Abstract
ABSTRACT: The present study was performed to evaluate the association of chromium-yeast and selenium-yeast as nutritional additives to enhance performance and quantitative characteristics in the carcass of finishing barrows. A total of 48 barrows, commercial hybrid, with initial weight of 68.3±3.5 kg and final weight of 99.6±3.6 kg, were utilized for the study. The animals were distributed in a randomized complete block design, consisting of three levels of chromium-yeast and selenium-yeast (i.e., without supplementation of chromium-yeast and selenium-yeast, supplementation of 0.4 mg kg-1 chromium-yeast and 0.3 mg kg-1 selenium-yeast, and supplementation of 0.8 mg kg-1 chromium-yeast and 0.6 mg kg-1 selenium-yeast) with eight replicates and two animals per experimental unit. The supplementation of chromium and selenium-yeast did not significantly affect (P>0.05) the average daily feed intake, digestible lysine, crude protein and metabolizable energy intake, average daily weight gain, feed conversion, weight and carcass length, back fat thickness, muscle depth, percentage and amount of lean meat, and carcass allowance. These findings suggest that supplementation of chromium and selenium-yeast does not affect the performance or quantitative characteristics in the carcass of finishing barrows.
Highlights
Minerals are nutrients that have roles in structural, physiological, immunological, reproductive, and growth functions in animals
Several studies have reported a positive effect of chelated chromium increasing weight gain, feed intake and lean meat deposition and decreasing fat deposition (LI et al, 2013; SALES & JANCÍK, 2011), but others observed no improvement with supplementation (TIAN et al, 2014; TIAN et al, 2015; MARCOLLA et al, 2017)
The supplementation of 0.4mg kg-1 of chromium-yeast did not provide a positive effect on performance and carcass characteristics of pigs from 70 to 120 kg (MARCOLLA et al, 2017)
Summary
Minerals are nutrients that have roles in structural, physiological, immunological, reproductive, and growth functions in animals. Several studies have reported a positive effect of chelated chromium increasing weight gain, feed intake and lean meat deposition and decreasing fat deposition (LI et al, 2013; SALES & JANCÍK, 2011), but others observed no improvement with supplementation (TIAN et al, 2014; TIAN et al, 2015; MARCOLLA et al, 2017).
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