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.

EFECTUL ADMINISTRARII DIFERITELOR NIVELE DE VITAMINE SI MINERALE ASUPRA PERFORMANTELOR PUILOR BROILER

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

Rezumat
   Scopul acestei lucrari a fost acela de a vedea posibilitatile de imbunatatire a greutatii corporale si a principalilor parametri de performanta prin cresterea proportiei de vitamine (preponderent in finisare) si seleniu din premixul utilizat. Au fost luati in studiu un numar de 208 pui broiler ROSS 308, acestia fiind impartiti in 13 tarcuri pentru fiecare lot (control si experimental). Furajul administrat a respectat recomandarile nutritionale ale ghidului de crestere, exceptie facand furaj administrat lotului experimental. Acesta a avut un continut mai mare de seleniu si vitamine, in special in faza de finisare. Rezultatele obtinute arata diferente semnificative in ceea ce priveste dinamica greutatii corporale pana la varsta de 14 zile intre lotul de control versus experimental, diferenta ce se reduce odata cu varsta, iar la sacrificare lotul experimental are o greutate mai mare cu 0,79% mai mare. Utilizarea 1,25 hidroxicolicalciferol si cresterea proportiei vitaminei E in toate fazele de crestere si a tuturor vitaminelor in perioada de finisare au determinat reducerea cu 3,3% a FCR si cu 4,4% a EBI si EPEF comparativ cu lotul de control.

Cuvinte cheie: 1,25 hydroxycholecalciferol, vitamina E, vitamina B12, seleniu, broiler