Universidade Federal Rural de Pernambuco, Departamento de Zootecnia, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, 52171-900 Recife, PE, Brazil.
Universidade Federal de Sergipe, Núcleo de Graduação em Zootecnia, Rodovia Engenheiro Jorge Neto, Km 3, Nossa Senhora da Glória, 49680-000 Silos, SE, Brazil.
An Acad Bras Cienc. 2022 Feb 28;94(1):e20200083. doi: 10.1590/0001-3765202220200083. eCollection 2022.
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.
粗甘油是生物柴油工业的副产品，已广泛应用于反刍动物饲料中作为能量来源，通常在热带地区干旱时期替代玉米。本研究的目的是评估在山羊日粮中添加不同水平（0、6、12 和 18%）低纯度粗甘油对胴体特性、组织组成、肉切块产量和肉的理化参数的影响。40 只无特定品种的雄性去势山羊，初始平均体重为 19.70±2.30kg，经过 86 天的饲养后进行屠宰。日粮中添加 0 和 6%粗甘油对分析变量的反应相似，但 pH 值和胸肉重量除外。总可消化养分、屠宰体重、商业切块产量、腿部组织组成和肉的理化参数均无差异。粗甘油的添加量可达 12%，不会导致胴体重和肉切块、腿部组成和肉品质下降。含有 63.06%甘油和 45.57%脂类的粗甘油可以有效替代热带地区圈养山羊日粮中的部分玉米。
