Data/hora: 01/06/2024 09:12:26

Biblioteca(s): | Epagri-Sede.
Data corrente: | 03/07/2017
Data da última atualização: | 03/07/2017
Autoria: | VAN CLEEF, E. H. C. B.; D'AUREA, A. P.; FAVARO, V. R.; CLEEF, F. O. S. V.; BARDUCCI, R. S.; ALMEIDA, M. T. C.; MACHADO NETO, O. R.; EZEQUIEL, J. M. B.
Título: | Effects of dietary inclusion of high concentrations of crude glycerin on meat quality and fatty acid profile of feedlot fed Nellore bulls.
Ano de publicação: | 2017
Fonte/Imprenta: | Plos One, Illinois, v. 12, p. 1-17, 2017.
Idioma: | Inglês

Conteúdo:

Crude glycerin, the main by-product of biodiesel production, can replace dietary energy
sources, such as corn. The objective of this study was to evaluate the inclusion of up to 30%
of crude glycerin in dry matter (DM) of the total diets, and its effects on meat quality parameters
of feedlot Nellore bulls. Thirty animals (227.7 ± 23.8 kg body weight; 18 months old)
were housed in individual pens and fed 5 experimental diets, containing 0, 7.5, 15, 22.5 or
30% crude glycerin (DM basis). After 103 d (21 d adaptation) animals were slaughtered and
the Longissimus muscle was collected. The characteristics assessed were chemical composition,
fatty acid profile, cholesterol, shear force, pH, color, water-holding capacity, cooking
loss and sensory properties. The increasing inclusion of crude glycerin in the diets did
not affect the chemical composition of the Longissimus muscle (P > 0.10). A quadratic effect
was observed when levels of crude glycerin were increased, on the concentration of pentadecanoic,
palmitoleic and eicosenoic fatty acids in meat (P < 0.05), and on the activity of the
delta-9 desaturase 16 and delta-9 desaturase 18 enzymes (P < 0.05). The addition of crude
glycerin increased the gamma linolenic fatty acid concentration (P < 0.01), and altered the
monounsaturated fatty acids in Longissimus muscle of animals (Pquad. < 0.05). Crude glycerin
decreased cholesterol content in meat (P < 0.05), and promoted higher flavor score and
greasy intensity perception of the meat (P < 0.01). The inclusion of up to 30% crude glycerin
in Nellore cattle bulls`diets (DM basis) improves meat cholesterol and sensory attributes,
such as flavor, without affecting significantly the physical traits, the main fatty acid concentrations
and the chemical composition.

Palavras-Chave: | cattle; feedllot; glycerin; meat quality.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_39310.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (101304-1) - UPC - AP - DD -  -  -  - DIS