Evaluation of tibial dyschondroplasia development in broiler chickens fed diets containing 25 hydroxicolecalciferol
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2012-12-01
Autores
Ponso, Roselaine
de Faria, Douglas Emygdio
de Albuquerque, Ricardo
Paz, Ibiara Correia de Lima Almeida
Artoni, Silvana Martinez Baraldi [UNESP]
dos Santos, Andréa Luciana
Saviani, Gisele
de Araújo, Cintia Maria Monteiro
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Resumo
This research was carried out to evaluate the development of tibial dyschondroplasia (TD) in broilers from 1 to 21 days. Four hundred forty day-old male chickens, from broiler breeders aged 60-62 weeks, were randomly distributed in a 3×3+2 factorial arrangement, resulting in 11 treatments with four replicates of 10 birds each. The factors evaluated were: bird strains (Ross 308, Cobb 500, and Hybro), levels and sources of vitamin D (1250UI D3/kg without 25-(OH)D3; 1250UI D3/kg with 69mg 25-(OH)D3/ton, and 3000UI D3/kg with 69mg 25-(OH)D3/ton), and two control treatments containing calcium and phosphorus levels with 3000UI D3/kg without 25-(OH)D3 and 3000UI D3/kg with 69mg 25- (OH)D3/ton of feed. Bone characteristics were evaluated. From 1 to 21 days, the results showed that bone calcium and phosphorus concentrations were not influenced by the treatments, however, feed intake was higher for factorial than control treatments. Bone breaking resistance was not influenced by the treatments and there were no typical lesions of TD. In conclusion, it was not observed TD development in broilers from 1 to 21 days according to experimental procedures of this research.
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Broiler chickens, Growth plate, Tibial Dyschondroplasia, Aves, Gallus gallus
Como citar
Brazilian Journal of Veterinary Research and Animal Science, v. 49, n. 2, p. 153-161, 2012.