African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Carcass yield, cuts and body components in lambs fed a pineapple by-product silage diet

Acaína K. S. Elias
  • Acaína K. S. Elias
  • Department of Animal Science, University Federal Rural da Amazônia, Parauapebas, Brazil.
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Kaliandra S. Alves
  • Kaliandra S. Alves
  • Department of Animal Science, University Federal Rural da Amazônia, Parauapebas, Brazil.
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Luis Rennan S. Oliveira
  • Luis Rennan S. Oliveira
  • Department of Animal Science, University Federal Rural da Amazônia, Parauapebas, Brazil.
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Darley O. Cutrim
  • Darley O. Cutrim
  • Department of Animal Science, Federal Institute of Tocantins, Pedro Afonso, Brazil.
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Rafael Mezzomo
  • Rafael Mezzomo
  • Department of Animal Science, University Federal Rural da Amazônia, Parauapebas, Brazil.
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Vanessa P. Pontes
  • Vanessa P. Pontes
  • Department of Animal Science, University Federal Rural da Amazônia, Parauapebas, Brazil.
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Waldjâneo O. Melo
  • Waldjâneo O. Melo
  • Department of Animal Science, University Federal Rural da Amazônia, Paragominas, Brazil.
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Daiany I. Gomes
  • Daiany I. Gomes
  • Department of Animal Science, University Federal Rural da Amazônia, Parauapebas, Brazil.
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  •  Received: 24 February 2017
  •  Accepted: 12 June 2017
  •  Published: 13 July 2017

Abstract

The effect of pineapple by-product silage as a substitute for elephant grass on carcass yield, commercial cuts and non-carcass components was evaluated in 25 castrated male Santa Inês feedlot finishing lambs. The lambs had an initial body weight of 18.0±3.4 kg, and they were fed four pineapple by-product silage concentrations (0, 25, 50, 75 and 100%) distributed in a completely randomized design with five treatments and five repetitions. Lambs were slaughtered at a body weight of 30 kg. The hot carcass weight and hot carcass yield were recorded and chilled at 4°C for 24 h. The quantitative parameters of the carcass, the wholesale cuts expressed in kg and percentage, and non-carcass components were determined. Carcasses were divided into seven commercial cuts. The hot and cold carcass yields significantly increased when elephant grass was replaced with pineapple by-product silage in the diets. The weight of the false rib and loin cuts increased linearly when pineapple by-product silage was added to the diets (P< 0.05). No significant differences were observed in the weights of the other cuts (P>0.05). The average weights of the non-carcass components were not affected by the addition of pineapple by-product silage, except for gastrointestinal tract (GIT) content, which decreased linearly, and omental-mesenteric, perirenal and internal fat depots, which increased linearly with the addition of pineapple by-product silage to the diets. The use of pineapple by-product silage as a substitute for elephant grass in growing lamb diets is recommended because it did not negatively affect the carcass characteristics, commercial cut yields or non-carcass components.

Key words: Elephant grass, nutrition, sheep, small ruminant, pineapple.