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Feeding polyunsaturated vegetable oils to lactating cows.

H K Goering·T R Wrenn·L F Edmondson·J R Weyant·D L Wood·J Bitman
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Abstract

Holstein cows fed concentrate:hay diets also were fed for 14 days supplements of soybean oil plus casein, soybean oil protected from ruminal hydrogenation by encapsulation in a casein-formaldehyde matrix, cottonseed oil plus casein, or cottonseed oil protected with casein formaldehyde. The supplements were fed at rates to give a linoleic acid (18:2) intake of 225 g/day. Yields of milk and milk protein were not affected by treatment. Milk 18:2 was not increased by the unprotected soybean oil or cottonseed oil but was increased by protected soybean and cottonseed oil from a control of 2.3 to 5.7% of total milk fat. Milk 18:0 and 18:1 also increased. Compensatory declines were observed in milk 16:0 and 14:0 acids. In fecal fatty acids during the treatment periods, percentage of 18:2 of the total fat decreased and 18:0 markedly increased. These results indicate hydrogenation of the dietary oils in the alimentary tract or a differential absorption. Fecal 16:0 and 14:0 decreased.

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AnimalsCaseinsCattleCholesterolCottonseed OilEnergy MetabolismFatty AcidsFatty Acids, NonesterifiedFemaleLactationMilkMilk ProteinsOilsPregnancyGlycine maxJournal Article

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BibTeXRIS

H K Goering, T R Wrenn, L F Edmondson, J R Weyant, D L Wood, J Bitman. 1977. Feeding polyunsaturated vegetable oils to lactating cows.. https://doi.org/10.3168/jds.s0022-0302(77)83928-3

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