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In vitro microbial growth as affected by the type of carbohydrate and the source of nitrogen

Published online by Cambridge University Press:  20 November 2017

M.L. Tejido ,
M.D. Carro ,
M. J. Ranilla  and
S. López
M.L. Tejido
Affiliation:
Dept. Producción Animal I, Universidad de León, 24071 León, Spain
M.D. Carro
Affiliation:
Dept. Producción Animal I, Universidad de León, 24071 León, Spain
M. J. Ranilla
Affiliation:
Dept. Producción Animal I, Universidad de León, 24071 León, Spain
S. López
Affiliation:
Dept. Producción Animal I, Universidad de León, 24071 León, Spain
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Extract

The nitrogen (N) requirements for optimum growth of ruminal micro-organisms are still a matter of controversy. Whereas the results of some experiments indicate that peptides and amino acids stimulate the growth of mixed rumen bacteria in comparison to ammonia, no effect due to the N form has been found in other studies. Therefore, it has been suggested that growth of rumen micro-organisms would be stimulated only when the rate of provision of energy permitted (Cruz Soto et al., 1994). The aim of this study was to investigate the effect of two N sources (ammonia and isolated soyabean protein) on the in vitro fermentation of two substrates (starch and cellulose) differing in their rate of fermentation.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2001 , 2001 , pp. 152
Copyright
Copyright © The British Society of Animal Science 2001

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References

Cruz Soto, R., Muhammed Samirah, A., Newbold, C.J., Stewart, C.S. and Wallace, J. 1994. Influence of peptides, amino acids and urea on microbial activity in the rumen of sheep receiving grass hay and on the growth of rumen bacteria in vitro. Animal Feed Science and Technology 49, 151–161.Google Scholar