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Volume 56, issue 1
Arch. Anim. Breed., 56, 303–314, 2013
https://doi.org/10.7482/0003-9438-56-030
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 56, 303–314, 2013
https://doi.org/10.7482/0003-9438-56-030
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Oct 2013

10 Oct 2013

Influence of dietary magnesium and selenium levels in finishing diets on growth performance and carcass meat quality of feedlot Pelibuey lambs

L. M. Hernandez-Calva1, J. E. Ramirez-Bribiesca2, I. Guerrero-Legarreta3, L. Hernandez-Cruz2, L. Avendaño-Reyes4, I. Dominguez Vara5, and L. R. McDowell6 L. M. Hernandez-Calva et al.
  • 1Universidad Autonoma de Tlaxcala, Tlaxcala, Mexico
  • 2Colegio de Postgraduados, Texcoco, Mexico
  • 3Universidad Autonoma Metropolitana, Mexico City, Mexico
  • 4Universidad Autonoma de Baja California, Mexicali, Mexico
  • 5Universidad Autonoma del Estado de Mexico, Toluca, Mexico
  • 6University of Florida, Gainesville, USA

Abstract. The objective of this study was to evaluate the influence of supplemental dietary selenium (Se) and magnesium (Mg) on feedlot lambs. Sixty-four male lambs were randomly distributed to the following treatments: 1) low level of Mg and Se: diet with 0.18% of Mg and 0.1 μg Se/g, 2) with supplementation of magnesium oxide (MgO): diet with 0.32% of Mg and 0.1 μg Se/g, 3) with supplementation of Sodium selenite (Na2SeO3): diet with 0.3 μg Se/g and 0.18 % of Mg, 4) With supplementation of MgO and Na2SeO3: diet with 0.32% of Mg and 0.3 μg Se/g. There were no differences (P>0.05) in the average daily gain and feed conversion but Se supplement with Na2SeO3 (0.3 μg Se/g) enhanced dry matter intake, dressing percentage (P<0.05) and leg muscle weight (P<0.02). The average values of the water retained potential, coordinate L, a, and sensory analysis were different with Se (P<0.05). Magnesium suplemented as inorganic source (0.32% of Mg) enhanced (P<0.05) some characteristics in sensorial meat analysis.

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