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Abstract
This work was conducted to study the effect of dietary supplementation of some probiotics, Bactocell® and Roemin W2 ®) on body weight development, body gain, relative growth rate, feed conversion ratio, immune response, measuring some blood parameters and carcass traits of broiler chickens.
A total number of 155 one day old Hubbard® chicks were used. The chicks were randomly allocated into 5 equal groups (31 per each) of mixed sex. The broiler chick groups were fed as follows:
Chicks of group 1 were fed on the basal diet without any probiotic supplementation as the control group. While chicks of groups 2 were fed on the basal diet supplemented with Bactocell at 0.5 g / kg diet, the chicks of groups 3 and 4 were fed on the basal diet supplemented with Roemin W2 at 0.5 and 1 g/kg diet respectively. While chicks of groups 5 were fed on the basal diet supplemented with Bactocell and Roemin W2 at 0.5 g / kg diet.
The obtained results can be summarized as follows:
1. There was a non significant increase in the final body weight in broiler chicks of all supplemented probiotic groups when compared with the control group.
2. There was a non significant increase in body weight gain in broiler chicks of group 2 in second weeks which were fed the basal diet supplemented with Bactocell at 0.5 g/kg diet when compared with the broiler chicks of control group. While there was a significant increase in body weight gain in broiler chicks of groups 3, 4 and 5 which fed the basal diet supplemented with Roemin W2 at 0.5 and 1 g/kg diet or both Bactocell and Roemin W2 at 0.5 g/kg when compared with the broiler chicks of control group.
3. There was a numerical increase in the total body weight gain in all supplemented probiotic groups when compared with the control group which fed the basal diet without supplementation.
4. The total feed intake of broilers in probiotic-supplemented groups was higher than those of unsupplemented group.
5. There was no significant difference in average total FCR between all supplemented groups and control one.
6. At the day 33, there was a non significant increase in HI titer to ND in group 5 which were fed the basal diet supplemented with both Bactocell and Roemin W2 at 0.5 g/kg diet when compared with the broiler chicks of groups 3, 4 and control group but significantly increased in group 5 when compared with group 2 which fed the basal diet supplemented with only Bactocell at 0.5 g/kg diet.
7. Supplementation of either Bactocell and/or Roemin W2 significantly increased phagocytic activity in all supplemented groups when compared with control group.
8. Phagocytic index was not affected significantly with probiotic supplementation in all groups when compared with control group.
9. There was insignificant increase in lymphocytes in group fed diet containing Roemin W2 at 0.5 or 1 g/kg diet in groups 3 and 4 but significantly increased in broiler chicks of group 5 which were fed the basal diet supplemented with both Bactocell and Roemin W2 at 0.5 g/kg when compared the broiler chicks of control group.
10. Supplementation of Bactocell at 0.5g/kg diet or both Bactocell and Roemin W2 at 0.5 g/kg diet significantly decreased GOT levels, but addition of Roemin W2 at 0.5 and 1 g/kg diet didn’t affect GOT levels when compared with the control group.
11. The serum cholesterol levels in broiler groups fed diet containing Roemin W2 at 0.5 g/kg and both Bactocell and Roemin W2 at 0.5 g/kg diet significantly increased.
12. There was a significant increase on serum albumin levels in broiler chicks of groups 2, 3 and 4 which were fed basal diet supplemented with Bactocell at 0.5 g/kg diet or Roemin W2 at 0.5 or 1 g/kg diet respectively when compared with the control group.
13. There was a numerical improvement in HB% in chicks of supplemented probiotic groups when compared with the control group
14. There was a numerical improvement in broiler dressing percentage in all groups supplemented with probiotics when compared with control group.
15. Body fat % significantly decreased in broiler chicks of group 2 which fed the basal diet supplemented with Bactocell at 0.5 g/kg diet when compared with the control group.
16. There was no significant difference between treated probiotic group and control group in immune organs.