Biomaterial Database

The effect of dietary tryptophan and niacin levels on broiler breeder pullets. 1975

T S Powell, and M H Gehle

A total of 1500 pullets and 300 cockerels were obtained at one-day of age and reared to six weeks on a commercial-type diet. At six weeks of age, birds were fed one of the following: Diets 1, 2 and 3 contained 0.150 percent tryptophan and no added niacin, 28 mg. added niacin and 250 mg. added niacin per kg. of diet, respectively. Diets 4, 5 and 6 contained 0.112 percent tryptophan and no added niacin, 28 mg. added niacin and 280 mg. added niacin per kg. of diet, respectively. All diets contained 2800 kcal. of metabolizable energy per kg. of diet and were fed for 21 weeks. The 0.112 percent tryptophan diets reduced body weight and percent body protein but increased percent body fat. Niacin levels had no effect on any of the pullet production parameters measured. However, at 21 weeks of age 280 mg. of added niacin in the 0.150 percent tryptophan diets restricted body weights of the males.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009539	Nicotinic Acids	2-, 3-, or 4-Pyridinecarboxylic acids. Pyridine derivatives substituted with a carboxy group at the 2-, 3-, or 4-position. The 3-carboxy derivative (NIACIN) is active as a vitamin.	Acids, Nicotinic
D001823	Body Composition	The relative amounts of various components in the body, such as percentage of body fat.	Body Compositions,Composition, Body,Compositions, Body
D001835	Body Weight	The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.	Body Weights,Weight, Body,Weights, Body
D002645	Chickens	Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA.	Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D005260	Female		Females
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D014364	Tryptophan	An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.	Ardeydorm,Ardeytropin,L-Tryptophan,L-Tryptophan-ratiopharm,Levotryptophan,Lyphan,Naturruhe,Optimax,PMS-Tryptophan,Trofan,Tryptacin,Tryptan,Tryptophan Metabolism Alterations,ratio-Tryptophan,L Tryptophan,L Tryptophan ratiopharm,PMS Tryptophan,ratio Tryptophan