Effects of fatty acid supplements on ruminal and total tract nutrient digestion in lactating dairy cows

Journal of Dairy Science
K J Harvatine, M S Allen

Abstract

Saturated and unsaturated fatty acid supplements (FS) were evaluated for effects on ruminal digestion kinetics, and ruminal and postruminal nutrient digestion. Eight early lactation ruminally and duodenally cannulated cows (77 +/- 12 days in milk, mean +/- SD) were used in a replicated 4 x 4 Latin square design experiment with 21-d periods. Treatments were control and a linear substitution of 2.5% fatty acids from supplemented saturated FS (SAT; prilled, hydrogenated free fatty acids) for partially unsaturated FS (UNS; calcium soaps of long-chain fatty acids). All rations contained identical forage and concentrate components including 37.2% forage and 13.5% cottonseed. Saturated FS linearly decreased ruminal digestibility of dry matter and organic matter and linearly decreased ruminal neutral detergent fiber (NDF) digestibility. The reduction in ruminal NDF digestibility was because of a linear decrease in digestion rate and a linear increase in passage rate of potentially digestible NDF with increasing saturated FS. Total tract digestibility of NDF was not different between treatments because of compensatory postruminal digestion. Ruminal fatty acid and C18 fatty acid digestibility tended to increase linearly with increasing u...Continue Reading

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Mar 2, 2006·Journal of Dairy Science·K J Harvatine, M S Allen

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Citations

Dec 15, 2015·Archives of Animal Nutrition·Yury T Granja-SalcedoTelma T Berchielli
Feb 24, 2009·Journal of Dairy Science·C M KlingermanL Kung
May 1, 2008·Animal : an International Journal of Animal Bioscience·P SchmidelyD Sauvant
Nov 19, 2015·Asian-Australasian Journal of Animal Sciences·Giovani FiorentiniTelma T Berchielli
Jun 4, 2018·Journal of Dairy Science·Dipti W PittaGraeme Attwood
Apr 8, 2020·Animal : an International Journal of Animal Bioscience·V BeaudetC L Girard
Sep 2, 2020·Animal Science Journal = Nihon Chikusan Gakkaihō·Lais S B DiasJosé Esler de Freitas Júnior
Nov 11, 2019·Journal of Dairy Science·A MenschingA R Sharifi
Mar 2, 2006·Journal of Dairy Science·K J Harvatine, M S Allen
Sep 17, 2018·Journal of Dairy Science·E RaffrenatoM E Van Amburgh
Jan 1, 2021·Anaerobe·Kênia Larissa Gomes Carvalho AlvesTelma Teresinha Berchielli

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