China Animal Husbandry and Veterinary Medicine ›› 2019, Vol. 46 ›› Issue (11): 3208-3215.doi: 10.16431/j.cnki.1671-7236.2019.11.009

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Saccharomyces cerevisiae and Bacillus licheniformis on Rumen Fermentation in Sheep in vitro

ZHENG Weicai1, HAO Xiaoyan1, ZHANG Chunxiang1, XIANG Binwei2, ZHANG Wenjia2, WEN Haoyu3, ZHANG Jianxin1   

  1. 1. College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, China;
    2. Animal Husbandry Bureau of Youyu County, Youyu 037200, China;
    3. College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China
  • Received:2019-04-11 Online:2019-11-20 Published:2019-11-25

Abstract: The aim of this experiment was to study the effect of Saccharomyces cerevisiae and Bacillus licheniformis on rumen fermentation of sheep by in vitro culture method.Six fermentation substrates were prepared by adding 6×1011 CFU/kg Saccharomyces cerevisiae and 5 levels of Bacillus licheniformis (0 (C1 group)、1×1011(C2 group)、2×1011(C3 group)、3×1011(C4 group) and 4×1011 CFU/kg (C5 group))were added to the diet with a concentrate to forage ratios of 50:50,and the control group was set with no Saccharomyces cerevisiae and Bacillus licheniformis (C group).The gas production parameters,CH4 concentration,ruminal fermentation parameters and nutrient degradation rates were determined after fermented for 48 h.The result showed as follows:①The combined effects of Saccharomyces cerevisiae and Bacillus licheniformis had significant effects on the cumulative gas production at 24 and 48 h,the gas production of fast fermentation,the gas production of slow fermentation,the potential gas production and the gas production rate (P<0.05),and they reached the maximum at the addition of 2×1011CFU/kg Bacillus licheniformis.②The interaction of Saccharomyces cerevisiae and Bacillus licheniformis had no significant effect on pH value (P>0.05),but they could significantly affect ammoniacal nitrogen (NH3-N) and microbial proteins (MCP) yields (P<0.05).The concentration of NH3-N reached the minimum and MCP reached the maximum when the dosage of Bacillus licheniformis was 2×1011 CFU/kg.③The interaction effect of Saccharomyces cerevisiae and Bacillus lichenformis on the dry matter degradation rate (DMD),organic matter degradation rate (OMD) and metabolic energy (ME) were significant (P<0.05),but had no significant effects on neutral detergent fiber degradation rate (NDFD) and acid detergent fiber degradation rate (ADFD) (P>0.05).The DMD,OMD,NDFD and ME reached the maximum while ADFD reached the minimum at the addition of 2×1011CFU/kg Bacillus lichenformis.In conclusion,the Saccharomyces cerevisiae and Bacillus lichenformis supplement had significant interaction effects at 6×1011 and 2×1011 CFU/kg on rumen fermentation of sheep in vitro.

Key words: Saccharomyces cerevisiae; Bacillus lichenformis; sheep; in vitro fermentation

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