| Titles |
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English :
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Impact of prebiotic, probiotic and competitive exclusion on growth performance and microbiota of broiler chicks
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| Abstract |
This study was initiated with the aim of comparing the growth performance and the change in gastro-intestinal tract microbiota of Ross broiler chicks that maintained on a single or a combined contribution of oligosaccharides-prebiotic and two forms of probiotics; a commercial probiotic preparation or self developed undefined anaerobic culture isolated from the digestive tract of adult healthy broilers (competitive exclusion; CE), according to the following regime: the control group was fed on the basal diet (group 1), while, the other five experimental groups were provided with gluco-oligosaccharides (GOS; 1.0 kg/ton feed), as a source of a prebiotic (group 2), commercial Bacillus culture (1.0 kg/ton feed); composed of Bacillus lichenoformis (4 x 1010 cfu/g) and
Bacillus subtilis (4 x 10 10 cfu/g); as a source of probiotic product (group 3), oral gavage with 1 ml solution containing 5 x 1010 cfu/ml of the anaerobic culture/chick administrated at day 3 post-hatch (CE; group 4),a combination of the prebiotic (1.0 kg/ton feed) and commercial probiotic (1.0 kg/ton feed) (group 5) and, finally, a combination of the prebiotic (1.0 kg/ton feed) and oral gavage with 1 ml containing 5 x 1010 cfu/ml of the anaerobic culture/chick administrated at day 3 post-hatch (GOS+CE; group 6). Chicks, feed, and water, were tested to be set free of salmonellosis. The experimental trial lasted to 40 days of age, and was performed using 180 chicks, distributed equally among the six
treatments, with three replicate cages, each of 10 chicks,. Broiler chicks were kept under the same managerial procedures throughout the growth trial term, following the Ross-308 strain-catalogue guidelines. Results obtained indicate that treated groups displayed clear positive effects in most studied variables compared to the control, especially in the two groups that had been inoculated with the undefined anaerobic culture. Broilers of these two treatments
(CE and GOS+CE), significantly, grew faster and showed better feed conversion ratio, especially during the starter and total period phases of the study. While, the control group showed the highest significant total feed intake, but only against the Bacillus fed groups. Again, the CE and GOS+CE groups significantly had extraordinary increase in the total count of the beneficial anaerobic bacteria in both the duodenum and cecum that was simultaneously associated with a significant decrease in the total aerobic count in the duodenum, cecum and colon. Hot carcass, liver or abdominal fat percentages were not significantly differed between treatments.
It could be concluded that application of competitive exclusion technique, only once in the early life of hatched chicks, is a promising procedure to sustain the performance in terms of improved growth performance, while maintaining the gut microbial ecology in favour of the dominance of beneficial bacteria. More interesting, in the current study, is the cost of the competitive exclusion solution which was not exceeded 1.5-2.0 % of commercial prebiotic or probiotic preparations.
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| Publication year |
2009
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| Pages |
1029-1044
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| City |
طابا
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| serial title |
5th International Poultry Conference
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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Broiler chickens.
Microbial flora.
Performance testing.
Probiotics.
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| Proposed Agrovoc |
prebiotic;growth performance;
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| Publication Type |
Conference/Workshop
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