Group Title: Tissue protein and energy deposition in steers fed diets with different urea fermentation potentials (UFP) /
Title: Tissue protein and energy deposition in steers fed diets with different urea fermentation potentials (UFP)
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Permanent Link: http://ufdc.ufl.edu/UF00097446/00001
 Material Information
Title: Tissue protein and energy deposition in steers fed diets with different urea fermentation potentials (UFP)
Physical Description: ix, 116 leaves : ill. ; 28 cm.
Language: English
Creator: Tritschler, Joseph Patrick, 1950- ( Dissertant )
Shirley, R. L. ( Thesis advisor )
Bertrand, J. E. ( Reviewer )
Palmer, A. E. ( Reviewer )
Smith, P. H. ( Reviewer )
Lutrick, M. C. ( Reviewer )
Easley, J. F. ( Reviewer )
Fry, Jack L. ( Degree grantor )
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 1981
Copyright Date: 1981
 Subjects
Subjects / Keywords: Urea as feed   ( lcsh )
Animal Science thesis Ph. D
Beef cattle -- Feeding and feeds   ( lcsh )
Dissertations, Academic -- Animal Science -- UF
Genre: bibliography   ( marcgt )
non-fiction   ( marcgt )
 Notes
Abstract: A 5 X 5 Latin square metabolism trial and a comparative slaughter feedlot trial were conducted with 85 British type steers to evaluate diets with various urea fermentation potentials (UFP). With increasing dietary nitrogen, UFP values were calculated to be +3.8, +1.2, -l.A, -3.9 and -6.9 g urea per kg diet. The dietary metabolizable protein (MP) levels were determined to be 69.2, 76.6, 80. 1 , 8O.8 and 8O.O g per kg diet, respectively. Crude protein digestibility increased with decreasing UFP values (P <.005), but TDN, DE and ME showed no siginificant relationship to variation in UFP. While NEm was not significantly related to UFP, feed efficiency improved and NE increased logarithmically (P < .05) with decreasing dietary UFP levels. Average daily gain, DM intake, ME intake and energy balance were parabolically related (P < .005) to dietary UFP levels. Optimal feedlot performance and energy utilization were observed at -1.^ to -3-9 UFP, which corresponded to maximum dietary MP concentration. Carcass specific gravity was utilized to determine empty body fat and protein. Daily gains in empty body weight, fat and energy were parabolically related (P < .001) to dietary UFP levels. Optimal empty body gains were also observed to occur between -1.4 and -3.9 UFP levels. Empty body protein gain per day increased logarithmically (?<.05) with decreasing dietary UFP levels. Carcass characteristics followed similar parabolic patterns with changes in dietary UFP. Their respective maxima and minima suggested that an increased degree of carcass finish occurred with increased dietary MP concentration. V/h i 1 e the MP system has merit with respect to predicting animal performance, it overestimated NP available for protein gained in tissues over g the 119-126 day feedlot trial. While predicted NP ranged from I96 to 283 g per day, observed tissue protein gains ranged from 62 to 109. This suggested that only about one third of the predicted NP was actually deposited in tissues.
Thesis: Thesis (Ph. D.)--University of Florida, 1981.
Bibliography: Bibliography: leaves 100-115.
Additional Physical Form: Also available on World Wide Web
Statement of Responsibility: by Joseph Patrick Tritschler II.
General Note: Typescript.
General Note: Vita.
 Record Information
Bibliographic ID: UF00097446
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: alephbibnum - 000295966
oclc - 07991414
notis - ABS2319

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