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Reproductive performance and protein utilization in pregnancy of sheep conceiving at eight months of age

Published online by Cambridge University Press:  02 September 2010

J. J. Robinson ,
C. Fraser ,
Elizabeth L. Corse  and
J. C. Gill
J. J. Robinson
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
C. Fraser
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
Elizabeth L. Corse
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
J. C. Gill
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
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Summary

Twenty-one Finnish Landrace × Polled Dorset Horn female sheep approximating 8 months old were individually penned from 3 to 4 weeks after mating until parturition. They were allocated to one of three diets containing either 12·3, 14·1 or 16·5% crude protein and 2·1 Meal metabolizable energy per kg dry matter, offered at a level of 85 g/kg W0·75 per day. A series of nitrogen balance trials was carried out on all lambs during the last 100 days of gestation.

The mean age at parturition was 382 days and the mean litter size 1·52. The live-weight gain (mean value 152 g/day) was not significantly affected by the level of protein intake. There was a tendency (005 < P < 0·10 for singletons) for lamb birth weight to decrease and the body-weight change of the dam to increase with increasing protein concentration in the diet. There was a significant linear increase in nitrogen retention both with stage of gestation and level of protein intake.

The partition of nitrogen between the foetal and maternal body is discussed in relation to the estimated nitrogen content of the maternal live-weight gain.

Type
Research Article
Information
Animal Production , Volume 13 , Issue 4 , November 1971 , pp. 653 - 660
Copyright
Copyright © British Society of Animal Science 1971

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References

REFERENCES

Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. Agricultural Research Council, London.Google Scholar
Blaxter, K. L., Wainman, F. W., Dewey, P. J. S., Davidson, J., Denerley, H. and Gunn, J. B. 1971. The effect of nitrogenous fertilizer on the nutritive value of artificially dried grass. J. agric. Sci., Camb. 75: 307–319.CrossRefGoogle Scholar
Coop, I. E. and Clark, V. R. 1955. The influence of method of rearing as hoggets on the lifetime productivity of sheep. N.Z. Jl Sci. Technol. 37: 214–228.Google Scholar
Donald, H. P. and Read, J. L. 1967. The performance of Finnish Landrace sheep in Britain. Anim. Prod. 9: 471–476.Google Scholar
Donald, H. P., Read, J. L. and Russell, W. S. 1970. Influence of litter size and breed of sire on carcass weight and quality of lambs. Anim. Prod. 12: 281–290.Google Scholar
Elsley, F. W. H., Anderson, D. M., McDonald, I., MacPherson, R. M. and Smart, R. 1966. A comparison of the live-weight changes, nitrogen retention and carcass composition of pregnant and non-pregnant gilts. Anim. Prod. 8: 391–400.Google Scholar
Forbes, T. J. and Robinson, J. J. 1969. A study of the energy requirements of weaned lambs. Anim. Prod. 11: 389–397.Google Scholar
Graham, N. McC. 1964. Energy exchanges of pregnant and lactating ewes. Aust. J. agric. Res. 15: 127–141.Google Scholar
Langlands, J. P. and Sutherland, H. A. M. 1968. An estimate of the nutrients utilized for pregnancy by Merino sheep. Br. J. Nutr. 22: 217–227.CrossRefGoogle ScholarPubMed
Large, R. V. 1970. The biological efficiency of meat production in sheep. Anim. Prod. 12: 393–401.Google Scholar
Robinson, J. J. and Forbes, T. J. 1967. A study of the protein requirements of the mature breeding ewe. 2. Protein utilization in the pregnant ewe. Br. J. Nutr. 21: 879–891.CrossRefGoogle ScholarPubMed
Robinson, J. J., Fraser, C., Corse, Elizabeth L. and Gill, J. C. 1970. The effect of pattern of protein intake and level of energy intake on the performance and nitrogen utilization of the ewe. J. agric. Sci., Camb. 75: 403–411.CrossRefGoogle Scholar
Rombauts, P. 1962. Evolution de l'anabolisme gravidique chez la truie en function de l'age de l'aminal. Annls Zootech. 11: 39–51.CrossRefGoogle Scholar
Wainman, F. W., Blaxter, K. L. and Pullar, J. D. 1970. The nutritive value for ruminants of a complete processed diet based on barley straw. J. agric. Sci., Camb. 74: 311–314.CrossRefGoogle Scholar
Wallace, L. R. 1948. Growth of lambs before and after birth in relation to the level of nutrition. J. agric. Sci., Camb. 38: 243–302.CrossRefGoogle Scholar
Williams, S. M. 1954. Fertility in Clun Forest sheep. J. agric. Sci., Camb. 45: 202–228.CrossRefGoogle Scholar
Yalcin, B. C. and Bichard, M. 1964. Crossbred sheep production. 1. Factors affecting production from the crossbred ewe flock. Anim. Prod. 6: 73–84.Google Scholar