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The development and function of the rumen in milk-fed calves

Published online by Cambridge University Press:  27 March 2009

R. H. Smith
R. H. Smith
Affiliation:
National Institute for Research in Dairying, University of Reading
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Extract

1. The volume of rumen liquor in milk-fed calves at different ages up to 32 weeks was estimated by injecting polyethylene glycol into the rumen and subsequently determining its concentration in the rumen liquor. This volume increased progressively with age in relation to unit body weight. The increase xswas approximately fourfold between 4–8 weeks on the one hand and 28–32 weeks on the other.

2. The amount of milk entering the rumen during a feed was estimated at different ages up to 32 weeks by the subsequent determination of the volume and fat content of the rumen liquor. In the majority of cases less than 5% of the milk fed entered the rumen. There did not appear to be any increase in the quantities of milk entering the rumen as the calves got older.

3. An estimate of the rate of flow of fluid into and out of the rumen (other than milk at feeding) was made by measuring the rate of disappearance of polyethylene glycol from the rumen. A mean figure of 255 ml./hr./100 kg. body weight s.d. ± 50 was obtained in this way. It is suggested that this value probably represents the rate of flow of saliva.

4. Magnesium, in a concentration up to about 8 mg./100 ml. in the rumen liquor, did not appear to be absorbed to more than a small extent through the rumen wall.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 52 , Issue 1 , February 1959 , pp. 72 - 78
Copyright
Copyright © Cambridge University Press 1959

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References

REFERENCES

Bailey, C. B. (1957). Ann. Rep. National Institute for Research in Dairying, p. 45.Google Scholar
Benzie, D. & Phillipson, A. T. (1957). The Alimentary Tract of the Ruminant, plate 29. Edinburgh: Oliver and Boyd.Google Scholar
British Standards Institution (1955). British Standard, no. 696.Google Scholar
Colin, G. C. (1886). Treatise on the Comparative Physiology of Domestic Animals, 1, 3rd ed.Paris: J. B. Ballière and Sons.Google Scholar
Comline, R. S. & Titchen, D. A. (1951). J. Physiol. 115, 210.CrossRefGoogle Scholar
Godden, W. (1937). Tech. Commun. Bur. Anim. Nutr., Aberd., no. 9, 39.Google Scholar
Herman, H. A. (1936). Res. Bull. Mo. Agric. Exp. Sta. no. 245.Google Scholar
Hydén, S. (1956 a). K. LantbrHögsk. Ann. 22, 139.Google Scholar
Hydén, S. (1956 b). K. LantbrHögsk. Ann. 22, 411.Google Scholar
McDougall, E. I. (1948). Biochem. J. 43, 99.CrossRefGoogle Scholar
Markoff, J. (1913). Biochem. Z. 57, 1.Google Scholar
Marshall, F. H. A. & Halnan, E. T. (1946). Physiology of Farm Animals, 4th ed. p. 65. Cambridge University Press.Google Scholar
Sisson, S. & Grossman, J. D. (1953). The Anatomy of the Domestic Animals, 4th ed. p. 456. Philadelphia: W. B. Saunders.Google Scholar
Somogyi, M. (1945). J. Biol. Chem. 160, 69.CrossRefGoogle Scholar
Sperber, I., Hydén, S. & Ekman, J. (1953). K. LantbrHögsk. Ann. 20, 337.Google Scholar
Smith, R. H. (1957). Biochem. J. 67, 472.CrossRefGoogle Scholar
Smith, R. H. (1958). Biochem. J. 70, 201.CrossRefGoogle Scholar
Stewart, J. & Moodie, E. W. (1956). J. Comp. Path. 66, 10.CrossRefGoogle Scholar
Warner, R. G., Bernholdt, H. F., Grippin, C. H. & Loosli, J. K. (1953). J. Dairy Sci. 36, 599.Google Scholar
Warner, R. G., Flatt, W. P. & Loosli, J. K. (1956). J. Agric. Food. Chem. 4, 788.CrossRefGoogle Scholar
Wise, G. H., Andekson, G. W. & Miller, P. G. (1942). J. Dairy Sci. 25, 529.CrossRefGoogle Scholar