Lenuta Fotea


THE EFFECT OF ESSENTIAL OIL OF ROSEMARY (ROSMARINUS OFFICINALIS) ON TO THE BROILERS GROWING PERFORMANCE

Lenuta Fotea, Elena Costachescu, G. Hoha

Abstract
In recent years medicinal plants have been studied from the perspective of their use as growth promoters and replacement of antibiotics. The aim of the research was to determine the effect of different levels of oil on growth and development, increase of weight gain and feed conversion to increase growth, water consumption and sustainability of chicken meat. Were used 250 broiler chicken Ross 308 distributed in five lots, L1 (0.1%), L2 (0.5%), L3 (1%) L4 (1.5%) and M (0.3% avilamycin). The experiment during 42 days. The data obtained were statistically processed. For the average body weight and growth rate the best values were recorded in the lot with antibiotic and in the lot with 0.5% oil, being higher with 2.43% (L1), 4.97% (L3), and 5.9% (L4), feed conversion in growth rate was approximately the same for lots M, L1, L3, and L4, the values recorded were different depending on the level and type of additive used, the best results were recorded in the lot L2 being higher by about 5% compared with M. The best values for water consumption were recorded in the lot L2 with 6.39% higher compared to the lot M. The lowest values of mortality percentage were recorded in the L2. In conclusion, the level of 0.5% essential oil of rosemary can be considered a possible natural growth promoter for chicken broilers.

Key words: essential oil, alternatives, antibiotics, natural, broilers

EFECTUL UTILIZARII ULEIULUI ESENTIAL DE ROZMARIN (ROSMARINUS OFFICINALIS) ASUPRA PERFORMANTELOR DE CRESTERE A PUILOR DE CARNE

Lenuta Fotea, Elena Costachescu, G. Hoha

Rezumat
Īn ultimi ani plantele medicinale au fost studiate din perspectiva utilizarii lor ca biostimulatori de crestere si īnlocuitori ai antibioticelor. Scopul cercetarilor a fost de a stabili efectul diferitelor nivele de ulei asupra cresterii si dezvoltarii, sporului de crestere īn greutate si conversiei hranei īn sporul de crestere, consumul de apa si viabilitatii puilor de carne. Au fost folosti 250 de pui broiler Ross 308 distribuiti īn cinci loturi, L1 (0,1 %), L2 (0,5 %), L3 (1 %) L4 (1,5 %) si M (0,3 % avilamycin). Experimentul a durat 42 de zile. Datele obtinute au fost prelucrate statistic. Pentru greutatea corporala medie si sporul de crestere valorile cele mai bune au fost īnregistrate la lotul cu antibiotic si lotul cu 0,5 % ulei, fiind mai mari cu 2,43 % (L1), 4,97 % (L3), si 5,9 % (L4); conversia hranei īn sporul de crestere a fost aproximativ la fel pentru loturile M, L1, L3, L4 iar valorile īnregistrate au diferit īn functie de nivelul si tipul de aditiv folosit, cele mai bune rezultate au fost īnregistrate la lotul L2 fiind mai mari cu aproximativ 5 % comparativ cu lotul M. Pentru consumul de apa valorile cele mai bune au fost īnregistrate la lotul L2 cu 6,39 % mai mici comparativ cu lotul M. Cele mai mici valori ale procentului de mortalitate au fost īnregistrate la lotul L2. Īn concluzie nivelul de 0,5% ulei esential de rozmarin poate fi considerat un posibil biostimulator de crestere natural pentru puii de carne.

Cuvinte cheie: ulei esential, alternative, antibiotice, natural, brioileri