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Ruminal flow rate of soya-bean meal, rapeseed meal and cottonseed meal in cows fed at maintenance and at three times maintenance

Published online by Cambridge University Press:  27 March 2009

J. E. Lindberg
J. E. Lindberg
Affiliation:
Department of Animal Nutrition, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
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Extract

The introduction of new protein evaluation systems for ruminants presupposes means to measure the ruminal protein degradability of feeds (Burroughs, Nelson & Mertens, 1975; Roy et al. 1977; Vérité, Journet & Jarrige, 1979). One potentially useful method to get such estimates is the nylon bag technique (Mehrez & Ørskov, 1977). This method, however, does not take into account the flow of feed particles from the rumen. By adjusting rumen degradation results obtained in sacco with the outflow of the feed from the rumen more accurate estimates of the actual degradability is possible (0ørskov & McDonald, 1979).

Type
Short Note
Information
The Journal of Agricultural Science , Volume 98 , Issue 3 , June 1982 , pp. 689 - 691
Copyright
Copyright © Cambridge University Press 1982

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References

REFERENCES

Burroughs, W., Nelson, D. K. & Mertens, D. R. (1975). Protein physiology and its application in the lactating cow: the metabolizable protein feeding standard. Journal of Animal Science 41, 933–944.Google Scholar
Eliman, M. E. & Oørskov, E. R. (1981). Determination of rate of outflow of protein supplements from the rumen by measuring the rate of excretion of chromiumtreated protein supplements and polyethylene glycol in the faeces. Animal Production 32, 386.Google Scholar
Ganev, G., Oørskov, E. R. & Smart, R. (1979). The effect of roughage or concentrate feeding and rumen retention time on total degradation of protein in the rumen. Journal of Agricultural Science, Cambridge 93, 651–656.Google Scholar
Ghovum, W. L. & Williams, V. J. (1973). Rate of passage of digesta in sheep. 4. Passage of marker through the alimentary tract and the biological relevance of rate-constants derived from the changes in concentration of marker in faeces. British Journal of Nutrition 30, 313–329.Google Scholar
Hydén, S. (1956). A turbidimetric method for the determination of higher polyethylene glycols in biological materials. Annales of the Royal Agricultural College Sweden 22, 139–145.Google Scholar
Hydén, S. (1961). Determination of the amount of fluid in the reticulo-mmen of the sheep and its rate of passage to the omasum. Annales of the Royal Agricultural College Sweden 27, 51–79.Google Scholar
Lindbero, J. E. (1981). The effect of basal diet on the ruminal degradation of dry matter, nitrogenous compounds and cell walls in nylon bags. Swedish Journal of Agricultural Research 11, 159–169.Google Scholar
Mansbridge, R. J. & Oørskov, E. R. (1980). Measurement of and factors affecting outflow rates of protein supplements in sheep and cattle. Animal Production 30, 486–487.Google Scholar
Mathieson, J. (1970). The automated estimation of chromic oxide. Proceedings of the Nutrition Society 9, 30 A.Google Scholar
Mehrez, A. Z. & Oørskov, E. R. (1977). A study of the artificial fibre bag technique for determining the digestibility of feed in the rumen. Journal of Agricultural Science, Cambridge 88, 645–650.CrossRefGoogle Scholar
Oørskov, E. R. & Mcdonald, I. (1979). The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agricultural Science, Cambridge 92, 499–503.CrossRefGoogle Scholar
Roy, J. H., Balch, C. C, Miller, E. L., Oørskov, E. R. & Smith, R. H. (1977). Calculation of the N-requirement for ruminants from nitrogen metabolism studies. In Protein Metabolism and Nutrition. EAAP, publication 22, Wageningen, pp. 126–129.Google Scholar
Sriskandarajah, N., Kellaway, R. C. & Leibholz, J. (1981). Retention times in the rumen of roughages and a protein supplement. Journal of Agricultural Science, Cambridge 97, 231–232.Google Scholar
Stevenson, A. E. & Clare, N. T. (1963). Measurement of feed intake by grazing cattle and sheep. IX. Determination of chromic oxide in faeces using an Auto Analyzer. New Zealand Journal of Agricultural Research 6, 121–126.CrossRefGoogle Scholar
Udén, P., Colucci, P. E. & Van Soest, P. J. (1980). Investigation of chromium, cerium and cobalt as markers in digesta. Rate of passage studies. Journal of the Science of Food and Agriculture 31, 625–632.CrossRefGoogle ScholarPubMed
Vérité, R., Journet, M. & Jarrige, R. (1979). A new system for the protein feeding of ruminants: the PDI-system. Livestock Production Science 6, 349–367.CrossRefGoogle Scholar