Dietary isoleucine responses in male broiler chickens
- 1 February 2004
- journal article
- research article
- Published by Informa UK Limited in British Poultry Science
- Vol. 45 (1), 67-75
- https://doi.org/10.1080/00071660410001668888
Abstract
1. Three experiments were conducted to measure growth and carcase responses of growing and finishing broilers fed on test diets formulated to be deficient in isoleucine (Ile). 2. Dose titration methodology was used to measure growth and carcase responses of growing and finishing broilers to graduations of Ile in three additional experiments. 3. The experiments were conducted from d 18 to 30, 30 to 42, and 42 to 56. 4. Broilers given Ile-deficient test diets had poorer weight gain, feed conversion and carcase responses than broilers fed on Ile test diets containing a surfeit of Ile. Adding supplemental Ile to the test diet resulted in equivalent growth and carcase responses to those of broilers fed on the control diet with equal Ile from intact protein sources. 5. Recommended total Ile needs varied between 6·7 and 7·1 g/kg from d 18 to 30, 6·4 to 6·6 g/kg from d 30 to 42, and 5·5 to 6·6 g/kg from d 42 to 56.Keywords
This publication has 8 references indexed in Scilit:
- AMINO ACID IMBALANCES, TOXICITIES AND ANTAGONISMSPublished by Oxford University Press (OUP) ,2009
- Ideal ratio (relative to lysine) of tryptophan, threonine, isoleucine, and valine for chicks during the second and third weeks posthatchPoultry Science, 2002
- Limiting Amino Acid Responses in Commercial BroilersJournal of Applied Poultry Research, 2000
- Ideal amino acid profile and dietary lysine specification for broiler chickens of 20 to 40 days of ageBritish Poultry Science, 1999
- Isoleucine requirement of broiler chicks as affected by the concentrations of leucine and valine in practical dietsBritish Poultry Science, 1992
- Isoleucine requirements of the chicken: The effect of excess leucine and valine on the response to isoleucineBritish Poultry Science, 1992
- Dietary Requirements of Leucine, Isoleucine, and Valine in Male Broilers During the Starter PeriodPoultry Science, 1990
- Quantitative Efficacy of Dietary Isoleucine and Valine for Chick Growth as Influenced by Variable Quantities of Excess Dietary LeucinePoultry Science, 1972