Adisseo France SAS, Center of Expertise in Research and Nutrition, 6 Route Noire, Malicorne, 03600, FR.
Novozymes A/S, Krogshøjvej 36, Bagsvaerd, 2880, DK.
Poult Sci. 2017 Jul 1;96(7):2274-2280. doi: 10.3382/ps/pex018.
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.
该研究报告了一种新分离的枯草芽孢杆菌菌株对肉鸡性能的影响，该菌株在系统发育上与已描述的枯草芽孢杆菌菌株没有密切关系。在第一个实验中，鸟类在笼中饲养并暴露于产气荚膜梭菌。与受到挑战的动物相比，该菌株的生长性能有所提高。另外进行了 3 个生长试验，直至 35 日龄，在不同的饲养条件下（遗传品种、含有或不含有动物蛋白的玉米-豆粕基础日粮、存在或不存在植酸酶、新鲜或使用过的垫料），以研究这种新的枯草芽孢杆菌菌株在改善肉鸡平均日增重和饲料转化率方面的功效和特异性，与已在现场使用的基于枯草芽孢杆菌的 DFMs 进行比较。无论测试何种饲养条件，新的枯草芽孢杆菌菌株平均使饲料转化率或体重提高了 3.2%。相比之下，商业枯草芽孢杆菌菌株仅在 3 次试验中的 1 次中显著提高了肉鸡的性能，平均提高了 2%。所有这些结果表明，这种新的枯草芽孢杆菌菌株始终能提高肉鸡的性能。
