The influence of organic acids and their salts on growth of broiler cockerels of "Ross-308" cross
The article discusses the effect of Presan and Selko pH feed additives, which consist of organic acids added into concentrated feed and drinking water, on live weight of broiler chickens. Totally, six rations were studied: the control group was given antimicrobial medications from 1 to 4 and from 19 to 22 days; as for group 2, in addition to the above scheme, Bacitracin antibiotic was additionally introduced into the feed; Group 3 was given antibiotics in the first two phases of growth, and Presan additive was added to the feed in the given dosages; Group 4 was given antibiotics at the start and growth stage together with Selko pH, and at the finish stage - Selko pH without antibiotics; Group 5 was given antibiotics together with Selko pH at the start and growth stages, and at the finish stage - Selko pH without antibiotics and, additionally, Presan additive in the given dosages was introduced into the feed at all growth phases; Group 6 was given only additives in the established dosages in feed and water, without application of antimicrobial medications at all growth stages. Analysis of the results on growth dynamics of chickens showed changes in growth of chickens at different age periods. At the age of 40 days, the best results were recorded in the 1st, 3rd and 4th groups: 2964.7 g, 2937.0 g and 2942.9 g, respectively. Broilers of the 6th group (2903.8 g) fell slightly behind, receiving feed and drinking