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Estimation of food intake of sheep grazing green pasture when no free water is available

Published online by Cambridge University Press:  27 March 2009

R. W. Benjamin ,
A. A. Degen ,
A. Breighet ,
M. Chen  and
N. H. Tadmor
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Summary

Two experiments were made to measure the dry-matter intake of grazing sheep. Three groups of five ewes grazed three plots of young barley. The mean daily drymatter intake per ewe from each group was estimated from the water turnover which was measured by the tritium dilution technique. The mean intake was also estimated by the double sampling technique for measuring standing crops. The mean estimate of one technique was within the standard deviation of the mean estimate of the other. The difference between the mean estimates from each technique did not exceed 18 %. It is concluded that water turnover could be useful for the measurement of the intakes of animals grazing green pastures.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 85 , Issue 3 , December 1975 , pp. 403 - 407
Copyright
Copyright © Cambridge University Press 1975

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References

REFERENCES

Arnold, G. W. (1970). Regulation of food intake in grazing animals. In Physiology of Digestion and Metabolism in the Ruminants (ed. Phillipson, A. T.), pp. 264–77. Newcastle upon Tyne: Oriel Press.Google Scholar
Brown, D. (1954). Methods of surveying and measuring vegetation. Bulletin 42, Commonwealth Agricultural Bureau, England, p. 104.Google Scholar
Brown, G. D. & Lynch, J. J. (1972). Some aspects of the water balance of sheep at pasture when deprived of drinking water. Australian Journal of Agricultural Research 23, 669–84.CrossRefGoogle Scholar
Forbes, J. M. (1968). The water intake of ewes. British Journal of Nutrition 22, 33–43.CrossRefGoogle ScholarPubMed
Graham, N. McC. (1966). Predicting the maintenance requirements of sheep. Proceedings of the Australian Society of Animal Production 6, 364–69.Google Scholar
Jones, G. B., Potter, B. J. & Reid, C. S. W. (1970). The effect of saline water ingestion on water turnover rates and tritiated water space in sheep. Australian Journal of Agricultural Research 21, 927–32.CrossRefGoogle Scholar
Macfarlane, W. V., Dolling, C. H. S. & Howard, B. (1966). Distribution and turnover of water in Merino sheep selected for high wool production. Australian Journal of Agricultural Research 17, 491–502.CrossRefGoogle Scholar
Macfarlane, W. V. & Howard, B. (1970). Water in the physiological ecology of ruminants. In Physiology of Digestion and Metabolism in the Ruminants (ed. Phillipson, A. T.), pp. 362–74. Newcastle upon Tyne: Oriel Press.Google Scholar
Macfarlane, W. V. & Howard, B. (1972). Comparative water and energy economy of wild and domestio animals. In Comparative Physiology of Desert Animals (ed. Maloiy, G. M. O.), pp. 261–96. London: Academic Press.Google Scholar
National Academy of Science National Research Council (1962). Range research basic problems in technique. Publication 890, Washington, D.C.Google Scholar
Nichols, G. De La M. (1965). Radio transmission of sheep's jaw movements. New Zealand Journal of Agricultural Research 9, 468–73.CrossRefGoogle Scholar
Siebert, B. D. (1971). Growth and water metabolism of cows and progeny on fertilized and unfertilized tropical pastures. Australian Journal of Agricultural Research 22, 415–28.CrossRefGoogle Scholar
Spedding, C. R. W. (1969). The agricultural ecology of grassland. Agricultural Progress 44, 7–23.Google Scholar
Till, A. R. & Downes, A. M. (1962). The measurement of total body water in the sheep. Australian Journal of Agricultural Research 13, 335–42.CrossRefGoogle Scholar