Effects of Candida utilis Treatment on the Nutrient Value of Rice Bran and the Effect of Candida utilis on the Degradation of Forages In vitro

  • Ando, Sada (Department of Livestock and Grassland Science, National Agricultural Research Center for Western Region) ;
  • Nishiguchi, Y. (Department of Livestock and Grassland Science, National Agricultural Research Center for Western Region) ;
  • Hayasaka, K. (Department of Livestock and Grassland Science, National Agricultural Research Center for Western Region) ;
  • Iefuji, H. (National Research Institute of Brewing) ;
  • Takahashi, J. (Department of Animal Science, Obihiro University of Agriculture and Veterinary Medicine)
  • Received : 2005.08.18
  • Accepted : 2006.02.16
  • Published : 2006.06.01


Candida utilis can assimilate fatty acids, so it was hypothesized that the treatment of rice by Candida utilis would improve feed quality by reducing fat content and adding the yeast function that would stimulate rumen microbes. In this study, the oil assimilation ability of Candida utilis IFO1086, 0988, 0626 and the effect of treatment of Candida utilis IFO1086, IFO0626 on the nutrient contents of rice bran were examined. The effect of Candida utilis addition on the in vitro degradability of forage was also investigated. It was found that the oil assimilating ability of IFO1086 and IFO0626 was significantly (p<0.01) higher than that of IFO0988. Candida utilis treatment reduced the EE content and increased the CP, ADF and NDF percentage. The absolute amount of ether extract was decreased by 35.9% in IFO1086 and IFO0626 treatment. The absolute amount of crude protein was not changed by yeast treatment. The ADF and NDF amounts were increased. The addition of Candida utilis increased in vitro forage degradability significantly (p<0.05). Based on these results it can be postulated that treatment of rice bran by Candida utilis may improve feed quality by reducing fat content, increasing the CP content and adding the function of yeast for stimulating rumen microbes.


Candida utilis;Rice Bran;Degradability;Forage


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