Butter fatty acid composition as a function of soybean oil supplementation and time of milking, and performance of Holstein x Gyr cows fed with chopped elephant grass-based diets.

Vista sencilla de ítem
dc.contributorFERNANDO CESAR FERRAZ LOPES, CNPGL; Carlos Gustavo Santos Ribeiro, IFB, Planaltina, Brasília; Norberto Mario Rodriguez, UFMG; MARCO ANTONIO SUNDFELD DA GAMA, CNPGL; MIRTON JOSE FROTA MORENZ, CNPGL; ROSEMAR ANTONIASSI, CTAA; HUMBERTO RIBEIRO BIZZO, CTAA.
dc.creatorLOPES, F. C. F.
dc.creatorRIBEIRO, C. G. S.
dc.creatorRODRIGUEZ, N. M.
dc.creatorGAMA, M. A. S. da
dc.creatorMORENZ, M. J. F.
dc.creatorANTONIASSI, R.
dc.creatorBIZZO, H. R.
dc.date2019-09-03T19:10:14Z
dc.date2019-09-03T19:10:14Z
dc.date2019-09-02
dc.date2019
dc.date2020-01-03T11:11:11Z
dc.date.accessioned2026-07-07T03:47:25Z
dc.descriptionThe aim of this study was to evaluate the performance of cows fed with a total mixed ration composed of elephant grass and a concentrate containing 0.0% (control), 1.5%, 3.0% or 4.5% soybean oil on a dry matter basis. The effect of milking time (morning versus afternoon) on butter fatty acid composition was also evaluated. Twelve multiparous Holstein x Gyr cows with an average milk production of 18.0±4.6 kg day-1 and 90±25 days in milk were used in a triplicated 4 x 4 Latin square experimental design with 15-day periods. Data were analyzed using mixed models. There was no effect of soybean oil supplementation on dry matter or neutral detergent fiber intake (P > 0.05). The fat-corrected milk yield linearly decreased (P=0.0109) and the milk protein yield linearly increased (P=0.0023) in response to soybean oil supplementation. The butterfat trans-9 C18:1, cis-9 C18:1, trans-10 C18:1, trans-11 C18:1, cis-9, trans-11 CLA and trans-10, cis-12 CLA content linearly increased (P < 0.05), whereas the C12:0, C14:0 and C16:0 content linearly decreased (P < 0.001) as the level of soybean oil in the diet increased. The butter produced from afternoon milk had a lower content of C16:0 and a higher content of cis-9 C18:1 (P < 0.05). The supplementation of elephant grass-based-diets with soybean oil and, to a small extent, the selective segregation of milk obtained from afternoon milking sessions are strategies that can be used to improve the fatty acid composition of butterfat.
dc.identifierSemina: Ciências Agrárias, Londrina, v. 40, n. 5, p. 2027-2044, set./out. 2019.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1111818
dc.identifier10.5433/1679-0359.2019v40n5p2027
dc.identifier.urihttp://hdl.handle.net/123456789/442941
dc.languageeng
dc.rightsopenAccess
dc.subjectPennisetum Purpureum
dc.subjectConjugated linoleic acid
dc.subjectMilk composition
dc.titleButter fatty acid composition as a function of soybean oil supplementation and time of milking, and performance of Holstein x Gyr cows fed with chopped elephant grass-based diets.
dc.typeArtigo de periódico

Archivos

Colecciones

Embrapa Vacas Lecheras (CNPGL)