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The relationship between the serum magnesium concentration of grazing ewes and their dry matter intake and milk yield

Published online by Cambridge University Press:  27 March 2009

J. L. L'Estrange ,
J. B. Owen  and
D. Wilman
J. L. L'Estrange
Affiliation:
School of Agriculture, University of Cambridge
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Extract

1. A group of six lactating ewes, rotationally grazed a low-nitrogen treated plot (40 lb nitrogen applied in early March) and a similar group a highnitrogen treated plot (1001b nitrogen applied in early March and 60 lb at monthly intervals thereafter, all as Nitro-chalk) from mid-April to early July, and the concentrations of serum magnesium and calcium along with food intake and milk yields of the ewes were studied.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 68 , Issue 2 , April 1967 , pp. 165 - 171
Copyright
Copyright © Cambridge University Press 1967

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References

REFERENCES

Czabnocki, J., Sibbald, I. R. & Evans, E. V. (1961). The determination of chromic oxide in samples of feed and excreta by acid digestion and spectrophotometry. Can. J. Anim. Sci. 41, 167–79.CrossRefGoogle Scholar
Griffiths, T. W. (1959). Studies on the magnesium status of grassland herbage and its possible significance in animal health. A comparison of various forms of magnesium applied as a fertiliser dressing. J. Br. Grassld Soc. 14, 199–205.CrossRefGoogle Scholar
Hemingway, R. G., Ritchie, N. S., Brown, N. A. & Peart, J. N. (1965). Effects of grazing management on plasma calcium and magnesium concentrations of ewes in early lactation. J. agric. Sci., Camb. 64, 109–13.CrossRefGoogle Scholar
Hemingway, R. G. & Ritchie, N. S. (1963). Hypomagnesaemia in sheep. Some inconsistencies. J. Sci. Fd Agric. 14, 162–71.CrossRefGoogle Scholar
L'Estrange, J. L. & Axford, R. F. E. (1964 a). A study of serum mineral changes in lactating Welsh mountain ewes under different grazing conditions with special reference to hypomagnesaemia. J. agric. Sci., Camb. 62, 341–51.CrossRefGoogle Scholar
L'Estrange, J. L. & Axford, R. F. E. (1964 b). A study of magnesium and calcium metabolism in lactating ewes fed a semi-purified diet low in magnesium. J. agric. Sci., Camb. 62, 353–68.CrossRefGoogle Scholar
Owen, J. B. & Ingleton, J. W. (1963). A study of food intake and production in grazing ewes. I. The measurement of food intake. J. agric. Sci., Camb. 61, 267–74.CrossRefGoogle Scholar
Owen, J. B. & Sinclair, K. B. (1961). The development of hypomagnesaemia in lactating ewes. Vet. Rec. 73, 1423–24.Google Scholar
Ritchie, N. S. & Hemingway, R. G. (1963). Effects of conventional daily magnesium supplementation, breed of ewe and continued potassium fertiliser on plasma magnesium and calcium levels of ewes. J. agric. Sci., Comb. 61, 411–15.CrossRefGoogle Scholar
Ross, D. B. (1960). Some observations on the effects of changes in environmental conditions and diet in ewes. Vet. Rec. 72, 364–6.Google Scholar
Stillings, B. R., Bratzler, J. W., Marriott, L. F. & Miller, R. C. (1964). Utilisation of magnesium and other minerals by ruminants consuming low and high nitrogen-containing forages and vitamin D. J. Anim. Sci. 23, 1148–54.CrossRefGoogle Scholar
Todd, J. R. (1959). The determination of calcium and magnesium in blood serum by direct titration. Br. vet. J. 115, 86–9.CrossRefGoogle Scholar
Todd, J. R. (1961). Magnesium in forage plants I. Magnesium content of different species and strains as affected by season and soil treatment. J. agric. Sci., Camb. 56, 411–15.CrossRefGoogle Scholar
Wilman, D. (1965). The effect of nitrogenous fertiliser on the rate of growth of Italian Ryegrass. J. Br. Grassld. Soc. 20, 248–54.CrossRefGoogle Scholar