EFFECT OF PROBIOTICS ON PRODUCTION RESULTS OF BROILER CHICKS

Cilj istraživanja bio je ispitati utjecaj dodatka komercijalnog (Probios®) i pokusnog (kultura L. acidophilus izolirana iz acidofilnog mlijeka, inaktivirani pekarski kvasac, vitamin C i laktoza) probiotičkog preparata putem vode za piće na relevantne proizvodne parametre kod brojlerskih pilića u tovu. Ukupno 105 jednodnevnih pilića provenijencije Cobb 500 podijeljeno je u tri skupine (dvije pokusne i jedna kontrolna). Probiotički tretman obje pokusne skupine pilića provođen je prva tri dana života i trodnevno pri vakcinacijama pilića (dan prije, na dan i dan nakon vakcinacije). Tijekom cijelog pokusnog perioda pilići su hranu i vodu dobivali ad libitum, pri čemu su hranjeni s tri vrste krmnih smjesa (starter, grover i finišer). Korištenje eksperimentalnog i komercijalnog probiotika rezultiralo je na kraju tova od 42 dana povećanjem prosječne tjelesne mase i prirasta te boljom konverzijom hrane. Iskazano kroz vrijednosti proizvodnog indeksa (EPI), najbolje proizvodne rezultate tova ostvarili su pilići tretirani eksperimentalnim probiotikom. Pilići pokusnih skupina ostvarili su veću prosječnu masu obrađenog trupa i bolji randman u odnosu na piliće kontrolne skupine.The aim of this study was to evaluate the effects on relevant production results when commercial (Probios®) and experimental (culture L. acidophilus, inactivate bakery yeast, vitamin C and lactose) probiotic preparation were added to drinking water of broiler chicks during fattening. The experiment was conducted on 105 chicks of the Cobb 500 strain which were divided into three groups (two experimental and one control group) through a 42 days fattening period. Feed and water were offered ad libitum throughout the whole experimental period. The chicks were fed by three kinds of feed mixture (starter, grower and finisher). At the end of the 42 days fattening period it was shown that addition of experimental and commercial probiotics improved the mean body weight, gain of body weight and FCR. The best production index (EPI) was obtained in chicks treated by experimental probiotics. Treatment with experimental and commercial probiotic preparation resulted in increasing of the mean carcass weight and better carcass yield compared to the control group, too