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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Effect of lipid sources on fatty acid profiles of meat from pasture- and feedlot-finished Nellore bulls

Texto completo
Autor(es):
Fiorentini, G. [1] ; Santana, M. O. [1] ; Messana, J. D. [1] ; Valente, A. L. S. [1] ; Harter, C. J. [1] ; Rabelo, C. H. S. [1] ; Barbero, R. P. [1] ; Lanna, D. P. D. [2] ; Reis, R. A. [1, 3] ; Berchielli, T. T. [1, 3]
Número total de Autores: 10
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista, UNESP, Dept Anim Sci, Campus Jaboticabal, BR-14884900 Jaboticabal, SP - Brazil
[2] Univ Sao Paulo, ESALQ, Anim Sci Dept, BR-13418900 Piracicaba - Brazil
[3] Univ Fed Vicosa, INCT CA, Dept Anim Sci, S-N Campus Univ, Av Peter Henry Rolfs, BR-36570000 Vicosa, MG - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: LIVESTOCK SCIENCE; v. 211, p. 52-60, MAY 2018.
Citações Web of Science: 0
Resumo

We aimed to compare the influence of two lipid sources (soybean grain {[}SG], and protected fat {[}PF, Lactoplus], based on soybean oil) with a control diet (no lipid supplementation) on the fatty acid (FA) profile (longissimus muscle and subcutaneous fat) of beef cattle finished on grazing pasture or at a feedlot, The study was arranged in a complete randomized design, using 2 x 3 factorial scheme that combined 2 finishing systems and 3 diets. Seventy-eight young Nellore bulls (323.8 +/- 25.4 kg body weight {[}BW] and 21 +/- 3 months of age) were divided at random into two finishing systems: 1) pasture-finishing and 2) feedlot-finishing. The diet containing PF increased CLA in the muscle (P = 0.0002). Pasture-finished bulls fed lipid-supplemented diets had significantly more (P = < 0.0001) subcutaneous saturated fatty acids and polyunsaturated fatty acids (PUFA) in muscle, whereas the PUFA concentration of PF-fed bulls was highest (P = < 0.0001) in subcutaneous fat. The highest (P = 0.0090) concentration of Omega-6 (n6) was observed in the muscle tissue of pasture-finished animals supplemented with SG. However, the lowest concentration (P = 0.0010) of n6 FAs in subcutaneous fat was more evident in pasture-finished animals receiving the control diet. The concentration of C20:5 n3 (EPA) was significantly higher (P = 0.040) in the muscle tissue of animals receiving the control diet in pasture and deposition of EPA was greater (P = 0.0020) in the subcutaneous fat of pasture-finished animals. The highest concentrations (P = < 0.0001) of n3 were observed in the muscle tissue of pasture-finished animals, Animals receiving the control diet in both finishing systems had a lower (P = 0.0051) n6:n3 ratio in muscle tissue. By comparison, feedlot-finished animals showed a higher (P < 0.01) n6:n3 ratio in muscle tissue, and the highest (P = 0.0190) n6:n3 ratio in subcutaneous fat was observed in pasture- and feedlot-finished animals supplemented with PF compared to the control diet. The muscle and subcutaneous fat tissues of feedlot-finished bulls fed the control and SG diets had a significantly higher (P < 0.05) Delta(9)-desaturase C16 index. The lowest (P = 0.0010) elongase concentrations were observed in the muscle tissue of PF-fed bulls, regardless of finishing system. Overall, bulls finished on grazing pasture had a more desirable FA composition. (AU)

Processo FAPESP: 16/08585-6 - Qualidade da carne de bovinos Bos indicus alimentados com diferentes fontes lipídicas terminados em pastagem ou confinamento
Beneficiário:Giovani Fiorentini
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
Processo FAPESP: 14/09814-3 - Estudo meta-analítico das respostas da adição de fontes lipídicas na qualidade da carne de bovinos de corte terminados em pasto ou confinamento
Beneficiário:Giovani Fiorentini
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
Processo FAPESP: 13/04758-5 - Desenvolvimento de modelos para predição das exigências nutricionais de cabras gestantes
Beneficiário:Carla Joice Härter
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 11/00060-8 - Balanço de gases de efeito estufa e estratégias de mitigação em pastos de Brachiaria submetidos a diferentes manejos
Beneficiário:Telma Teresinha Berchielli
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 14/09033-1 - Meta-análise dos efeitos de dietas com lipídios, glicerina e da associação de ambos na fermentação ruminal e eficiência alimentar de bovinos de corte em pasto ou confinamento
Beneficiário:Juliana Duarte Messana
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 13/02418-2 - Estudo meta-analítico das respostas da adição de fontes lipídicas na qualidade da carne de bovinos de corte terminados em pasto ou confinamento
Beneficiário:Giovani Fiorentini
Linha de fomento: Bolsas no Brasil - Pós-Doutorado