Fatty acid composition of beef cattle finished on tropical pasture and supplemented with crude glycerin
DOI:
https://doi.org/10.5433/1679-0359.2019v40n2p993Keywords:
Biodiesel, Glycerol, Meat quality, Supplementation.Abstract
The aim of this study was to evaluate the effect of crude glycerin supplementation on the chemical composition and fatty acid profile of the muscle of cattle grazing on Urochloa decumbens. Thirty-five crossbreed bulls, with an average initial body weight of 428.0 ± 32.11 kg, were supplemented with dry matter corresponding to 1% body weight for 74 days on pasture and distributed to five treatments (0, 3, 6, 9 and 12% low purity glycerin in the total dry matter of the supplement) in a completely randomised design. After 74 days, the animals were slaughtered, and the longissimus dorsi muscle was sampled and frozen for meat composition analysis. The addition of glycerin did not affect the mean moisture (73.6 ± 0.3%), protein (22.8 ± 0.4%), total lipid (1.1 ± 0.1%) and ash (1.0 ± 0.04%) contents of the animal muscle. However, there was an increasing linear effect (P < 0.05) on the contents of trans-vaccenic acid (increase of 175% in relation to the control) and conjugated linoleic acid (CLA) (25% increase in relation to the control). We observed an increasing linear pattern in monounsaturated fatty acid levels (39.8 to 44.5%) and a decreasing linear pattern in polyunsaturated fatty acid content (13.5 to 9.5%). The inclusion of crude glycerin promoted a linear decreasing pattern for ?-3 fatty acids. Thus, the inclusion of crude glycerin in the supplement of beef cattle affects the fatty acid composition of the meat. The use of this byproduct promotes desirable changes in the chemical composition of fatty acids, increasing the levels of conjugated linoleic fatty acids (18: 2 c9 t11) and monounsaturated fatty acids.Metrics
References
BESERRA, V. A.; CESAR, A. S.; PERES, A. A. C. Adoção da glicerina bruta na dieta animal e seu impacto no produto final. Archivos de Zootecnia, Córdoba, v. 65, n. 250, p. 259-265, 2016.
BLIGH, E. G.; DYER, W. J. A rapid method of total lipid extraction and purification. Canadian Journal of Biochemistry and Physiology, Alberta, v. 37, n. 8, p. 911-917, 1959.
BOTINI, L. A.; MORAES, K. A. K.; MORAES, E. H. B. K.; PINA, D. S.; PAULA, D. C.; HOFFMANN, A.; STINGUEL, H.; SOCREPPA, L. M.; MENESES, D. M. Glicerina bruta em suplementos para bovinos de corte a pasto no período seco. Pesquisa Agropecuária Brasileira, Brasília, v. 50, n. 3, p. 242-249, 2015.
CATRILEO, A.; MORALES, R.; ROJAS, C.; CANCINO, D. Beef production from dairy bulls under two different production systems and its effect on the fatty acid profile and beef quality. Chilean Journal of Agricultural Research, Chillán, v. 74, n. 3, p. 366-370, 2014.
FAVARO, V. R.; EZEQUIEL, J. M.; ALMEIDA, M. T.; D'AUREA, A. P.; PASCHOALOTO, J. R.; VAN CLEEF, E. H.; CARVALHO, V. B.; JUNQUEIRA, N. B. Carcass traits and meat quality of Nellore cattle fed different non-fiber carbohydrates sources associated with crude glycerin. Animal, Cambridge, v. 10, n. 8, p. 1402-8, 2016.
HARNACK, K.; ANDERSEN, G.; SOMOZA, V. Quantitation of alpha-linolenic acid elongation to eicosapentaenoic and docosahexaenoic acid as affected by the ratio of n6/n3 fatty acids. Nutrition & Metabolism, London, v. 19, n. 6, p. 8, 2009.
INSTITUTO NACIONAL DE CIÊNCIA E TECNOLOGIA - CIÊNCIA ANIMAL - INCT-CA. Métodos para análise de alimentos. Visconde do Rio Branco: Suprema, 2012. 214 p.
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION - ISO. Animal and vegetable fats and oils - Preparation of methyl esters of fatty acids (Method ISO 5509). Geneve: ISO, 1978. p.1-6.
MANNI, K.; RINNE, M.; HUUSKONENC, A.; HUHTANEN, P. Effects of contrasting concentrate feeding strategies on meat quality of growing and finishing dairy bulls offered grass silage and barley based diets. Meat Science, Illinois, v. 143, n. 2, p. 184-189, 2018.
NAFIKOV, R. A.; BEITZ, D. C. Carbohydrate and lipid metabolism in farm animals. The Journal of Nutrition, London, v. 137, n. 3, p. 702-705, 2007.
NATIONAL RESEARCH COUNCIL - NRC. Nutrient requirements of dairy cattle. 7th ed. Washington: National Academy Press, 2000. 450 p.
PALMQUIST, D. L.; MATTOS, W. R. S. Metabolismo de lipídeos. In: BERCHIELLI, T. T.; PIRES, A. V.; OLIVEIRA, S. G. (Ed.). Nutrição de ruminates. Jaboticabal: Funep, 2006. 583 p.
WOODS, V. B.; FEARON, A. M. Dietary sources of unsaturated fatty acids for animals and their transfer into meat, milk and eggs: a review. Livestock Science, Foulum, v. 126, n. 1-3, p. 1-20, 2009.
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