Efficiency of protein utilization in male and female broiler chickens

Title
Efficiency of protein utilization in male and female broiler chickens
Publication Date
2002
Author(s)
Li, Lily
Nolan, John Vivian
( author )
OrcID: https://orcid.org/0000-0001-7949-950X
Email: jnolan@une.edu.au
UNE Id une-id:jnolan
Editor
Editor(s): RAE Pym
Type of document
Conference Publication
Language
en
Entity Type
Publication
Publisher
University of Sydney, Poultry Research Foundation
Place of publication
Sydney, Australia
UNE publication id
une:4522
Abstract
The efficiency of dietary protein utilisation in broiler chickens was studied by conventional balance techniques and by digestion and metabolism of ¹⁵N-labelled protein in the diet. Between 16 and 30 days of age, male chickens tended to be heavier and to ingest more feed than female chickens: however, female chickens tended to absorb and utilize dietary protein more efficiently than male chickens. Whole-body synthesis rate did not differ between sexes and was 6.7-7.5 times the protein absorption rate. Only about 10% of the protein synthesized was deposited in tissue gain whereas 90% was degraded. Fractional protein synthesis rates were determined from the decline in enrichment in small intestinal, liver and breast muscle samples taken sequentially from birds that had earlier ingested ¹⁵N-labelled feed. FSRs declined with age but did not differ between sexes and were 44-52, 23-29 and 15-18 %/d, respectively.
Link
Citation
Proceedings of the Australian Poultry Science Symposium, v.14, p. 175-178
ISSN
1034-6260
1034-3466
Start page
175
End page
178

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