexandre O. Teixeira Leonardo M. Moreira Carlos M. R. Junior A step-up ractopamine feeding program for finishing pigs
description	Background: Ractopamine (RAC) supplementation in the feed has been evaluated as a strategy to increase productive efficiency in finishing pigs. Objective: To evaluate the effects of different RAC dietary levels on performance, carcass traits, efficiency of lysine (ELU) and energy (EEU) utilization, and economic viability in finishing pig. Methods: A total of 40 barrows (74.75 ± 5.22 kg) were fed four RAC levels (0, 5, 10 and 5-10 mg/kg step-up program) from 0-14, 15-31 and 0-31 days. Performance, carcass characteristics, ELU, EEU, cost per unit of weight gain (CWG), payment and profit parameters were measured. The animals were distributed in a completely randomized design in four treatments, with ten replicates per treatment. The experimental unit was each animal. Results: Pigs fed RAC diets showed increased body weights at 14 and 31 days, average daily gain (ADG) at 0–14 and 0–31 days, ELU at 0-14 days, and hot carcass weight as compared with those fed the control diet. The step-up program as compared to the 10 mg/kg RAC concentration resulted in increased body weight, feed/gain ratio (FGR), ADG, ELU, EEU and CWG at 0–14 days. Payment by weight and bonus payment were better for treatments with RAC as compared to control. Conclusions: Pigs fed RAC improved performance, carcass weight, ELU, EEU and economic viability. The results were better for the step-up program compared with the intermittent use of 10 mg/kg RAC.
format	article
author	Tiago L. Holzback Anderson Corassa Charles Kiefer Alexandre O. Teixeira Leonardo M. Moreira Carlos M. R. Junior
author_facet	Tiago L. Holzback Anderson Corassa Charles Kiefer Alexandre O. Teixeira Leonardo M. Moreira Carlos M. R. Junior
author_sort	Tiago L. Holzback
title	A step-up ractopamine feeding program for finishing pigs
title_short	A step-up ractopamine feeding program for finishing pigs
title_full	A step-up ractopamine feeding program for finishing pigs
title_fullStr	A step-up ractopamine feeding program for finishing pigs
title_full_unstemmed	A step-up ractopamine feeding program for finishing pigs
title_sort	step-up ractopamine feeding program for finishing pigs
publisher	Universidad de Antioquia
publishDate	2018
url	https://doaj.org/article/3f6ebdc416fe4545b83ca78619c4883f
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A step-up ractopamine feeding program for finishing pigs

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