Semina: Ciências Agrárias (Feb 2015)

Crude glycerin in diets for Nelore heifers on pasture in dry season

  • Gonçalo Mesquita da Silva,
  • Fabiano Ferreira da Silva ,
  • Robério Rodrigues Silva ,
  • Fábio Andrade Teixeira ,
  • Danilo Ribeiro de Souza ,
  • Alex Resende Schio ,
  • Rodrigo Gonçalves Mateus ,
  • Murilo de Almeida Meneses ,
  • Dicastro Dias de Souza ,
  • Julinessa Silva Oliveira de Oliveira ,
  • Eli Santana de Oliveira Rodrigues ,
  • Wagner Patrick Sá Teles Silva Pondé

DOI
https://doi.org/10.5433/1679-0359.2015v36n1p467
Journal volume & issue
Vol. 36, no. 1
pp. 467 – 484

Abstract

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This study aimed to evaluate the inclusion of crude glycerin (CG) in the diet of Nellore heifers grazing Brachiaria brizantha during the dry season, on nutrients intake and digestibility, performance, reproductive efficiency and economic viability. Sixty Nelore heifers with initial average weight of 285.89 ± 18.74 kg and approximately 19 ± 2 months of age, were distributed in a completely randomized design with five diets containing 0.0; 4.0; 8.0; 12.0 and 16.0% of CG inclusion in the diet. The average dry matter (DM) daily intake showed decreasing linear effect (P 0.05), with a mean value of 50.93%. The average daily gain (ADG) of heifers showed decreasing linear effect (P0.05) by dietary inclusion of GB, with average values of 75% and 1.29 doses pregnant-¹, respectively. The economic viability indicators were not positive in the short and medium term. Supplements for over 0.7% of the PC in animals maintained in Brachiaria brizantha with low nutritional quality, it is not recommended to include GB, since its inclusion in any level reduced around 15% weight gain. However, depending on the cost of coproduct, it can be includes up to 16% in the diet, even considering this drop in performance.

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