Authors : A. Plascencia , E.G. Alvarez , H. Davila-Ramos , M.F. Montano , Y.S. Valdes-Garcia and R.A. Zinn
Abstract: Twelve Holstein steers (340�7.2 kg) with cannulas in the rumen and proximal duodenum were used to study the influence of fat titer (36 vs. 41�C) and method of fat inclusion (mixed in a portion of steam flaked corn in the proportion 25% fat and 75% corn, prior to adding other ingredients vs. addition of fat to the mixer as the second-to-last step, just before adding molasses) on characteristics of digestion. The basal diet contained 74.4% steam-flaked corn and 5% supplemental fat. There were no treatment effects (p>0.10) on site and extent of OM, starch, N, lipid and ADF digestion, nor on ruminal VFA molar concentrations. Post-ruminal lipid digestion averaged 69.3%, in close agreement with expected (71%; where fat digestion, % = 83.18-4.52FI-0.68FI3) based on level of fat intake (FI, g kg 1 of body weight).
A. Plascencia , E.G. Alvarez , H. Davila-Ramos , M.F. Montano , Y.S. Valdes-Garcia and R.A. Zinn , 2008. Influence of Fat Titer and Method of Addition on Characteristics of Ruminal and Total Tract Digestion. Journal of Animal and Veterinary Advances, 7: 145-148.