אסיף מאגר המחקר החקלאי

Observations on rumen ammonia metabolism in lactating dairy cows

Year:

1980

Source of publication :

Authors :

Volume :

95

Co-Authors:

Oldham, J.D., National Institute for Research, Shinfield, Reading RO2 9AT, Israel
Bruckental, I., The Volcani Center, Institute of Animal Sciences, P.O. Box 6, Bet Dagan, Israel
Nissenbaum, A., The Volcani Center, Institute of Animal Sciences, P.O. Box 6, Bet Dagan, Israel

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Abstract:

A number of attempts have been made, notably by workers in Australia (Nolan, 1975; Pilgrim et al. 1970) and Canada (Mathison & Milligan, 1971; Kennedy & Milligan, 1978a, b) to trace the metabolism of rumen ammonia-N in sheep. In general the diets used were high in forage content and fed at relatively low intake. It may therefore be dangerous to consider their results as general models of rumen-ammonia N metabolism. In particular it may be invalid to extrapolate their findings to the particular case of high-yielding dairy cows fed large quantities of diets containing a relatively high proportion of concentrates. This report contains the results of an exploratory experiment designed to describe the kinetics of rumen ammonia metabolism in lactating dairy cows fed at a moderately high intake. © 1980, Cambridge University Press. All rights reserved.

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