Effects of Milk Intake by Nursing Calves on Forage Intake on Range and Creep Intake and Digestibility in Drylot2

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Abstract
Thirty-five 4- to 6-month-old Charolais-sired calves in drylot and 42 on range nursing Hereford, Hereford × Holstein (Crossbred) and Holstein dams were utilized in two digestion and intake trials (drylot) and one forage intake study (range) to determine the influence of level of milk intake on forage intake and digestibility. Calves in drylot were fed ad libitum creep individually each day while calves on range received none. Holstein progeny consumed more (P<.01) milk and less creep in drylot and less forage cellulose on range than Hereford progeny. No breed differences in cellulose digestibility in drylot were found. Within breed correlation coefficients between milk intake and either creep intake or digestibility were negative for each breed. Milk intake was negatively correlated with forage cellulose intake on range. Creep intake was correlated (P<.01) with cellulose digestibility and with calf weight within each breed. Copyright © 1976. American Society of Animal Science . Copyright 1976 by American Society of Animal Science