The Effect Of Bacillus On Microflora Of Sows And Piglets And Optimization Of Its Growth Condition

Probiotics, as a new feed additive, possess the trend of alternative antibiotics, which can regulate the micro-ecological balance, and enhance immune defense function of animals, promote animals'health growth, and many other effects and benefits. This topic through feeding trials, microbial testing, a variety of physiological and biochemical tests, focus on the probiotics maternal microflora by feeding of pregnant sows on the primary source of small pigs and the growth performance of microbial influence on the newborn piglet, detect the intestinal flora of pregnant sows and their newborn piglets with microscopic examination, detect short-chain fatty acids of the different stages of gestation sows and newborn piglets by gas equipment and its method, and explore the effect on the growth performance and health status of newborn piglets, and finally test on the optimization of Bacillus growth and obtain an adaptation culture conditions for the growth of Bacillus. The results are as follows:1. During prenatal ten days of pregnant sows and weaning period, adding Bacillus to pregnant sows dietary has a beneficial effect on changing intestinal micro-ecosystem of pregnant sows and helping establish gut microflora system of piglets. It has an significantly improvement on the growth performance of piglets (P<0.05).2. During prenatal ten days of pregnant sows and weaning period, adding Bacillus to pregnant sows dietary can increase the production of short chain fatty acids in pregnant sow(SCFA) (P<0.05), and can increase the production of short-chain fatty acids in newborn piglets (SCFA) (P<0.01), and the younger the pigs, the more obvious the effect.3.Optimal culture conditions of Bacillus:medium 0.5% NaCl, 0.2%MgSO4+0.2%KH2PO4,2% soybean meal,2% starch,3% glucose,1% corn steep liquor, temperature 35℃, inoculums 2%, pH 7.3.