Biological and economic performance of genetic groups under different diets


  • Valéria Pacheco Batista Euclides EMBRAPA GADO DE CORTE
  • Fernando Paim Costa EMBRAPA GADO DE CORTE
  • Kepler Euclides Filho EMBRAPA
  • Denise Baptaglin Montagner EMBRAPA GADO DE CORTE
  • Geraldo Ramos Figueiredo EMBRAPA GADO DE CORTE



Brachiaria brizantha, deferred grazing, feed supplementation, Panicum maximum, rotational grazing


A grazing trial to evaluate biological and economic efficiencies for rearing young animals exclusively on pasture from weaning at 7 months of age, with average initial weight of 220 ± 12 kg, to slaughter was conducted from May 2006 to October 2007. Two levels of combined supplementation during the first dry period and four genetic groups (F1 Angus-Nellore; ½Braford-¼Angus-¼Nellore; ½Brahman-¼Angus-¼Nellore; and â…Charolais-â…œNellore) were used following a 4 by 2 factorial arrangement and eight replications in a completely randomized design. During both dry periods, eight paddocks of deferred Brachiaria brizantha were utilized. During the first dry period, concentrated mix (CM) and protein-mineral mixture (PMM) were provided in quantities of 0.8% and 0.2% of body weight (BW), respectively, for 142 days. During the subsequent rainy period, the animals were transferred to eight guinea grass paddocks for 197 days. During the second dry period, the animals were allocated to the same eight palisade grass paddocks used during the previous dry season. Steers had received supplementary diet with the same CM used before at 0.8% of BW. Animals supplemented with CM gained more BW than those supplemented with PMM; however, during the rainy season, steers supplemented with PMM performed better than those receiving CM during the preceding dry period. Using concentrate since the first dry season is a risky option in economic terms, as only the Angus-Nellore group showed a positive but small gain.


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How to Cite

EUCLIDES, V.P.B., COSTA, F.P., EUCLIDES FILHO, K., MONTAGNER, D.B. and FIGUEIREDO, G.R., 2018. Biological and economic performance of genetic groups under different diets . Bioscience Journal [online], vol. 34, no. 6, pp. 1683–1692. [Accessed24 February 2024]. DOI 10.14393/BJ-v34n6a2018-39808. Available from:



Agricultural Sciences