OPTIMALIZáCIA VZ?AHOV MEDZI VY?IVOU A PROSTREDíM KU PRODUKCII VYKRMOVYCH KUR?IAT THE OPTIMALIZATION OF RELATIONSHIPS BETWEEN NUTRITION AND ENVIROMENT FOR BROILER′S PRODUCTION

摘要

We have examined the probiotic effect of the Enterococcus faecium CECT 4515 on the production growth and health of broiler chickens under conditions of welfare. The animals had a free access to feedstuff and water. The experiment was carried out in 2 cycles on Ross 308 and Cobb 500 broiler types. We have investigated the viability, welfare and the body weight of broiler chickens at the end of each cycle. The breeding was kept according to the terms of welfare. The viability in trial groups (fed with feedstuff enriched with probiotic Enterococcus faecium CECT 4515) was 100%, while in the control groups the viability was 97 % in first cycle carried out on Ross 308 and 98 % in the second cycle carried out on Cobb 500. The average body weight at the end of the first cycle of chickens in the control group was 1376.80 g, while the average body weight at the end of the first cycle of chickens in trial group was 1782.4 g. The difference between these two groups was highly significant (P0.05).