Bacillus subtilis s train specificity affects performance improvement in broilers
| Autor: | Preben Nielsen, P.-A. Geraert, Karoline Sidelmann Brinch, Lamya Rhayat, Adam Nelson, Vincent Jacquier, Estelle Devillard |
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| Rok vydání: | 2017 |
| Předmět: |
Male
0301 basic medicine Litter (animal) Clostridium perfringens Bacillus subtilis Feed conversion ratio law.invention Random Allocation 03 medical and health sciences Probiotic law Animals Food science Meal biology Strain (chemistry) Probiotics 0402 animal and dairy science Broiler 04 agricultural and veterinary sciences General Medicine biology.organism_classification Animal Feed 040201 dairy & animal science Diet 030104 developmental biology Animal Nutritional Physiological Phenomena Animal Science and Zoology Phytase Chickens |
| Zdroj: | Poultry Science. 96:2274-2280 |
| ISSN: | 0032-5791 |
| DOI: | 10.3382/ps/pex018 |
| Popis: | The study reports the effects on broiler performance of a newly isolated Bacillus subtilis strain, which is phylogenetically not closely related to already well-described strains of B. subtilis. In the first experiment, birds were reared in battery cages and exposed to C. perfringens. An increase in growth performance was observed with the strain when compared to the challenged animals. Three additional growth trials were conducted to 35 d of age, in different rearing conditions (genetic breeds, corn-soybean meal-based diet with or without animal proteins, in presence or absence of phytase, on fresh or used litter) to investigate the efficacy and the specificity of this new B. subtilis strain on the improvement of BWG and FCR of broilers in comparison with a B. subtilis-based DFM already used in the field. Whatever the rearing conditions tested, the new B. subtilis strain led to an average 3.2% improvement in feed conversion ratio or bodyweight. Comparatively, the commercial Bacillus strain significantly improved broiler performance in only one trial out of 3 with an average improvement reaching 2%. All these results indicate that this new B. subtilis strain consistently improves broiler performances. |
| Databáze: | OpenAIRE |
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