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Intakes of silages, hays and straws by ewes in mid pregnancy

Published online by Cambridge University Press:  02 September 2010

R. J. Orr  and
T. T. Treacher
R. J. Orr
Affiliation:
AFRC Institute for Grassland and Animal Production, Hurley, Maidenhead SL6 SLR
T. T. Treacher
Affiliation:
AFRC Institute for Grassland and Animal Production, Hurley, Maidenhead SL6 SLR
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Abstract

In three experiments, seven grass silages, four grass hays and winter barley straw, with and without anhydrous ammonia treatment, were offered ad libitum to a total of 134 Finn Dorset ewes in weeks 11 to 15 of pregnancy and intakes were measured. The untreated straw diet was supplemented with 300 g fresh weight of concentrates per ewe. Number of foetuses carried did not affect intakes in mid pregnancy. Organic matter digestibilities measured in vivo in week 15, ranged from 0·39 to 0·69 for hays and 0·53 to 0·79 for silages. Generally, between weeks 11 to 15 of pregnancy, hay intakes showed either little change or slight increases whereas intakes of silages or straws showed little change or slight decreases. Forage intake was higher on the better quality hays and silages and ewes gained weight and body condition, compared with losses for the poorer diets. In late pregnancy, the ewes were offered grass silage ad libitum and rations of concentrates according to a rationing programme. There were no residual effects of the mid-pregnancy treatments on lamb birth weights but ewes offered the poorer diets in mid pregnancy still tended to be lighter and thinner post partum. Equations are presented to predict the intakes of hays and silages from food and animal factors.

Keywords

haypregnancysheepsilagestraw
Type
Research Article
Information
Animal Production , Volume 51 , Issue 2 , October 1990 , pp. 301 - 310
Copyright
Copyright © British Society of Animal Science 1990

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References

REFERENCES

Apolant, S. M. and Chestnutt, D. M. B. 1985. The effect of mechanical treatment of silage on intake and production of sheep. Animal Production 40: 287–296.Google Scholar
Bhargava, P. K., Ørskov, E. R. and Walli, T. K. 1988. Rumen degradation of straw. 4. Selection and degradation of morphological components of barley straw by sheep. Animal Production 47: 105–110.Google Scholar
Chestnutt, D. M. B. 1989. The effect of contrasting silages offered in mid and late pregnancy on the performance of breeding ewes. Animal Production 49: 435–441.Google Scholar
Dewar, W. A. and McDonald, P. 1964. Determination of dry matter in silage by distillation with toluene. Journal of the Science of Food and Agriculture 12: 790–795.CrossRefGoogle Scholar
Forbes, J. M. 1968. The physical relationships of the abdominal organs in the pregnant ewe. Journal of Agricultural Science, Cambridge 70: 171–177.CrossRefGoogle Scholar
Forbes, J. M. 1969. The effect of pregnancy and fatness on the volume of rumen contents in the ewe. Journal of Agricultural Science, Cambridge 72: 119–121.Google Scholar
Forbes, T. J. and Singleton, A. G. 1964. Ovine pregnancy toxaemia: a review. British Veterinary Journal 120: 56–68.Google Scholar
Makela, A. 1956. Studies on the question of bulk in the nutrition of farm animals with special reference to cattle. Ada Agralia Fennica 85: 1–130.Google Scholar
Meat And Livestock Commission. 1983. Feeding theEwe. Sheep Improvement Services, Meat and Livestock Commission, Bletchley.Google Scholar
Neal, H. D. ST C, France, J., Orr, R. J. and Treacher, T. T. 1985. A model to maximize hay intake when formulating rations for pregnant ewes. Animal Production 40: 93–100.Google Scholar
Neal, H. D. ST C, Treacher, T. T. and Orr, R. J. 1986. Developing and using a computer program to ration ewes during late pregnancy. In Science and Quality Lamb Production (ed. Hardcastle, J. E. Y.), pp. 10–11. Agricultural and Food Research Council, London.Google Scholar
Orr, R. J., Newton, J. E. and Jackson, C. A. 1983. The intake and performance of ewes offered concentrates and grass silage in late pregnancy. Animal Production 36: 21–27.Google Scholar
Orr, R. J. and Treacher, T. T. 1984. The effect of concentrate level on the intake of hays by ewes in late pregnancy. Animal Production 39: 89–98.Google Scholar
Orr, R. J. and Treacher, T. T. 1989. The effect of concentrate level on the intake of grass silages by ewes in late pregnancy. Animal Production 48: 109–120.Google Scholar
Orr, R. J. and Treacher, T. T. 1990. The performance of ewes offered- diets containing different proportions of perennial ryegrass and white clover silage in late pregnancy. Animal Production 51: 143–153.Google Scholar
Orr, R. J., Treacher, T. T. and Mason, V. C. 1985. The effect of ammonia treatment on the intake of straw and hay when offered with rations of concentrates to ewes in late pregnancy. Animal Production 40: 101–109.Google Scholar
Robinson, J. J. 1983. Nutrition of the pregnant ewe. In Sheep Production (ed. Haresign, W.), pp. 111–131. Butterworths, London.Google Scholar
Robinson, J. J., McDonald, I., Fraser, C. and Crofts, R. M. J. 1977. Studies on reproduction in prolific ewes. 1. Growth of the products of conception. Journal of Agricultural Science, Cambridge 88: 539–552.CrossRefGoogle Scholar
Russel, A. J. F., Doney, J. M. and Gunn, R. G. 1969. Subjective assessment of body fat in live sheep. Journal of Agricultural Science, Cambridge 72: 451–454.CrossRefGoogle Scholar
Silva, A. T., Greenhalgh, J. F. D. and ørskov, E. R. 1989. Influence of ammonia treatment and supplementation on the intake, digestibility and weight gain of sheep and cattle on barley straw diets. Animal Production 48: 99–108.Google Scholar
Thomas, C. and Thomas, P. C. 1985. Factors affecting the nutritive value of grass silages. In Recent Advances in Animal Nutrition — 1985 (ed. Haresign, W. and Cole, D. J. A.), pp. 223–256. Butterworths, London.CrossRefGoogle Scholar
Tilley, J. M. A. and Terry, R. A. 1963. A two-stage technique for the in vitro digestion of forage crops. Journal of the British Grassland Society 18: 104–111.CrossRefGoogle Scholar
Wilkins, R. J., Hutchinson, K. J., Wilson, R. F. and Harris, C. E. 1971. The voluntary intake of silage by sheep. 1. Interrelationships between silage composition and intake. Journal of Agricultural Science, Cambridge 77: 531–537.CrossRefGoogle Scholar
Wilkinson, J. M. 1988. Sampling and analysing silage. In Silage UK. 5th ed. (ed. Wilkinson, J. M.), pp. 151–153. Chalcombe Publications, Mariow.Google Scholar
Wilkinson, S. C. and Chestnutt, D. M. B. 1988. Effect of level of food intake in mid and late pregnancy on the performance of breeding ewes. Animal Production 47: 411–419.Google Scholar
Woolford, M. K. 1972. Some aspects of the microbiology and biochemistry of silage making. Herbage Abstracts 42: 105–111.Google Scholar