Vliv probiotických krmných aditiv na výživu výkrmových brojlerů

This work deals with the effect of adding feed probiotic additives to the nutrition of broiler chickens. The aim of the work was to determine the effect of probiotic feed additives on the fattening of broiler chickens. The work was processed in the agricultural enterprise ZS Dynín a.s., where the necessary data for comparison were obta-ined. The data were always recorded for each group at the end of fattening and, after the end of fattening, the last group was sorted and compared between the groups without probiotics and the groups to which probiotic additives were presented. In this work, 3 proposals of feed mixtures were fed, which fed broiler chickens. To estimate the survival function, we used a non-parametric estimate of the maximum probability, more specifically we used the Kaplan-Meier estimate, where a higher sur-vival rate of 0.97 was found in the group of chickens that were presented with probiotics and prebiotics. Furthermore, the data were evaluated using a onefactor anova and tukey test, which compared the groups from the average weight of chickens, confiscation, average nutrient conversion and fattening efficiency index. The highest effect of probiotics was found in confiscation and IEV. The fattening efficiency index (IEV) expresses the level of fattening and is characterized mainly by its length, feed consumption per 1 kg live weight, achieved live weight and percentage of chicken deaths