Acta Scientiarum: Animal Sciences (Apr 2006)

Desempenho e características de carcaça de bovinos mestiços de origem leiteira em condições de pastejo, restrito ou “ad libitum”, período das águas = Performance and carcass characteristics of dairy crossbreds bulls in grazing, restricted or “ad libitum”, during rainy season

  • Wellington Samay de Melo,
  • Antonia Sherlânea Chaves Véras,
  • Marcelo de Andrade Ferreira,
  • Wilson Moreira Dutra Junior,
  • Dulciene Karla Bezerra de Andrade,
  • Kedes Paulo Pereira

Journal volume & issue
Vol. 28, no. 2
pp. 223 – 230

Abstract

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Este trabalho objetivou avaliar o desempenho e as características de carcaça de bovinos mestiços (5/8 Holandês/Zebu) em pastejo de “Brachiaria decumbens” com acesso restrito ou “ad libitum”. Utilizaram-se 16 animais com idade e peso médios de 10 meses e 180kg, respectivamente. Os animais foram distribuídos em delineamento de blocos casualizados, nos seguintes tratamentos: PAV = pastejo à vontade e PR = pastejo restrito (4 horas/dia). O período experimental teve duração de 114 dias. Observaram-se diferença entre os tratamentos(PThe aim of this work was to evaluate the performance and carcass characteristic of crossbred bulls (5/8 holstein/zebu) in grazing of “Brachiaria decumbens” with restrict access or "ad libitum". 16 animals with an average of age and live weight of 10 months and 180kg respectively were used. The animals were assigned in a randomized block design, according to the following treatments: “ad libitium” grazing (AG) and restricted grazing (RG) (4 hours/day). The experimental period lasted 114 days. There were statistical differences between the treatments (P<0.05) on final live weight (FLW): 229.83 and 207.42 kg for unlimited grazing and restricted grazing, respectively, as well as for average daily gain (ADG): 0.618 and 0.230 kg. There were also statistical differences between the treatments (P<0.05) to final empty body weight, daily empty body weight gain, hot and cold carcass weight, cold carcass yield (CCY/FLW) and loin eye area according to the two methods used. The performance of the animals in restricted grazing had satisfactory results to the rainy season in pasture of Brachiaria decumbens. Themethods to determine the loin eye area did not differ. However, the "plastic grid" is more recommended.

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