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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2014 > Volume 13 Number 9 > Young Researchers and Elite Club, Khorasgan Branch, Islamic Azad University, Isfahan, Iran 1 Department of Animal Science, Khorasgan Branch, Islamic Azad University, Isfahan, Iran

Evaluation the Effects of Dietary Cholecalciferol Substitution with 1alpha-Hydroxycholecalciferol on Performance and Tibia Parameters in Broiler Chickens

Young Researchers and Elite Club, Khorasgan Branch, Islamic Azad University, Isfahan, Iran 1 Department of Animal Science, Khorasgan Branch, Islamic Azad University, Isfahan, Iran
N. Landy and M. Toghyani
Abstract :

This experiment in broiler chickens was conducted to test the efficacy of feeding 1alpha-OH D3 as a replacement for cholecalciferol on performance, tibia quality and severity of tibial dyschondroplasia (TD). On the day of hatch 96 as hatched broiler chickens (Ross-308) were weighted and randomly allocated to two treatment groups, each with 4 replicate pens of 12 chicks. The dietary treatments were as follows: basal diet+5µg/kg of 1alpha-OHD3, or basal diet+5000 IU/kg vitamin D3. The broiler house was completely enclosed and lighting was provided by incandescent bulbs. No significant differences (p>0.05) were observed on daily feed intake, body weight and feed conversion ratio whereas it tended to improve in broilers fed basal diet supplemented with 5µg/kg of 1alpha-OHD3 diet (p>0.05). No significant differences (p>0.05) were found between broilers fed basal diet plus 1alpha-OHD3 or the same basal diet plus cholecalciferol for any of tibia variables measured, whereas it tended to increase in broilers fed basal diet supplemented with 5µ g/kg of 1alpha-OHD3 (p>0.05). Treatments failed to induce any effect on TD scores at d 42, though it tended to increase in broilers fed diets containing 5µg/kg of 1alpha-OHD3 (p>0.05). In conclusion, the results indicate that supplementing 1alpha-OHD3 as a replacement for cholecalciferol could promote performance and tibia parameter and it increased severity of TD, whereas the results were not statistically significant.

Keywords :
Cholecalciferol, 1alpha-hydroxycholecalciferol, performance, tibia parameters, broiler

Date Deposited : 24 Mar 2015 12:03

Last Modified : 24 Mar 2015 12:03

Official URL: http://www.pjbs.org/ijps/ab2538.htm

Volume 13, Number 9, - 2014 , ISSN 1682-8356

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