THE EFFECTS OF DIFFERENT LEVEL OF SYNBIOTIC SUPPLEMENTATION IN DIET OF BROILER ON GROWTH PERFORMANCE, INTESTINAL HISTOLOGY AND MICROBIAL COLONY

Document Type : Original Articles

Authors

1 Department of Feeds and Animal Nutrition,Faculty of Agriculture, Department of Animal Science,van,turkey

2 Department of Feeds and Animal Nutrition, Faculty of Agriculture, Department of Animal Science,van,turkey

3 Dept. of Animal Production, College of Agriculture, University of Duhok, Kurdistan Region, Iraq

10.32592/ARI.2024.79.6.1227

Abstract

This study was undertaken to investigate the effect of the supplementation of
different levels of synbiotic on growth performance and intestinal physiology of broiler
chickens. A total of 360-day-old broiler chicks were randomly assigned to 6 different
treatments of 4 replicates, with 15 birds per each replicate. Treatments were control (not
any supplement), (zinc bacitracin 0.04 g/kg), and the remaining four treatments were
supplemented with four different levels (0.25, 0.5, 0.75 and 1 g/kg) of synbiotic to the
basal diets.
At day 10 and throughout the experimental period, body weight and weight gain
significantly were increased (P< 0.05) and feed conversion ratio (FCR) significantly was improved by rising
level of synbiotic. The control group recorded the poorer FCR than other experimental
groups (P<0.05). Up to 10 days, feed intake significantly increased in birds on diets
supplemented with 0.25 and 0.75 g/kg synbiotic. However, when assessed over the 35
days of the experimental period, feed intake significantly decreased (P< 0.05) in birds
that received 0.75g/kg of synbiotic compared to the other experimental groups. The
relative weight of internal organs was not affected by dietary treatments. Carcass yield
and breast meat significantly were increased (P < 0.05) by rising levels of dietary
synbiotic. Villi length was significantly affected by treatment, indicating the longer villi
in birds on diets supplemented with 0.5 g/kg of synbiotic compared to the control.
Significantly the shorter villi were observed in birds that received the highest
supplement (1 g/kg) level of synbiotic. The number of E. coli in the ileum were not
affected by dietary treatments.

Keywords

Main Subjects


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