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Response of dairy cows to compounds varying in level and profile of undegradable essential amino acids

Published online by Cambridge University Press:  21 November 2017

P.J. Strachan ,
J.S. Wilson  and
N.C. Kelly
P.J. Strachan
Affiliation:
Unilever Research Laboratory, Colworth House, Sharnbrook, Bedford, MK44 1LQ
J.S. Wilson
Affiliation:
Unilever Research Laboratory, Colworth House, Sharnbrook, Bedford, MK44 1LQ
N.C. Kelly
Affiliation:
BOCM Silcock, Basing View, Basingstoke, Hampshire, RG21 2EQ
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Extract

The Agricultural Research Council (1980, 1984) protein recommendation for dairy cows was designed to ensure that total amino acid nitrogen (TAA-N) entering the duodenum is sufficient to provide TAA-N for production. Essential amino acid (EAA) supply and demand, although recognised as important, was not an integral part of the scheme.

These trials were designed to test the feasibility and efficacy of formulating compound feeds to complement and improve the duodenal EAA supply from the basal diet of lactating cows.

The experimental aim was to formulate compound feeds on the basis of undegradable EAA (UEAA), to compare the performance of dairy cows fed these rations and to relate performance to measurements of nutrient supply to the duodenum. The trials took the form of two production trials (years 1 and 2) and one digestibility trial (year 2). Estimates of the supply of EAA to the duodenum were obtained by in vivo measurements in cannulated cows (year 2).

Type
Dairy Production
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1987 , March 1987 , pp. 113 - 114
Copyright
Copyright © The British Society of Animal Production 1987

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References

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