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The effect of dietary crude protein concentration and time of weaning on milk production and body-weight change in the ewe

Published online by Cambridge University Press:  02 September 2010

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

Twenty-seven North Country Cheviot ewes, each carrying twin foetuses and having a mean body weight at 6 weeks prior to parturition of 81 kg were individually penned and offered a constant daily intake of 16·75 MJ metabolizable energy during the last 6 weeks of gestation. At parturition the ewes were allocated to one of three dried grass/concentrate diets containing (1) 10·3, (2) 13·6 or (3) 16·9 % crude protein (CP) and 10 MJ metabolizable energy (ME) per kg. The mean daily CP intakes for diets 1 to 3 were 273, 340 and 415 g respectively and the mean daily ME intake was 25 MJ. Within each level of dietary CP intake the lambs were weaned at either 25, 35 or 41 days of age.

There were no significant diet × stage of weaning interactions in milk yield or ewe body-weight change during lactation. The mean daily levels of milk production were 2·4, 2·9 and 3·1 kg for diets 1 to 3 respectively. The corresponding values for ewe body-weight loss were 118, 170 and 265 g per day. When the diet contained 13·8% CP the incremental increase in milk production per unit increase in protein intake was 4·2 g/g. This gave an incremental increase in lamb growth rate of 0·79 g/g and was equivalent to the associated incremental increase in ewe body-weight loss.

A reduction in the concentration of CP in the ewes' diet when the lambs are 3 weeks of age may be a useful practical procedure for decreasing milk production and for reducing the body-weight loss of the ewe in a frequent breeding system.

Type
Research Article
Information
Animal Production , Volume 19 , Issue 3 , December 1974 , pp. 331 - 339
Copyright
Copyright © British Society of Animal Science 1974

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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
Association of Official Agricultural Chemists. 1965. Methods of Analysis. 10th ed. Association of Official Agricultural Chemists, Washington, D.C.Google Scholar
Blaxter, K. L. 1966. The feeding of dairy cows for optimal production. George Scott Robertson Memorial Lecture, Queen's University, Belfast.Google Scholar
British Standards Institution. 1955. Gerber method for the determination of fat in milk and milk products. Br. Stand. Instn Rep. 696, Pt. 2, p. 7.Google Scholar
Broster, W. H. 1972. Effect on milk yield of the cow of the level of feeding during lactation. Dairy Sci. Abstr. 34: 265–288.Google Scholar
Broster, W. H. 1973. Protein—energy interrelationships in growth and lactation of cattle and sheep. Proc. Nutr. Soc. 32: 115–122.CrossRefGoogle ScholarPubMed
Flatt, W. P. 1966. Energy metabolism results with lactating dairy cows. J. Dairy Sci. 49: 230–237.CrossRefGoogle Scholar
Gordon, F. J. and Forbes, T. J. 1970. The associative effect of level of energy and protein intake in the dairy cow. J. Dairy Res. 37: 481–491.CrossRefGoogle Scholar
Hadjipieris, G. and Holmes, W. 1966. Studies on feed intake and feed utilization by sheep. 1. The voluntary feed intake of dry, pregnant and lactating ewes. J. agric. Sci., Camb. 66: 217–223.CrossRefGoogle Scholar
Hadjipieris, G., Jones, J. G. W., Wimble, R. H. and Holmes, W. 1966. Studies on feed intake and feed utilization by sheep. 2. The utilization of feed by ewes. J. agric. Sci., Camb. 66: 341–349.CrossRefGoogle Scholar
Hogue, D. E. 1967. Protein requirements of lactating ewes. Proc. Cornell Nutr. Conf., pp. 118–122.Google Scholar
Large, R. V. 1970. The biological efficiency of meat production in sheep. Anim. Prod. 12: 393–401.Google Scholar
Ørskov, E. R., Fraser, C. and Gill, J. C. 1973. A note on the effect of time of weaning and weight at slaughter on feed utilization of intensively fed lambs. Anim. Prod. 16: 311–314.Google Scholar
Preston, R. L. 1972. Protein requirements for growing and lactating ruminants. Proc. Univ. Nottingham 6th Nutr. Conf. Feed Manfrs, pp. 22–37.Google Scholar
Robinson, J. J. and Forbes, T. J. 1970. Studies on protein utilization by ewes during lactation. Anim. Prod. 12: 601–610.Google Scholar
Robinson, J. J., Foster, W. H. and Forbes, T. J. 1968. An assessment of the variation in milk yield of ewes determined by the lamb-suckling technique. J. agric. Sci., Camb. 70: 187–194.CrossRefGoogle Scholar
Robinson, J. J., Foster, W. H. and Forbes, T. J. 1969. The estimation of the milk yield of a ewe from body-weight data on the suckling lamb. J. agric. Set., Camb. 72: 103–107.CrossRefGoogle Scholar
Robinson, J. J., Fraser, C. and Corse, Elizabeth L. 1971. The energy requirements for live-weight maintenance and gain in barren, single and twin-bearing ewes. Theme VII. Preliminary presentation report. Xth Int. Congr. Anim. Prod., Versailles.Google Scholar
Robinson, J. J., Fraser, C. and Gill, J. C. 1972. Preliminary observations on the performance of Finnish Landrace × Dorset Horn ewes in an intensive system. Proc. Br. Soc. Anim. Prod. (New series) 1: 134 (Abstr.).Google Scholar
Robinson, J. J., Fraser, C. and Gill, J. C. 1973. The effect of dietary crude protein intake and stage of weaning on ewe milk production and lamb creep feed intake. Proc. Br. Soc. Anim. Prod. (New series) 2: 84 (Abstr.).Google Scholar
Tyrrell, H. F., Moe, P. W. and Flatt, W. P. 1970. In Energy Metabolism of Farm Animals: 5th Symposium Vitznau, (ed. Schurch, A. and Wenk, C.), pp. 69–72. Juris Druck/Verlas, Zurich.Google 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
Wenham, G. and Robinson, J. J. 1972. Radiographic pregnancy diagnosis in sheep. J. agric. Sci., Camb. 78: 233–238.CrossRefGoogle Scholar
Whiting, F., Slen, S. B. and Bezeau, L. M. 1952. The quantity and quality of mature ewe's milk as influenced by level of protein in the ration. Scient. Agric. 32: 365–374.Google Scholar