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Abstract
This work was conducted to study the effect of dietary supplementation of some probiotics, (yeast groups) Zimoferment and Bio Buds and (bacterial groups) Bioplus 2B and Samu Biogen on body weight development, body gain, relative growth rate, feed conversion ratio, protein efficiency ratio, performance index, immune response, measuring some blood parameters carcass traits and economic efficiency of broiler chickens.
A total number of 294 one- day-old chicks were used. The chicks were randomly allocated into 7 equal groups (42 per each) of mixed sex. The broiler chicks 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 and 3 were fed on the basal diet supplemented with Zimoferment at 1.25 and 2.5 g / kg diet, the chicks of groups 4 and 5 were fed on the basal diet supplemented with Bio Buds at 0.5 and 1 g/kg diet. While chicks of groups 6 and 7 were fed on the basal diet supplemented with Bioplus 2B and Samu Biogen at 1 and 0.3g / kg diet, respectively.
The obtained results can be summarized as follows:
1. Body weight development was significantly improved during the 4th weeks in chicks of groups 5 and 6 which were supplemented with probiotics. While the final body weight showed numerical increase in chicks of groups 5, 2, 7 and 6.
2. There was insignificant increase in total body weight gain in chicks of groups 5, 2, 7 and 6, respectively.
3. Insignificant increase was detected in chicks of group 2 in total relative growth rate when compared with those of the control group.
4. Final feed conversion ratio was better in chicks of groups 7 and 5 when compared with those of the control group.
5. Chicks of groups 5 and 7 showed a significant increase in protein efficiency ratio in the first week of experiment. But total PER showed insignificant improvement in chicks of groups 7, 5, 2 and 4 when compared with those of the control group.
6. There was significant increase (p<0.05) in performance index in chicks of groups 5 and 7 when compared with the control group in first week of the experiment. Concerning total PI there was insignificant improvement in chicks of groups 7, 5, 2, 4, 6 and 3.
7. There was significant increase in HI titer at 24 days of age in chicks of groups 4 and 5. While at 42 days, HI titer increased significantly in chicks of groups 5 and 7.
8. Chicks of all treated groups showed insignificant increase in WBCs count except those of group 3 when compared with the control group. There was a significant increase in lymphocytes % in chicks of groups 7 and 5. Insignificant increase was detected in monocytes count in chicks of all treated groups when compared with the control group.
9. There was a significant increase in phagocytic activity in chicks of groups 2, 5 and 6, while all treated groups except those of 5 and 4 showed insignificant increase in phagocytic index when compared with those of the control group.
10. There was insignificant increase in serum total protein in chicks of groups 3, 7 and 5. Also, insignificant increase in serum albumin in chicks of groups 3 and 5, insignificant increase in serum globulin in chicks of all treated groups except those of group 4 when compared with those of the control group.
11. Insignificant decrease in serum cholesterol content was noticed in all treated groups supplemented by probiotics. Chicks of group 6 showed a significant decrease in triglycerides content, but other groups showed insignificant decrease except those of groups 7 and 4 when compared with control group.
12. There was a significant decrease in creatinine levels in chicks of all treated groups except those of group 7.
13. There was a decrease in serum GOT, GPT and alkaline phosphatase levels in chicks of groups fed on diet containing probiotic, when compared with those of the control group. Concerning serum glucose level, there was an increase in chicks of groups 7, 6, 5, 3 and 2 when compared with those of the control group.
14. There was a significant increase in RBCs count in chicks of groups 6 and 5. Concerning HB% chicks of group 7 showed a significant difference when compared with those of the control group.
15. Chicks of group 2 showed a significant increase in PCV when compared with those of the control group.
16. There was insignificant increase in dressing percentage in chicks of groups 6 and 2 when compared with those of the control group. Groups 4, 6 and 5 showed significant decrease in heart % when compared with those of the control group. There was insignificant decrease in gizzard % in chicks of groups 7, 4, 6 and 2.
17. Chicks of all treated groups except those of group 7 showed insignificant decrease in visible fat percentage when compared with those of the group.
18. There was insignificant decrease in spleen % in chicks of groups 7, 4 and 2. Significant increase in thymus % in chicks of groups 7, 6 and 3. All treated groups showed insignificant difference in bursa and liver % when compared with those of the control group
19. The results of economic efficiency indicated that chicks of groups 5, 7, 6 and 2 were more efficient than those of the control group.