Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-28T20:16:52.611Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of sodium intake during two parities on Na status in Blackface sheep

Published online by Cambridge University Press:  09 March 2007

Isobel C. Vincent ,
A. R. Michell ,
H. Ll. Williams  and
R. Hill
Isobel C. Vincent
Affiliation:
Department of Animal Health and Production, The Royal Veterinary College, Boltons Park, Potters Bar, Herts. EN6 1NB
A. R. Michell
Affiliation:
Department of Animal Health and Production, The Royal Veterinary College, Boltons Park, Potters Bar, Herts. EN6 1NB
H. Ll. Williams
Affiliation:
Department of Animal Health and Production, The Royal Veterinary College, Boltons Park, Potters Bar, Herts. EN6 1NB
R. Hill
Affiliation:
Department of Animal Health and Production, The Royal Veterinary College, Boltons Park, Potters Bar, Herts. EN6 1NB
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

1. A low-sodium diet was given to Blackface ewes over two reproductive seasons. This diet provided a total of 3–7 mmol/d except during lactation when the intake was about 11 mmol/d. Control ewes were given the same diet supplemented with sodium chloride to provide recommended levels which were about tenfold that of the experimental diet.

2. The output of Na in urine and faeces from ewes given the low-Na diet was very low, about 3 mmol/d, from early in the experiment and continued at about this level throughout.

3. Lambs born to low-Na ewes and given a low-Na diet similar to that of their dams during lactation, grew, after weaning, more slowly than corresponding lambs from control ewes, but at 6 months of age when six from each group were killed, tissue Na contents were only slightly lower in experimental than control lambs.

4. Fluids and tissues obtained at the end of the second lactation from four ewes of each group that had suckled twin lambs, were analysed for Na and potassium. The Na concentration in saliva and rumen fluid of low-Na ewes was about half that of control ewes and there were corresponding increases in K: the differences were significant. Although Na concentrations for experimental ewes were generally lower than those for control ewes in the tissues analysed (liver, kidney, heart, brain and bone), the difference was significant only for the heart (P < 0.05). Haemoglobin and packed cell volume were significantly elevated in low-Na ewes (P < 0.01), indicating decreased body fluid volume. Enlargement of the adrenal glands in low-Na ewes (P < 0.01) and specifically in the zona glomerulosa (P < 0.001), showed the marked hormonal response to Na status of experimental ewes given a very-low-Na diet over two reproductive cycles.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 57 , Issue 3 , May 1987 , pp. 447 - 455
Copyright
Copyright © The Nutrition Society 1987

References

REFERENCES

Agricultural Research Council (1980). The Nutrient Requirements of Farm Livestock. Slough: Commonwealth Agricultural Bureaux.Google Scholar
Aitken, F. C. (1976). Sodium and Potassium in Nutrition of Mammals. Technical Communication no. 26. Slough: Commonwealth Bureau of Nutrition, Commonwealth Agricultural Bureaux.Google Scholar
Beal, A. M., Budtz-Olsen, O. E., Clark, R. C., Cross, R. B. & French, T. J. (1974). Quarterly Journal of Experimental Physiology 59, 141–151.CrossRefGoogle Scholar
Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J., Hill, R. & Walker, D. M. (1956). Journal of Agricultural Science, Cambridge 48, 175–186.CrossRefGoogle Scholar
Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J. & Hill, R. (1959). Journal of Agricultural Science, Cambridge 52, 1–12.CrossRefGoogle Scholar
Bergstrom, W. H. & Wallace, W. M. (1954). Journal of Clinical Investigation 33, 867–873.CrossRefGoogle Scholar
Blair-West, J. R., Coghlan, J. P., Denton, D. A., Nelson, J. F., Orchard, E., Scoggins, B. A., Wright, R. D., Myers, K. & Junqueira, C. L. (1968). Nature 217, 922–928.CrossRefGoogle Scholar
Blair-West, J. R., Coghlan, J. P., Denton, D. A.,& Wright, R. D. (1970). In Physiology of Digestion and Metabolism in the Ruminant, pp. 350–361. [Phillipson, A., editor]. Newcastle Upon Tyne: Oriel Press.Google Scholar
Bott, E., Denton, D. A., Goding, J. R. & Wright, R. D. (1964). Nature 202, 461–463.CrossRefGoogle Scholar
Denton, D. A. (1957). Quarterly Journal of Experimental Physiology 42, 72–95.CrossRefGoogle Scholar
Forbes, G. B. (1960). Journal of Paediatrics 56, 180–190.CrossRefGoogle Scholar
Ganguli, M. C., Smith, J. D. & Hanson, L. E. (1969). Journal of Nutrition 99, 395–400.CrossRefGoogle Scholar
Goodall, E. D. & Kay, R. N. B. (1965). Journal of Physiology 176, 12–23.CrossRefGoogle Scholar
Hagsten, I. & Perry, T. W. (1975). Journal of Animal Science 40, 1205–1210.CrossRefGoogle Scholar
Kay, R. N. B. (1960). Journal of Physiology 150, 515–537.CrossRefGoogle Scholar
McDougall, J. G., Coghlan, J. P., Scoggins, B. A. & Wright, R. D. (1974). American Journal of Veterinary Research 35, 923–929.Google Scholar
Ministry of Agriculture, Fisheries and Food (1976). Nutrient Allowances and Composition of Feedingstuffs for Ruminants, Booklet no. 2087. Pinner, Middlesex: Ministry of Agriculture, Fisheries and Food.Google Scholar
Morris, J. G. & Gartner, R. J. W. (1971). British Journal of Nutrition 25, 191–205.CrossRefGoogle Scholar
Nichols, G. Jr & Nichols, N. (1956). American Journal of Physiology 186, 383–392.CrossRefGoogle Scholar
Scott, D. & Dobson, A. (1965). Quarterly Journal of Experimental Physiology 50, 42–56.CrossRefGoogle Scholar
Vincent, I. C., Williams, H. LI. & Hill, R. (1986 a). British Journal of Nutrition 56, 193–198.CrossRefGoogle Scholar
Vincent, I. C., Williams, H. LI., Michell, A. R. & Hill, R. (1986 b). Journal of Agricultural Science, Cambridge 106, 383–387.CrossRefGoogle Scholar
Warner, A. C. I. & Stacy, B. D. (1972). Quarterly Journal of Experimental Physiology 57, 103–119.CrossRefGoogle Scholar
Winters, R. W., Whitelock, R. T., De Walt, J. L. & Welt, L. G. (1958). American Journal of Physiology 195, 697–701.CrossRefGoogle Scholar