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5.2 Alternative Systems for Assessing the Nitrogen Value of Feeds for Ruminants

Published online by Cambridge University Press:  27 February 2018

J. L. Black ,
G. J. Faichney ,
D. E. Beever  and
B. R. Howarth
J. L. Black
Affiliation:
C.S.I.R.O., Division of Animal Production, P.O. Box 239, Blacktown, N.S.W., 2148, Australia
G. J. Faichney
Affiliation:
C.S.I.R.O., Division of Animal Production, P.O. Box 239, Blacktown, N.S.W., 2148, Australia
D. E. Beever
Affiliation:
Grassland Research Institute, Hurley, Maidenhead, Berkshire, England
B. R. Howarth
Affiliation:
New South Wales Institute of Technology, Broadway, 2007, Australia
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Extract

Systems suitable for evaluating the nitrogen status of feeds for ruminants must consider (i) the requirements of the animal's tissues for nitrogenous substances, (ii) the amount and nature of the nitrogenous substances absorbed by the animal and (iii) the efficiency with which absorbed nitrogen is used for various body functions. Such systems must also include aspects of energy utilization because, in ruminants, both the tissue needs for nitrogen and the flow of protein to the intestines are affected by energy availability. Several systems which attempt to include all three considerations in more or less detail have recently been proposed (Burroughs, Nelson and Mertens, 1975; Satter and Roffler, 1975, 1977; Kaufmann, 1977; Jarrige, Journet and Vérité, 1978; Fox, Sniffen, Van Soest and Robinson, 1979; Agricultural Research Council (ARC), 1980; Chalupa, 1980).

Type
5. Systems for Assessing the Nitrogen Value of Feeds for Ruminants
Information
BSAP Occasional Publication , Volume 6: Forage Protein in Ruminant Animal Production , 1982 , pp. 107 - 118
Copyright
Copyright © British Society of Animal Production 1982

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References

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