Effect on encapsulated liquid smoke in combination with formic acid on intestinal development and microbial counts in broiler

This research aimed to evaluate the effect of a combination between encapsulated coconut shell liquid smoke and formic acid on intestinal development and microflora population in the broiler. This study was carried out with 140 day old chicks (DOC) of strain Cobb allotted to 5 treatments and 4 replications, namely T0= basal feed added without addition of antibiotic, T1= basal feed added with 0.1% zinc bacitracin, T2=basal feed + 0.5% liquid smoke + 0.5% formic acid, T3=basal feed + 1% liquid smoke+0.5% formic acid, and T4=basal feed + 1.5% liquid smoke+0.5% formic acid. The variable of this research consists of length and weight of small intestine, pH and viscosity of ileal, and the total population of microorganism. Data were analyzed using one-way analysis of variance (ANOVA). If the data analyses have a significant effect continued with Duncan's Multiple Range Test (DMRT). The results showed that there was no significant differences (P>0.05) effect of treatment on intestinal development and characteristics, but it significantly increased (P<0.01) Lactobacillus and decreased Salmonella sp population. It can be concluded that the combination of encapsulated coconut shell liquid smoke 1.5 % with 0.5% formic acid in the broiler diet did not affect small intestinal development and characteristics, however improved the population of lactobacillus and decrease Salmonella sp. Based on the results might suggest that the combination of encapsulated liquid smoke and formic acid could be replaced the use of antibiotics in broiler feed.