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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
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]
Total Authors: 10
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: LIVESTOCK SCIENCE; v. 211, p. 52-60, MAY 2018.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 16/08585-6 - Meat quality of Bos indicus cattle fed with different lipids from pasture- or feedlot-finished
Grantee:Giovani Fiorentini
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 14/09814-3 - Meta-analytical study of responses from addition of lipidic sources in meat quality of beef cattle finished on pasture or feedlot
Grantee:Giovani Fiorentini
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/04758-5 - Development of models for predicting the nutritional requirements of pregnant goats
Grantee:Carla Joice Härter
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 11/00060-8 - GHG full account and mitigation strategies in Brachiaria pastures submitted to different management
Grantee:Telma Teresinha Berchielli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 14/09033-1 - Meta-analysis of the effects of diets with lipid, glycerin and association of both in on rumen fermentation and feed efficiency in beef cattle on pasture or feedlot
Grantee:Juliana Duarte Messana
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/02418-2 - Meta-analytical study of responses from addition of lipidic sources in meat quality of beef cattle finished on pasture or feedlot
Grantee:Giovani Fiorentini
Support Opportunities: Scholarships in Brazil - Post-Doctoral