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ARS Home » Plains Area » Clay Center, Nebraska » U.S. Meat Animal Research Center » Nutrition, Growth and Physiology » Research » Research Project #437883

Research Project: Mechanisms Associated with Differences in Feed Efficiency of Cattle Fed a Forage Diet

Location: Nutrition, Growth and Physiology

Project Number: 3040-31000-097-004-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Mar 1, 2020
End Date: Feb 28, 2022

Determine if rates of fiber fermentation in the rumen and cecum differs between cattle classified as having greater or least feed efficiency.

Heifers (n= 160) will be fed individually for 84 days and feed intake and body weight gain will be determined. At the end of the feeding period, eight heifers with the greatest ADG and eight heifers with the least ADG within 0.32 standard deviations of the mean feed intake will be selected for subsequent sampling. Selected heifers will be slaughtered, and contents from the rumen and cecum will be used to determine the kinetics of fiber digestion.