Abstract : Probiotics is a new type Ecologcs, that the livestock and poultry production performance could be improved when Reasonable application. Which Enhance the body's immune system, improve the quality of animal products and reduce environmental pollution, is a new type of green feed additives.now, the role of probiotics. mechanism and the use of Bacillus subtilis of liquid fermentation is discussed in This paper.Than the optimal conditions for fermentation of Bacillus subtilis was determined: 30°C is a fermentation temperature, 7.2 is the initial pH, 5% is the optimum inoculum, and the 35°C is the best drying temperature. And the fermentation of Bacillus subtilis bacterium is Prepared for a weaning of piglets’ soybean meal, which was to the Research of impact on production performance and stressed weaning reaction on weaned piglets.than the appropriate dosage of fermented soybean meal was determined. And its economic benefits was Assessmented, which is a useful references to a large-scale industrialization fermentation and the production of Bacillus subtilis probiotics.
Keywords : probiotics; Normal flora; Fermented soybean meal; Feed Additive