Effect of Zilpaterol Hydrochloride on Performance and Meat Quality in Finishing Lambs

Jorge Adalberto Cayetano- De-Jesus, Rolando Rojo-Rubio, Alicia Grajales-Lagunes, Leonel Avendaño-Reyes, Ulises Macias-Cruz, Veronica Gonzalez-del-Prado, Agustin Olmedo-Juárez, Alfonso Chay-Canul, José Alejandro Roque-Jiménez and Héctor Aarón Lee-Rangel
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Jorge Adalberto Cayetano- De-Jesus: Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, SanLuis Potosi 78000, Mexico
Rolando Rojo-Rubio: Centro Universitario UAEM Temascaltepec, Universidad Autónoma del Estado de México, Temascaltepec 513000, Mexico
Alicia Grajales-Lagunes: Facultad de Ciencias Quimicas, Universidad Autónoma de San Luis Potosí, San Luis Potosi 78000, Mexico
Leonel Avendaño-Reyes: Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Mexicali 21705, B.C., Mexico
Ulises Macias-Cruz: Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Mexicali 21705, B.C., Mexico
Veronica Gonzalez-del-Prado: Centro Universitario UAEM Temascaltepec, Universidad Autónoma del Estado de México, Temascaltepec 513000, Mexico
Agustin Olmedo-Juárez: Centro Nacional de Investigación Disciplinaria en Parasitología Veterinaria, Progreso 97320, Mexico
Alfonso Chay-Canul: División Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Villahermosa 86280, Mexico
José Alejandro Roque-Jiménez: Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, SanLuis Potosi 78000, Mexico
Héctor Aarón Lee-Rangel: Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, SanLuis Potosi 78000, Mexico

Agriculture, 2020, vol. 10, issue 6, 1-12

Abstract: Twenty-four Dorper x Pelibuey lambs were housed in individual pens during a 31-d feeding period and assigned to four treatments ( n = 6) under a randomized complete block design with different daily doses of zilpaterol hydrochloride (ZH): 0 (control), 0.1, 0.2, and 0.3 mg/kg BW to determine the effects of ZH supplementation on productive performance, meat quality, and wholesale cut yields. Final BW ( p = 0.02) and average daily gain (ADG, p = 0.04) were greater in lambs supplemented with 0.2 mg/kg BW. Supplemental ZH tended to improve dry matter intake (DMI, p = 0.008) and ADG:DMI ratio ( p = 0.078). Wholesale cut yields were not affected by ZH supplementation. Percentage of head was greater ( p = 0.04) in lambs treated with ZH. The ZH supplementation did not affect carcass characteristics. However, longissimus thoracis et lumborum (LTL) presented a linear trend ( p = 0.08) of increasing with ZH supplementation. Percentage of blood presented a trend ( p = 0.051) of decreasing with ZH supplementation. Also, liver decreased in size ( p < 0.05) for treatments where ZH was included. Values of luminosity decreased ( p < 0.02) when ZH dosage increased. The value of protein Lowry was greater, with 0.3 mg kg −1 ( p = 0.04). Cathepsin B + L was greater in the lambs from the control treatment ( p = 0.05). In conclusion, using a daily ZH dosage of 0.2 mg per kg of BW produced the best productive performance, carcass characteristics, and some changes in the meat of hair-breed lambs.

Keywords: zilpaterol hydrochloride; meat quality; hair breeds; lamb performance (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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