Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-25T07:39:04.326Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of potassium on the sodium requirements of growing steers with and without α-tocopherol supplementation

Published online by Cambridge University Press:  09 March 2007

J. G. Morris  and
R. J. W. Gartner
J. G. Morris
Affiliation:
Animal Research Institute, Yeerongpilly, Brisbane, Australia
R. J. W. Gartner
Affiliation:
Animal Research Institute, Yeerongpilly, Brisbane, Australia
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. Hereford steers, housed in concreted yards and given demineralized water, were offered ad lib. a low-sodium (0.07 g Na and 4.5 g potassium/kg) basal diet of sorghum grain, urea and minerals, to which 0, 15 or 30 g K as KHCO3/kg diet had been added. Mean daily intakes of K were 26, 107 and 168 g/steer respectively.

2. The steers were given daily supplements of 0, 3.25 or 6.50 g Na as NaHCO3/steer, added to the food; mean daily intakes of Na (food plus supplemental NaHCO3 minus residues) were 0.41, 3.06 and 6.26 g/steer respectively.

3. Rate of gain of body-weight was positively related to the rate of Na supplementation and negatively related to the K content of the diet, but there was no interaction between Na and K contents of the diet.

4. The Na: K ratios for the parotid saliva from steers not given Na supplements was 0.3, whereas steers ingesting either 3.1 or 6.3 g Na/d had Na: K ratios of about 12. Increasing the amount of K in the diet had no consistent effect on the saliva Na: K ratio. The Na: K ratios for rumen fluid reflected changes in the saliva Na: K ratio in response to Na supplements and were inversely related to the amount of K in the diet.

5. The width of the adrenal zona glomerulosa from steers receiving the basal diet, without Na supplements, was significantly greater than that from steers given the Na supplements, but it was not affected by the amount of K in the diet.

6. Both Na supplements and the diet containing 30 g added K/kg significantly increased the Na: K ratio of the plasma.

7. The addition of 200 mg DL-α-tocopheryl acetate/steer per d to the diet had no significant effects on the growth rate of the steers.

8. It was concluded that the Na requirement of steers for growth was not significantly affected by the amount of K in the diet up to 168 g/d.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 34 , Issue 1 , July 1975 , pp. 1 - 14
Copyright
Copyright © The Nutrition Society 1975

References

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock No. 2, Ruminants. London: Agricultural Research Council.Google Scholar
Anderson, R. S. & Pickering, E. C. (1962). J. Physiol., Lond. 164, 180.CrossRefGoogle Scholar
Dewhurst, J. K., Harrison, F. A. & Keynes, R. D. (1968). J. Physiol., Lond. 195, 609.CrossRefGoogle Scholar
Emery, R. S. & Brown, L. D. (1961). J. Dairy Sci. 44, 1899.CrossRefGoogle Scholar
Kemp, A. (1964). Neth.J. agric. Sci. 12, 263.Google Scholar
Matrone, G., Ramsey, H. A. & Wise, G. H. (1959). Proc. Soc. exp. Biol. Med. 100, 8.CrossRefGoogle Scholar
Morris, J. G. & Gartner, R. J. W. (1971). Br. J. Nutr. 25, 191.CrossRefGoogle Scholar
Morris, J. G. & Murphy, G. W. (1972). J. agric. Sci., Camb. 78, 105.CrossRefGoogle Scholar
Morris, J. G. & Pepper, P. M. (1969). J. agric. Sci., Camb. 73, 41.CrossRefGoogle Scholar
National Research Council (1970). Publs natn. Res. Coun., Wash. no. 1754.Google Scholar
Nicholson, J. W. G. & Cunningham, H. M. (1961). Can. J. Anim. Sci. 41, 134.CrossRefGoogle Scholar
Nicholson, J. W. G., Cunningham, H. M. & Friend, D. W. (1962). Can. J. Anim. Sci. 42, 75.CrossRefGoogle Scholar
Nicholson, J. W. G., Cunningham, H. M. & Friend, D. W. (1963). J. Anim. Sci. 22, 368.CrossRefGoogle Scholar
Nobile, S. R. V. (1963). Australas. J. Pharm. 44, 26.Google Scholar
Packett, L. V. & Butcher, G. A. (1963). J. Anim. Sci. 22, 1100.CrossRefGoogle Scholar
Scott, D. (1967). Q. Jl exp. Physiol. 52, 382.CrossRefGoogle Scholar
Scott, D. (1969). Q. J1 exp. Physiol. 54, 25.CrossRefGoogle Scholar
StOmer, V. V. E. & Roberts, W. K. (1967). Can. J. Anim. Sci. 47, 39.CrossRefGoogle Scholar
Von Bunge, G. (1873). Z. Biol. 9, 104.Google Scholar
Wise, M. B., Blumer, T. N., Matrone, G. & Barrick, E. R. (1961). J. Anim. Sci. 20, 561.CrossRefGoogle Scholar
Woolfitt, W. C., Howell, W. D. & Bell, J. M. (1964). Can.J. Anim. Sci. 44, 179.CrossRefGoogle Scholar