THE EFFECT OF COMBINED FEED ADDITIVES ON GROWING PIGS' PERFORMANCE AND DIGESTIVE TRACT PARAMETERS

The aim of the research was to determine the affectivity of 4 different eubiotic preparations on the growth performance of pigs, microbial status, the integrity of intestinal mucosa, and some blood parameters. The experiment was conducted for 28 days on 48 male piglets allocated to six dietary treatments. Group I was offered a diet without eubiotic; 2 - a diet with acids mixture; 3 - phytobiotic, medium-chain fatty acids (MCFA) and yeast; 4- probiotic, MCFA, and yeast; 5 - phytobiotic, probiotic, acids mixture, and sodium butyrate; 6- phytobiotic, probiotic, MCFA, and sodium butyrate. The average daily weight gains and feed intake were recorded. Blood samples, digesta samples, and ilea! tissue samples were collected for studies. 'Mere was no significant difference in gain, feed intake, or FCR among the treatments as well as in the ileal and caecal plI value, microbial content, and total SOFA content in caecal digesta. Ammonia content in ileal digesta was significantly higher in comparison with other groups and in caecal digesta was significantly higher in group 6 in comparison with groups 1 and 2. Villi height was significantly higher (P<0.05) in groups 2, 3 and 6 compared to the control. Vali height to crypt depth ratio was significantly higher (P<0.05) in groups 5 and 2, but the most promising effects seem to be from combinations 3 and 4. In comparison with control: in groups 2, 3 and 5 higher ALT, glucose and triglyceride; in groups 3, 4 and 5 higher total protein and cholesterol; in group 4 higher albumin and in group 6 higher BUN, were found. Generally, used eubiotic preparations affected gut morphology and some blood parameters but did not affect microbiota, pig growth or feed utilization.