Validation of Urea Dilution to Estimate In Vivo Body Composition in Cattle2

1 April 1987

journal article
Published by Oxford University Press (OUP) in Journal of Animal Science

Vol. 64 (4) , 1024-1030
https://doi.org/10.2527/jas1987.6441024x

Abstract

Urea dilution was validated as an estimator of body composition using two approaches. Urea space was determined in 54 growing Hereford × Angus and Chianina (27 of each type) cattle. Empty body composition (percent water and fat) was determined using carcass specific gravity (CSG). Empty body composition estimated from urea dilution and an independent equation agreed with the composition predicted from CSG (slope = .98, r² = .67, P<.001). Urea space was also evaluated as a biological entity (lean body percentage) using the composition indicated by the regression equations relating urea space to body composition. In both approaches, the observed urea dilution results agreed with the predicted values. It is concluded that urea dilution is a valid estimator of body composition in growing-finishing cattle. Copyright © 1987. American Society of Animal Science . Copyright 1987 by American Society of Animal Science

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