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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2016 > Volume 14 Number 9 > J.A. Giraldo-Carmona , W. Narvaez-Solarte and E.A. Diaz-Lopez 1 1 2

On Top Dose of Vitamin D as the Only Source in the First Week of Broilers

J.A. Giraldo-Carmona , W. Narvaez-Solarte and E.A. Diaz-Lopez 1 1 2
Departamento de Salud Animal, Grupo de Investigacion de Nutricion, 1 Metabolismo y Seguridad Alimentaria, Universidad de Caldas, Manizales, Colombia Departamento de Produccion Agropecuaria, Universidad de Caldas, Manizales, Colombia
Abstract :

The objective of this study was to evaluate the performance of broiler chicks in the first week of age. The study was performed with the inclusion of two vitamin D metabolites as the only source of vitamin D in the broiler’s diet. For this purpose, 308 768-day-old male Ross chicks were used, hosted in 96 pens of 0.36 m each. The experiment consisted of six treatments distributed in a completely randomized block 2 design, in a factorial model of 2 x 3. Two vitamin D metabolites 25-hydroxy cholecalciferol and 1,25- dihydroxycholecalciferol and three levels of inclusion of each metabolite (34.5, 69.0 and 93.5 µg/kg) and (0.5, 1.0 and 1.5 µg/kg), respectively. The experiment was performed with 16 replications per treatment and eight animals per experimental unit. The main parameters of study were: final body weight (BW), average daily feed intake (ADFI), average daily gain (ADG), feed conversion ratio (FCR) and mortality (M). The birds fed with 25-hydroxy cholecalciferol presented a better ADG (p = 0.03) and ADFI (p = 0.00) in contrast to the 1,25- dihydroxycholecalciferol, FC (p = 0.16) and M (p = 0.37) were not affected by the vitamin D metabolite. The use of 34.5 µg/kg of metabolite 25-hydroxy cholecalciferol fed during the first week of life to the broilers show better zootechnical results with respect to 1,25-dihydroxycholecalciferol. This study led to the conclusion that 1,25-dihydroxycholecalciferol is not recommended as the only source of vitamin D when it comes from an herbal source. 

Keywords :
Birds, calcification, cholecalciferol, nutrition, performance

Date Deposited : 05 Jan 2016 09:09

Last Modified : 05 Jan 2016 09:09

Official URL:

Volume 14, Number 9, - 2016 , ISSN 1682-8356

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