Optimization on Production Key Factors of Microbial Fermented Feed and Analysis on Composition Variation During Fermentation

[ Objective] In order to study the production key factors of microbial fermented feed and the composition variation during fermentation. [ Methods ] Water, temperature, energy and protein were selected to study the effects on microbial fermented feed. And the fermentation conditions were optimized. Changes on nutrient composition during fermentation were determined and analyzed. [ Result ] Test results showed that feed formula with high sugar content, low protein, 34% - 36% water content, high fermentation temperature was more conducive to the production and actual production needs of fermentation strains. During the fermentation, strains showed interactions, test tended to be completed at the 144^th h after the fermentation, and number of lactic acid bacteria reached the peak of 1.86×10^9 strain/g, contents of lactic acid could even reach 0.89%. As time prolonged, contents of total energy, fiber and isothiocyanate gradually reduced, while contents of water and protein increased slightly. Contents of vitamin were stable, which in an order of VB〉 VE 〉 Vx 〉 VA 〉 VD. Composition of amino acids showed an better change, contents of glutamic acid and proline decreased slowly, while contents of glycine and phenylalanine increased slowly. [ Conclusion] High quality microbial fermentation feed could improve the palatability and safety of feed and keep the intestinal balance of livestock and poultry, which had broad application prospect.

Effects of Microbial Fermentation Feeds on Growth Performance of Weaned Piglets

[ Objective] TO study the effects of microbial fermentation feeds on growth performance of piglets, and provide the basis for their promotion and application, [ Method ] All of 60 Duroc x Landrace x Yorkshire crossbred weaned piglets, weighing 8-10 kg, were randomly housed in six groups, 10 piglets in each group. The piglets in control groups were fed with traditional daily food which contained aureomycin at 70 mg/kg . BW and concentrate feeds without antibiotics. While the piglets in experimental groups were fed with concentrate feeds without antibiotics and microbial fermentation feeds. [ Result] The results indicated that the average daily gain of experimental groups raised by 5.56%, and the feed conversion ratio reduced by 3.53% compared to control group. Moreover, the number of probiotics in the feces of experimental groups increased and pH value decreased significantly compared with the control groups （P 〈 0.05）. [ Conclusion] Microbial fermentation feeds can be used to replace antibiotics feeds, and promote healthy growth of the piglets.