Influences of Surfactant Tween 80 on the Gas Production, Cellulose Digestion and Enzyme Activities by Mixed Rumen Microorganisms

  • Lee, Sung S. (Division of Animal Science and Technology, Gyeongsang National University) ;
  • Ha, Jong K. (Division of Animal Science and Technology, Gyeongsang National University)
  • Received : 2003.01.17
  • Accepted : 2003.04.17
  • Published : 2003.08.01


The surfactant Tween 80 was evaluated for its ability to influence cumulative gas production, cellulose digestion, and enzyme activities by mixed ruminal microorganisms grown on barley grain or Orchardgrass hay. The addition of Tween 80 at a level of 0.10% significantly (p<0.05) decreased the cumulative gas production rate from both barley grain or Orchardgrass hay substrates. However, 0.05% Tween 80 did not affect gas production rates compared to the control treatment. The addition of 0.05% Tween 80 to cultures growing on barley grain resulted in a significant increase in cellulase (90.01%), xylanase (90.73%) and amylase (487.25%) activities after 30 h incubation. Cultures utilizing Orchardgrass hay had a significant increase in cellulase (124.43%), xylanase (108.86%) and amylase (271.22%) activities after 72 h incubation. These increases in activities were also observed with cultures supplemented with 0.10% Tween 80 throughout all the incubation times tested. These results indicated that the addition of 0.05% Tween 80 could greatly stimulate the release of some of key enzymes without decreasing cell growth rate in contrast to trends reported with aerobic microorganism. Our data indicates potential uses of the surfactant Tween 80 as a feed additive for ruminant animals.


Tween 80, Rumen Microorganisms;Gas Production;Enzyme Activity;Cellulose Digestion;Feed Additives


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