The tryptophan requirement of broiler chicks. |
| |
Authors: | C P Freeman |
| |
Affiliation: | Unilever Research Laboratory , Colworth House, Sharnbrook, Bedford, MK44 1LQ, England |
| |
Abstract: | The "available" tryptophan requirements of male and female broiler chicks were determined at 7-d intervals from 0 to 56 d, using a diet-dilution technique. Availability of tryptophan in the diets was estimated by growth assay with chicks. 2. The tryptophan requirements were 2.4 (males) and 2.2 g/kg of diet (female) from 0-7 d, and 1.7 g/kg (males and females) from 7-35 and 35-56 d. The absolute requirement of the chick for tryptophan increased with age and was significantly different for male and female birds. 3. A highly significantly predictive equation relating tryptophan requirement to mean body weight and gain was established. |
| |
Keywords: | |
|
|