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Combined effects of aspergillus oryzae fermentation extract (amaferm; ao) and monensin on fermentation in the rumen simulation technique (rusitec)

  • N. McKain (a1), C.J. Newbold (a1) and R.J. Wallace (a1)

Extract

Monensin, an ionophore, and AO, a fungal feed additive, are growth promoters which modify rumen fermentation. Previous studies have shown that monensin increased propionate, the efficiency of bacterial growth and the flow of protein from the rumen and decreased methane production and fibre digestion (Schelling, 1984), whereas AO increased bacterial numbers and fibre digestion and lowered methane production (Frumholtz et al., 1989; Fondevila et al., 1990). The aim of the present study was to determine, using Rusitec, the effects on rumen fermentation of combining these additives.

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Fondevila, M., Newbold, C. J., Hotten, P. M. & Orskov, E. R. (1990). A note on the effect of Aspergillus oryzae fermentation extract on the rumen fermentation of sheep given straw. Anim. Prod. 51, 422425.
Frumholtz, P. P., Newbold, C. J. & Wallace, R. J. (1989). Influence of Aspergillus oryzae fermentation extract on the fermentation of a basal ration in the rumen simulation technique (Rusitec). J. Agric. Sci., Camb. 113, 169172.
Schelling, G. T. (1984). J. Anim. Sci. 58, 15181527.
Wallace, R. J. (1983). Hydrolysis of 14C-labelled proteins by rumen microorganisms and by proteolytic enzymes prepared from rumen bacteria. Br. J. Nutr. 50, 345355
Wallace, R. J., Broderick, G. A. & Brammall, M. L. (1987). Microbial protein and peptide metabolism in rumen fluid from faunated and ciliate- free sheep. Br. J. Nutr. 58, 8793
Wallace, R. J. & McKain, N. (1989). Analysis of peptide metabolism by rurninal microorganisms. App. Environ. Microbiol. 55, 23722376.

Combined effects of aspergillus oryzae fermentation extract (amaferm; ao) and monensin on fermentation in the rumen simulation technique (rusitec)

  • N. McKain (a1), C.J. Newbold (a1) and R.J. Wallace (a1)

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