Effects of nutrition on the conjugated linoleic acid content of milk

dc.contributor.advisorCruywagen, C. W.
dc.contributor.authorLiebenberg, Lindieen_ZA
dc.contributor.otherUniversity of Stellenbosch. Faculty of Agrisciences. Dept. of Animal Sciences.
dc.descriptionThesis (MScAgric (Animal Sciences)--University of Stellenbosch, 2007.
dc.description.abstractThe objective of this investigation was to determine the effect of supplemented conjugated linoleic acid (CLA) on milk production and milk composition of lactating dairy cows in production systems commonly used in South Africa. In the first of three trials, samples of 24 bulk tanks were collected to get an impression of the CLA status of milk in the Western Cape Province, South Africa. Six samples were each collected from Jersey and Holstein herds in total mixed ration (TMR)-based systems. Another six samples were each collected from Jersey and Holstein herds on pasture-based systems. An additional three samples were also collected from co-op silos. One of these came from a mixed herd on TMR, one from a Jersey herd on TMR and the third sample from a mixed herd on pasture. The CLA levels of the milk were within the range reported in literature, albeit on the low side. The mean CLA level in milk fat of cows from pasture and TMR-based systems were 10.5 and 5.45 mg/g of fatty acids, respectively. This is in agreement with trends reported in the literature with cows on pasture having higher levels of CLA in their milk than cows on TMR’s. In this study, breed had no effect on the CLA level in milk fat.en_ZA
dc.format.extent605700 bytesen_ZA
dc.publisherStellenbosch : University of Stellenbosch
dc.subjectDissertations -- Animal sciencesen
dc.subjectTheses -- Animal sciencesen
dc.subjectMilk -- Compositionen
dc.subjectMilk yielden
dc.subjectDairy cattle -- Nutritionen
dc.subjectLinoleic aciden
dc.titleEffects of nutrition on the conjugated linoleic acid content of milken_ZA
dc.rights.holderUniversity of Stellenbosch

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