The effect of some poultry probiotics produced in Iran on performance parameters, economic indices and small intestinal morphology of broilers

Document Type : Research Paper


1 M. Sc. Student, Department of Poultry Breeding and Management, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

2 Associate Professor, Department of Poultry Breeding and Management, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

3 Assistant Professor, Department of Poultry Breeding and Management, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

4 Associate Professor, Department of Biotechnology, Razi Vaccine Research Institute, Agricultural Research and Education Organization, Karaj, Iran


This experiment was conducted to compare the effect of some poultry probiotics produced in Iran on performance parameters, economic indicators and small intestinal morphology of broilers using 500 one-day-old Ross 308 broilers in a completely randomized design with 5 treatments and 5 replicates per each treatment. The experimental treatments were: 1- basal diet (control), 2- basal diet + Bacto-Gene® probiotic, 3- basal diet + Di-Pro® probiotic, 4- basal diet + Hypro-Tect® probiotic and 5- basal diet + Probitaz® probiotic. At 24 and 41 days of age, one male broiler chick was slaughtered from each experimental unit. Orthogonal contrasts were done to compare the effect of probiotics versus control. The results of this study showed that the treatments containing probiotic had no significant effect on body weight gain and feed conversion ratio. The utilization of probiotic Hypro-Tect® resulted in significant reduction in feed consumption in whole experimental period compare to other treatments containing probiotic (P≤0.05). The final body weight, European efficiency factor, economic indices and carcass percentage were not affected by experimental treatments. The utilization of probiotics had no significant effect on intestinal relative length and morphological indices of jejunum and ileum. In orthogonal contrast, the utilization of treatments containing probiotic increased feed cost as compared to control group (P<0.05). According to the results of this study, it seems that the utilization of studied probiotics had no significant effect on performance parameters, economic indices and small intestinal morphology of broilers reared in optimal condition as compared to control group.


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