title: Carcass characteristics of feedlot lambs fed crude glycerin contaminated with high concentrations of crude fat.
abstract: Thirty non-castrated male lambs with 20±2.3 kg average body weight (BW) were randomly assigned to five treatments consisted of different dietary concentrations of crude glycerin (CG; 0, 3, 6, 9 and 12% on DM basis) to evaluate the effects on performance, carcass and meat quality traits. A quadratic effect was observed for performance (P=0.04), final BW (P<0.01) and hot carcass weight (P<0.01). No effects of CG were observed (P>0.05) on carcass pH neither on shear-force, cooking loss and ether extract content in longissimus. The inclusion of CG tended to reduce the Zn content in meat (P=0.09). The data suggests that CG (36.2% of glycerol and 46.5% of crude fat) may be used in diets of finishing lambs with concentrations up to 3% without negative effects on performance and main carcass traits. Moreover, inclusion of CG seems to not affect quality and safety of meat for human consumption.
authors.affiliation: Departamento de Zootecnia da Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Campus Jaboticabal, CEP: 14884-900, Jaboticabal, SP, Brazil. Electronic address: josilage@gmail.com.
authors.forename: J F
authors.initials: JF
authors.lastname: Lage
authors.forename: P V R
authors.initials: PV
authors.lastname: Paulino
authors.forename: L G R
authors.initials: LG
authors.lastname: Pereira
authors.forename: M S
authors.initials: MS
authors.lastname: Duarte
authors.forename: S C
authors.initials: SC
authors.lastname: Valadares Filho
authors.forename: A S
authors.initials: AS
authors.lastname: Oliveira
authors.forename: N K P
authors.initials: NK
authors.lastname: Souza
authors.forename: J C M
authors.initials: JC
authors.lastname: Lima
mesh_terms: D000003:Abattoirs; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D003296:Cooking; D004032:Diet / Q000662:veterinary; D004041:Dietary Fats / Q000008:administration & dosage*; D004044:Dietary Proteins / Q000032:analysis; D005990:Glycerol / Q000008:administration & dosage*; D008297:Male; D008460:Meat / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis; D018482:Muscle, Skeletal / Q000737:chemistry; D034561:Sheep, Domestic; D015032:Zinc / Q000032:analysis
chemical_list: D004041:Dietary Fats; D004044:Dietary Proteins; D019216:Metals, Heavy; D015032:Zinc; D005990:Glycerol
keywords: By-product; Feedlot; Glycerol; Ruminants; Sheep