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Feeding frequency for lactating cows: effects on rumen fermentation and blood metabolites and hormones

Published online by Cambridge University Press:  09 March 2007

J. D. Sutton ,
I. C. Hart ,
W. H. Brosters ,
Rosemary J. Elliott  and
E. Schuller
J. D. Sutton
Affiliation:
National Institute for Research in Dairying§, Shinfield, Reading RG2 9AT
I. C. Hart
Affiliation:
National Institute for Research in Dairying§, Shinfield, Reading RG2 9AT
W. H. Brosters
Affiliation:
National Institute for Research in Dairying§, Shinfield, Reading RG2 9AT
Rosemary J. Elliott
Affiliation:
National Institute for Research in Dairying§, Shinfield, Reading RG2 9AT
E. Schuller
Affiliation:
National Institute for Research in Dairying§, Shinfield, Reading RG2 9AT
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Abstract

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1. The present paper reports the effects on rumen fermentation and plasma metabolites and hormones of giving fixed rations of hay and high-cereal concentrates at different meal frequencies to lactating cows. In Expt 1 the total ration was given in two and twenty-four meals daily and in Expts 2–4 the concentrates were given in two and five or six meals and the hay in two meals daily. The diets contained 600–920 g concentrates/kg.

2. In Expt I, minimum rumen pH was higher but mean pH was lower when cows were given their ration in twenty-four meals/d rather than two meals/d.

3. In all the experiments, the effects of increased meal frequency on the molar proportions of rumen volatile fatty acids (VFA) were small and not significant, although there was a general tendency for the proportion of acetic acid to increase and that of propionic acid to fall. Increasing the proportion of concentrates in the diet reduced the proportion of acetic acid and increased the proportions of propionic and n-valeric acids.

4. In Expt 3, more frequent feeding was found to reduce the concentration of non-esterified fatty acids in the blood, but changes in other metabolites were small and not significant. Increasing the proportion of concentrates in the diet reduced the concentrations of acetic acid and 3-hydroxybutyric acid and increased the concentrations of propionic acid and glucose.

5. The mean daily concentration of insulin in the blood was reduced by more frequent feeding of the higher-concentrate diet but not of the lower-concentrate diet. The concentration of glucagon also tended to fall with more frequent feeding. Increasing the proportion of concentrates in the diet increased the concentration of insulin.

6. More frequent feeding reduced the depression in milk-fat concentration caused by feeding the low-roughage diets. About three-quarters of the variation in milk-fat concentration could be related to changes in rumen VFA proportions, but the relations for the two meal frequencies had different intercepts although similar curves. The results suggest that milk-fat depression on low-roughage diets with twice-daily feeding was due to a change in rumen VFA proportions accompanied by elevated plasma insulin concentrations. The improvement in milk-fat concentration due to more frequent feeding could be explained partly by the small change in rumen VFA proportions and partly by a reduction in mean plasma insulin concentrations, but these mechanisms did not fully account for the milk-fat responses observed.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 56 , Issue 1 , July 1986 , pp. 181 - 192
Copyright
Copyright © The Nutrition Society 1986

References

REFERENCES

Alford, F. P., Bloom, S. R. & Nabarro, D. N. (1977). Diabetologia 13, 1–6.CrossRefGoogle Scholar
Ambo, K., Takahashi, H. & Tsuda, T. (1973). Tohuku Journal of Agricultural Research 24, 54–62.Google Scholar
Bath, I. H. & Rook, J. A. F. (1963). Journal of Agricultural Science, Cambridge 61, 341–348.CrossRefGoogle Scholar
Bines, J.A. & Hart, I. C. (1984). Canadian Journal of Animal Science 64 Suppl., 304–305.CrossRefGoogle Scholar
Brockman, R. P. (1978). Canadian Veterinary Journal 19, 55–62.Google Scholar
de Jong, A. (1982). Journal of Endocrinology 92, 357–370.CrossRefGoogle Scholar
Evans, E., Buchanan-Smith, J. G. & MacLeod, G. K. (1975). Journal of Animal Science 41, 1474–1479.CrossRefGoogle Scholar
Hart, I. C. (1983). Proceedings of the Nutrition Society 42, 181–194.CrossRefGoogle Scholar
Hart, I. C., Bines, J. A., Morant, S. V. & Ridley, J. L. (1978). Journal of Endocrinology 77, 333–345.CrossRefGoogle Scholar
Jensen, K. & Wolstrup, J. (1977). Acta Veterinaria Scandinavica 18, 108–121.CrossRefGoogle Scholar
Jorgensen, N. A., Schultz, L. H. & Barr, G. R. (1965). Journal of Dairy Science 48, 1031–1039.CrossRefGoogle Scholar
Kaufmann, W. & Hagemeister, H. (1973). Übersicht der Tierernährung 1, 193–221.Google Scholar
Kaufmann, W., Rohr, K., Daenicke, R. & Hagemeister, H. (1975). Sonderheft der Berichte über Landwirtschaft 191, 269–295.Google Scholar
Knox, K. L. & Ward, G. M. (1961). Journal of Dairy Science 44, 1550–1553.CrossRefGoogle Scholar
McClymont, G. L. & Vallance, S. (1962). Proceedings of the Nutrition Society 21, xli.Google Scholar
Ostazewski, P. & Barej, W. (1979). Annales de Recherches Vétérinaires 10, 385–387.Google Scholar
Sutton, J. D. (1976). In Principles of cattle production, pp. 121–143 [Swan, H. and Broster, W. H., editors]. London: Butterworths.Google Scholar
Sutton, J. D. (1985). Journal of Dairy Science 68, 3376–3393.CrossRefGoogle Scholar
Sutton, J. D., Broster, W. H., Napper, D. J. & Siviter, J. W. (1985). British Journal of Nutrition 53, 117–130.CrossRefGoogle Scholar
Sutton, J. D. & Johnson, V. W. (1969). Journal of Agricultural Science, Cambridge 73, 459–468.CrossRefGoogle Scholar
Walker, C. K. & Elliot, J. M. (1973). Journal of Dairy Science 56, 375–377.CrossRefGoogle Scholar