The influence of clove leave extract (Syzygium aromaticum) on growth performance and bacterial population of broiler chickens raised in stressful conditions of high stocking density
Broilers maintenance at high stocking density impacts uncomfortable conditions; this increases the potential for stress, reduces feed consumption, and reduces production performance and health in broiler chickens. This study aims to evaluate the effect of clove leaf extract on growth performance and microbial population in the digestive tract of broiler chickens reared at high density. From the eighth day, five treatment groups, T0 (negative control with a typical density of 10 birds/m2), T1 (positive control with a high density of 16 birds/m2), T2, T3, and T4 with a high density of 16 birds/m2, were randomly assigned from 444 broilers (bodyweight of 129.78±0.75 g) with six repetitions each on the eighth day. The feed includes clove leave extract as much as 0.5, 0.75, and 1 ml/kg for T2, T3, and T4, respectively. The weight gain, feed intake, and feed conversion ratio were tracked weekly. One chicken from each replicate was taken randomly, slaughtered, and feathered on day 35. The digesta was taken from the ileum and cecum to measure the intestinal bacterial population and put into a sterile container. Digesta from the duodenum, jejunum, ileum, and cecum were also collected to determine pH levels. MRS agar was used to determine the amount of LAB in the digesta. The findings revealed that giving clove leaf extract of feed to broiler chickens kept at high stocking density could higher body weight gain (P < 0.05), higher feed consumption (P < 0.05), decreased the pH of the ileum and cecum (P < 0.05), increased lactic acid bacteria and decreased coliform bacteria in the ileum and cecum (P < 0.05).
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