Carcass characteristics and meat quality of goats fed increasing levels of crude glycerin.

Rayane N Gomes,Francisco F.R De Carvalho,Antonia S.C Véras,Eduardo H.A Cordeiro,Ligia M.G Barreto,Marcelo A Ferreira,Talita A De Paula,Maria Luciana M.W Neves,Giorgio O Mendes,Ana B De Oliveira

doi:10.1590/0001-3765202220200083

Abstract

Crude glycerin is a byproduct of the biodiesel industry and has been widely used in ruminant diets as a source of energy, usually in place of corn, primarily during periods of drought in tropical regions. The objective of this study was to evaluate the effect of including levels of the crude glycerin of low purity (0, 6, 12 and 18%) replacing corn in the diets of goats on the carcass characteristics, tissue composition, meat cuts yield and physicochemical parameters of meat. Forty males castrated without defined racial pattern goats an initial average weight of 19.70 ± 2.30 kg were slaughtered after 86 days. Diets content 0 and 6% crude glycerin promoted similar responses to the analyzed variables, except for pH and breast weight. No differences were observed to total digestible nutrients, slaughter body weight, commercial cut yield leg tissue composition and physicochemical parameters of meat. Crude glycerin can be included up to 12% without losses on carcass weight and meat cuts, leg composition, and meat quality. The inclusion of crude glycerin containing 63.06% glycerol and 45.57% lipids could be effective in partial replacement of corn in diets for confined goats in tropical areas.

Highlights

In tropical areas, during periods of drought, producers often supplement animal feed with concentrated feed containing corn to maintain adequate livestock weight gain and meet the market’s demand for animal meat (Cardoso et al 2019)
The objective of this study was to evaluate the effect of including levels of the crude glycerin of low purity (0, 6, 12 and 18%) replacing corn in the diets of goats on the carcass characteristics, tissue composition, meat cuts yield and physicochemical parameters of meat
No differences were observed to total digestible nutrients, slaughter body weight, commercial cut yield leg tissue composition and physicochemical parameters of meat

Summary

Introduction

In tropical areas, during periods of drought, producers often supplement animal feed with concentrated feed containing corn to maintain adequate livestock weight gain and meet the market’s demand for animal meat (Cardoso et al 2019). Concentrate supplements are expensive (Matos et al 2018), and causes increases production costs and may have a negative economic impact on animal husbandry (Cardoso et al 2019). Food of animal origin destined for human consumption should be changed in such a way as to improve the sources of protein and energy, using available high-quality grain and animal protein. According to AbuGhazaleh et al (2010), the governmental encouragement to biofuels productions has been strongly impacted the production of agriculture and animal production, due to the corn and other feedstuffs have higher prices, An Acad Bras Cienc (2022) 94(1)

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