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Archivos de medicina veterinaria

versión impresa ISSN 0301-732X

Resumen

DUARTE, CRA et al. Effects of vitamin K3 supplementation on growth performance and bone quality of broiler chickens. Arch. med. vet. [online]. 2014, vol.46, n.2, pp.305-313. ISSN 0301-732X.  http://dx.doi.org/10.4067/S0301-732X2014000200017.

Vitamin K is involved in blood clotting process and plays an important role in bone formation. Thus, this study aimed to evaluate the supplementation of different levels of vitamin K3 on growth performance and bone parameters of broiler chickens. For this purpose, 1,500 broiler chickens were distributed in a completely randomized experimental design. The treatments consisted of a control diet containing 1.6 mg of vitamin K3/kg of diet and 5 levels of vitamin K3 (11.6 mg/kg; 21.6 mg/kg; 41.6 mg/kg, 61.6 mg/kg and 81.6 mg/kg), with 5 replicates and 50 chickens per experimental unit. At 7, 21, and 40 days of age, growth performance (body weight, body weight gain, feed intake and feed:gain ratio) and bone parameters (bone length and diameter, Seedor index and bone strength) were evaluated. The increase in vitamin K3 levels improved the feed intake, body weight and body weight gain in the pre-initial phase. At 40 days old, all performance parameters were similar among the different levels of vitamin K3. At 21 and 40 days of age, bone parameters were impaired as dietary levels of vitamin K3 increased. The results suggest that the recommended level of vitamin K3 in broiler chicken diets is 1.6 mg/kg of diet.

Palabras clave : bone quality; bone strenght; Seedor index; vitamin K.

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