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- Title
Chromium and feed restriction as alternative strategies to ractopamine in finishing pigs.
- Authors
Caetano de Abreu, Rodrigo; Kiefer, Charles; Ribeiro de Souza Nascimento, Karina Márcia; Corassa, Anderson; Alves Marçal, Danilo; da Silva Alencar, Stephan Alexander; Puhl Rodrigues, Gabriela; Aguiar Farias, Taynah Vieira; Baptista dos Santos, Tânia Mara
- Abstract
This study evaluated chromium and quantitative and qualitative feed restriction as alternative nutritional strategies to ractopamine in finishing barrows. Fifty barrows, genetically similar, with an initial body weight of 99.0 ± 4.3 kg and a final body weight of 117.2 ± 5.8 kg were used. The animals were distributed in a randomized complete block design with five nutritional treatments (Control; Rac = 10ppm ractopamine; Chromium = 0,8mg chromium yeast; Quality = qualitative restriction, 7.5% less net energy in the diet; Quanti = 15% quantitative reduction in feed supply), with five replicates and two animals per replicate. Chromium supplementation and quantitative feed restriction reduced feed, lysine, net energy, and crude protein intakes (P < 0.05). Chromium, ractopamine, and quantitative restriction improved feed conversion (P < 0.05). Supplementation with chromium and ractopamine and feed restriction did not influence the carcass characteristics of the pigs (P < 0.05). Quantitative feed restriction and supplementation of 0.8mg of chromium yeast are presented as potential alternatives to ractopamine in the diet of finishing pigs.
- Subjects
RACTOPAMINE; CHROMIUM; BODY weight; BLOCK designs; LYSINE; SWINE; SWINE breeding
- Publication
Ciência Rural, 2024, Vol 54, Issue 5, p1
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/0103-8478cr20220673