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The effect of the reproductive state of ewes on their voluntary intake of diets varying in straw content

Published online by Cambridge University Press:  27 March 2009

J. B. Owen ,
R. F. Lee ,
P. M. Lerman  and
E. L. Miller
J. B. Owen
Affiliation:
Department of Applied Biology, University of Cambridge
R. F. Lee
Affiliation:
Department of Applied Biology, University of Cambridge
P. M. Lerman
Affiliation:
Department of Applied Biology, University of Cambridge
E. L. Miller
Affiliation:
Department of Applied Biology, University of Cambridge
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Summary

Two experiments, involving a total of 112 sheep, are described, in which ewes at different reproductive states were given complete diets with a varying grain: straw ratio. In Expt 1 ewes at three reproductive states (dry, pregnant and lactating) were given diets with four levels of coarsely ground oat straw (10, 25, 40 and 55% straw). In Expt 2 ewes in five reproductive states (early pregnancy, mid pregnancy, late pregnancy, lactation and dry) were given a basal diet similar to that given in Expt 1 but with five levels of straw (15, 25, 36, 45 and 55% straw).

The results showed that the intake of ewes varied with reproductive state, the highest intakes occurring during lactation. No significant diet × reproductive state interaction was observed which suggests that in ewes the physiological state can override some of the physical limitations to intake imposed by increased dietary roughage concentration.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 94 , Issue 3 , June 1980 , pp. 637 - 644
Copyright
Copyright © Cambridge University Press 1980

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References

Balch, C. C. (1950). Factors affecting the utilisation of food by dairy cows. 1. Rate of passage of food through the digestive tract. British Journal of Nutrition 4, 361–388.Google Scholar
Balch, C. C. & Campling, R. C. (1962). Regulation of voluntary food intake in ruminants. Nutrition Abstracts and Reviews 32, 669–686.Google Scholar
Ben, Saud S. (1970). The intake and utilisation of food and water by ruminants. Ph.D. thesis, University of Cambridge.Google Scholar
Bines, J. A. (1971). The influence of fatness on food intake in the dairy cow. Proceedings of the 4th International Symposium on Control of Food and Water Intake, Cambridge.Google Scholar
Forbes, J. M. (1977). Interrelationships between physical and metabolic control of voluntary food intake in fattening, pregnant and lactating mature sheep: a model. Animal Production 24, 91–101.Google Scholar
Hadjipieris, G. & Holmes, W. (1966). Studies on feed intake and feed utilization by sheep. 1. Voluntary food intake of dry, pregnant and lactating ewes. Journal of Agricultural Science, Cambridge 66, 217.Google Scholar
Hutton, J. B. (1963). The effeot of lactation on intake in the dairy cow. Proceedings of the New Zealand Society of Animal Production 23, 39–52.Google Scholar
Lee, R. F. (1974). Effect of physiological state upon voluntary intake of Ruminantia. Ph.D. thesis, University of Cambridge.Google Scholar
Mayer, J. (1955). The rôle of exercise and activity in weight control. Weight Control 17, 199–210, Iowa State College Press.Google Scholar
Owen, J. B. (1976).Sheep Production. London: Baillière Tindall.Google Scholar
Owen, J. B. & Ingleton, J. W. (1963). A study of food intake and production in grazing ewes. II. The interrelationships between food intake and productive output. Journal of Agricultural Science, Cambridge 61, 329–340.CrossRefGoogle Scholar
Owen, J. B., Miller, E. L. & Bridge, P. S. (1971). Complete diets given ad libitum to dairy cows: the effect of straw oontent and cubing the diet. Journal of Agricultural Science, Cambridge 77, 195–202.Google Scholar
Owen, J. B. & Ridgman, W. J. (1967). The effect of dietary energy content on the voluntary intake of pigs. Animal Production 9, 107–114.Google Scholar
Owen, J. B., Ridgman, W. J. & Wyllie, D. W. (1971). The effect of food restriction on subsequent voluntary intake of pigs. Animal Production 13, 537–546.Google Scholar
Patterson, H. D. (1950). The analysis of change-over trials. Journal of Agricultural Science, Cambridge 40, 375–380.CrossRefGoogle Scholar
Patterson, H. D. (1951). Change-over trials. Journal of the Royal Statistical Society B 13, 256–271.Google Scholar