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The effect of level of water intake on some aspects of digestion and nitrogen metabolism of the ‘desert sheep’ of the Sudan

Published online by Cambridge University Press:  27 March 2009

H. Elsayed Osman  and
B. Fadlalla
H. Elsayed Osman
Affiliation:
Faculty of Agriculture, University of Khartoum, Sudan
B. Fadlalla
Affiliation:
Faculty of Agriculture, University of Khartoum, Sudan
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Summary

Five successive trials were conducted using eight adult rams (Sudan desert sheep) to study the effect of restriction of water intake on some aspects of digestion and nitrogen metabolism. The feeds used in this study were berseem hay (Medicago sativa), lubia hay (Dolichos lablab), maize hay (Zea mais), a concentrate mixture, and dry desert grasses (hummra) (a mixture of Dactyloctenium aegyptium, Schoenefeldia gracilis, Eragrostis pilosa, Aristida funiculata and Aristida spp.).

Restriction of water did not affect the digestibility coefficients of organic matter, crude protein and crude fibre significantly. The digestibility coefficient of ether extract was significantly reduced whereas that of nitrogen-free extract was slightly higher when water was restricted.

The concentrations of ammonia and volatile fatty acids in the rumen and of urea in the blood were recorded before and 3 h after feeding. Increases in rumen ammonia and blood urea nitrogen concentration were reduced by water restriction except when hummra was fed.

Restriction of water intake also slightly increased the in vitro rate of fermentation of rumen contents which is taken as a measure of microbial activity in the rumen, and the retention of nitrogen. These results are interpreted as indications of more efficient nitrogen utilization under conditions of water restriction.

There were no significant effects of the treatments on changes in the concentration of volatile fatty acids.

The significance of these findings in relation to the management of desert sheep in the arid parts of the Sudan is discussed with special reference to the effect of the level of dry-matter intake on nitrogen balance.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 82 , Issue 1 , February 1974 , pp. 61 - 69
Copyright
Copyright © Cambridge University Press 1974

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References

REFERENCES

A.O.A.C. (1955). Official Methods of Analysis of the Association of Official Agricultural Chemists. Washington, D.C.Google Scholar
Abou Akkada, A. R. & El-Shazly, K. (1958). Studies on the nutritive value of some common Egyptian feeding stuffs. II. Effect of concentrates rich in protein on cellulose and dry matter digestion. Journal of Agricultural Science, Cambridge. 51, 175.Google Scholar
Abou Akkada, A. R. & El-Shazly, K. (1964). Effect of absence of ciliate protozoa from the rumen on microbial activity and growth of lambs. Applied Microbiology 12, 384.CrossRefGoogle Scholar
Abou Akkada, A. R. & El-Shazly, K. (1965). Effect of presence or absence of rumen ciliate protozoa on some blood components, nitrogen retention, and digestibility of food constituents in lambs. Journal of Agricultural Science, Cambridge 64, 231.Google Scholar
Abou Akkada, A. R. & Osman, H. Elsayed (1967). The vise of ruminal ammonia and blood urea as an index of the nutritive value of protein in some food stuffs. Journal of Agricultural Science, Cambridge 69, 25.CrossRefGoogle Scholar
Brown, L. D. (1966). Influence of intake on feed utilization. Journal of Dairy Science 49, 223–37.CrossRefGoogle Scholar
French, M. H. (1956). The effect of infrequent water intake on the consumption and digestibility of hay by zebu cattle. Empire Journal of Experimental Agriculture 24, 128–36.Google Scholar
Harrison, M. N. & Jackson, J. K. (1958). Ecological classification of the vegetation of the Sudan. Forestry Bulletin of the Ministry of Agriculture, Sudan (N.S.), no. 2.Google Scholar
Larsen, C., Hungerford, E. H. & Bailey, D. E. (1917). The role of water in a dairy cow's ration. Bulletin of the South Dakota Agricultural Experiment Station.Google Scholar
Livingstone, H. G., Payne, W. J. A. & Friend, M. T. (1962). Urea excretion in ruminants. Nature, London 194, 1057–8.CrossRefGoogle Scholar
Livingstone, H. G., Payne, W. J. A. & Friend, M. T. (1904). Nitrogen metabolism of cattle in East Africa. I. The problem and experimental procedure. Journal of Agricultural Science, Cambridge 62, 313–19.CrossRefGoogle Scholar
Osman, H. Elsayed & Danasouby, M. S. (1963). The nutritive value of Borseem (Medicago sativa) under Sudan conditions. Empire Journal of Experimental Agriculture 31, 27.Google Scholar
Payne, W. J. A. (1964). Specific problems of semi-arid environments. Proceedings of the Vlth International Congress of Nutrition, Edinburgh, 1963, pp. 213–26. Edinburgh and London: E. and S. Livingstone.Google Scholar
Payne, W. J. A. (1966). Nutrition of ruminants in the tropics. Nutrition Abstracts and Reviews 36, 635–70.Google ScholarPubMed
Phillips, G. D. (1961). Physiological comparisons of European and Zebu steers. II. Effects of restricted water intake. Research of Veterinary Science, 2, 209–16.CrossRefGoogle Scholar
Playne, M. J. (1968). The effect of level of feeding on the intake and digestibility of a tropical grass by sheep. Journal of the Australian Institute of Agricultural Science 34, 167–8.Google Scholar
Raymond, W. F., Harris, C. E. & Kemp, C. D. (1955). Studios in the digestibility of herbage. 6. The effect of level of herbage intake on the digestibility of herbage by sheep. Journal of the British Grassland Society 10, 19–26.CrossRefGoogle Scholar
Raymond, W. F., Minson, D. J & Harris, C. E. (1959). Studies in the digestibility of herbage. 7. Further evidence on the effect of level of intake on the digestive efficiency of sheep. Journal of the British Grassland Society 14, 75–7.CrossRefGoogle Scholar
Schmidt-Nielsen, B. & Osaki, H. (1958). Renal responses to changes in nitrogen metabolism in sheep. American Journal of Physiology 193, 657–61.CrossRefGoogle ScholarPubMed
El-Shazly, K. (1958). Studies on the nutritive value of some common Egyptian feeding stuffs. I. Nitrogen retention and ruminal ammonia curves. Journal of Agricultural Science, Cambridge 51, 149.CrossRefGoogle Scholar
El-Shazly, K., Abotj Axkada, A. R. & Naga, M. M. A. (1963). The use of in vitro fermentation to estimate the digestive energy content of some Egyptian forages. II. The in vitro production of total volatile fatty acids and organic acids as criteria of energy content. Journal of Agricultural Science, Cambridge 61, 109.CrossRefGoogle Scholar
El-Shazly, K. & Hungate, R. E. (1965). Fermentation capacity as a measure of net growth of rumen microorganisms. Applied Microbiology 13, 62–9.CrossRefGoogle ScholarPubMed
Thornton, R. F. & Yates, N. G. (1968). Some effects of water restriction on apparent digestibility and water excretion of cattle. Australian Journal of Agricultural Research 19, 665–72.CrossRefGoogle Scholar
Utley, P. R., Bradley, N. W. & Boling, J. A. (1970). Effect of water restriction on nitrogen metabolism in bovine fed two levels of nitrogen. Journal of Nutrition 100, 551–6.CrossRefGoogle ScholarPubMed