Calidad de la carne en corderos suplementados con tres concentraciones de zinc en una dieta energética.

Lira-Casas, Raymundo; Ramírez-Bribiesca, J. Efrén; Rayas-Amor, Adolfo A.; Diaz-Ramírez, Mayra; León-Espinosa, Erika B.; Jiménez-Guzmán, Judith; Fabela-Morón, Miriam F.; Cruz-Monterrosa, Rosy G.

Objective: To evaluate the effect of three doses of Zn supplemented in the diet on the quality and concentration of Zn in meat. Design/methodology/approach: Three doses of Zn were supplemented: a) 21 mg Zn/Kg of dry matter (DM) comes only from the diet, b) Zn80 (diet (a) + ZnSO4) and c) Zn400 (diet (a) + ZnSO4). Twelve Katahdin breed lambs randomly distributed into three groups, with a weight of 29.72±2.16 Kg and an age of 9±1 months. The DM consumed was restricted for all lambs to 718.62±10.84 g. Results: The luminosity of the psoas major muscle was Zn21=36.50, Zn80=38.14 and Zn400=35.35 (quadratic effect, P<0.01). The redness of the psoas major muscle was between 18.81 to 19.72 and the intensity of the yellow color was from 3.63 to 3.82. The pH of the gracilis and psoas major muscles were 6.21 and 6.91. There were no differences in pH, luminosity and hardness. The water retention capacity of the gracilis muscle was Zn21=63.68%, Zn80=65.32% and Zn400=83.80% (linear effect, P<0.05). The Zn content in the muscle was 180 to 242 mg/kg DM. Study limitations/implications: The number of lambs per treatment was limited. It is unknown whether high doses of Zn in the diet affect voluntary consumption by animals. Findings/conclusion: There were no physicochemical changes in the meat with the doses of Zn. The amount of 80 mg/ kg of Zn in the diet can be used in lambs for fattening.

PSOAS muscles; DIETARY supplements; LAMBS; ERECTOR spinae muscles; ANIMAL nutrition; LUMINOSITY

Agro Productividad, 2020, Vol 13, Issue 8, p13

2448-7546

Academic Journal

10.32854/agrop.vi.1730