EFFECTS OF DIFFERENT DIETARY LEVELS OF VITAMINS AND OLIGOELEMENTS ON BROILERS PERFORMANCE

Roxana Zaharia, Nicoleta Daniela Frunza, I.M. Pop, Cristina Radu-Rusu, Alina Narcisa Postolache

Abstract
   The aim of this paper was to see the possibilities of improving body weight and the main performance parameters by increasing the proportion of vitamins (mainly in finisher) and selenium in the used premix. A total of 208 ROSS 308 broiler chicken were studied and divided into 13 pens per each batch (control and experimental). The administered feed complied with the nutritional recommendations of the growth guide, with the exception of feed administered to the experimental batch. The latter had a higher content of selenium and vitamins, especially in the finisher phase. The end results show significant differences in terms of body weight dynamics up to the age of 14 days between the control batch and the experimental one. The difference decreases with age, and upon slaughter the experimental batch has a weight higher by 0.79%. The use of 1,25 hydroxycholecalciferol and the increase in the proportion of vitamin E in all growth phases and all vitamins in the finisher period determined a reduction by 3.3% of FCR and by 4.4% of EBI and EPEF compared to the control batch.