Title page for ETD etd-08012012-040422


Type of Document Master's Thesis
Author Wampler, Susan Anderson
URN etd-08012012-040422
Title Preference and acceptability of four protein sources by ruminating Holstein calves
Degree Master of Science
Department Dairy Science
Advisory Committee
Advisor Name Title
Polan, Carl E. Committee Chair
Barnes, Michael A. Committee Member
Siegel, Paul B. Committee Member
Keywords
  • Cattle
Date of Defense 1988-05-22
Availability restricted
Abstract
Four successive groups of four calves each (~ 4 mo old) were individually penned and observed

during a 14 d trial period for choice of concentrate. Prior calf diets contained soybean meal (SBM)

(for two groups and distillers grains in place of SBM for two groups. Concentrates contained approximately equal amounts of corn with either SBM, peanut meal (PNM), fish meal (FSM), or

corn gluten meal (CGM). Each day of four trials, .45 kg of each concentrate was randomly assigned

to one of four equal feed box sections. Calf feeding position was recorded every 30 sec for no more

than 50 min or until calves stopped eating. In addition, 1.36 kg of first cutting orchardgrass hay

was offered twice per day. Measurements of amount of each feed consumed, order of consumption

and length of time spent eating each feed were analyzed statistically to determine preference.

Overall preference was for SBM, closely followed by PNM, both over FSM and CGM, with the

l preference status of FSM showing the most change over time by decreasing throughout the trial

periods. Neither section in which feed was offered nor previous experience with SBM significantly

influenced preference. In addition, twenty calves ranging in age from 4 mo to 7 mo were divided

and housed in four groups of five and observed during a 30 d trial period for acceptability of the

protein feeds tested for preference. Acceptability, measured subjectively as length of time required

by calves to eat each feed, was greatest for SBM, closely followed by PNM and CGM, and least

for FSM. Analysis of calf weight gain showed no differences between feeds.

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