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The yield and composition of the milk of Finnish Landrace × Blackface ewes: II. Ewes and lambs grazed on pasture

Published online by Cambridge University Press:  27 March 2009

J. N. Peart ,
R. A. Edwards  and
Elizabeth Donaldson
J. N. Peart
Affiliation:
The Hill Farming Research Organisation, Bush Estate, Penicuik, Midlothian EH26 OPY
R. A. Edwards
Affiliation:
The Edinburgh School of Agriculture
Elizabeth Donaldson
Affiliation:
The Edinburgh School of Agriculture
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Summary

The milk production of 14 Finnish Landrace × Blackface ewes suckling either single, twin or triplet lambs was recorded while they were wholly maintained on a high-quality grazed pasture. Intravenous administration of oxytocin followed by hand milking was used to estimate milk production within 4 days of parturition and then at weekly intervals during a 12-week lactation period. At each milking the milk from each ewe was retained for analysis. Herbage samples for analysis were cut by hand shears at weekly intervals at a height simulating the harvesting by the sheep. In vitro analysis showed a decline in the digestible organic matter in the herbage from approximately 75% in the early stages, to around 67% at the end of lactation. The percentage crude protein in the dry matter of the herbage was variable but tended to increase towards the end of the lactation period. The estimated mean total milk production values were 125, 176 and 193 kg for single-, twin- and triplet-suckled groups of ewes, respectively. Almost all of the difference in total yield between the groups of multiplesuckled ewes occurred in the first 4 weeks of lactation. Analysis of variance showed no significant differences between suckling groups in the concentration of any of the milk constituents. Regression analysis showed significant evidence for differences between the linear and quadratic components of the regressions on stage of lactation for the suckling groups only in respect of daily milk yield, energy and protein production. The concentration of constituents other than lactose was higher in colostral milk but the differences were statistically significant only in respect of energy, total solids and fat. The lactose content of ordinary milk was significantly higher than that of colostral milk. The mean daily live-weight gains of the single- and twin-suckled lambs were significantly greater than that of the triplet-suckled group.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 85 , Issue 2 , October 1975 , pp. 315 - 323
Copyright
Copyright © Cambridge University Press 1975

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References

REFERENCES

Alexander, R. H. & McGowan, M. (1966). The routine determination of in vitro digestibility of organic matter in forages – an investigation of the problems associated with continuous large-scale operation. Journal of the British Grassland Society 21, 140–7.CrossRefGoogle Scholar
Barnicoat, C. R., Logan, A. G. & Grant, A. I. (1949). Milk seoretion studies with New Zealand Romney ewes. Journal of Agricultural Science, Cambridge 39, 44–5, 237–48.CrossRefGoogle Scholar
Bath, I. H. & Rook, J. A. F. (1965). The evaluation of cattle foods and diets in terms of the ruminal concentration of volatile fatty acids. Journal of Agricultural Science, Cambridge 64, 67–75.Google Scholar
British Standard 1741 (1963). Methods for the Chemical Analysis of Liquid Milk and Cream. British Standards Institute, London.Google Scholar
British Standard 696, PT. II (1969). Gerber Metliod for the Determination of Fat in Milk and Milk Products. British Standards Institute, London.Google Scholar
Clancy, M. J. & Wilson, R. K. (1966). Development and application of a new chemical method for predicting the digestibility and intake of herbage samples. Proceedings of the 10th International Grassland Congress, Helsinki, pp. 445–53.Google Scholar
Corbett, J. L. (1968). Variation in the yield and composition of milk of grazing Merino ewes. Australian Journal of Agricultural Research 19, 283–94.CrossRefGoogle Scholar
Hinton, C. L. & Macara, T. (1927). The determination of aldose sugars by means of chloramine-T, with special reference to the analysis of milk products. Analyst, London 52, 668–88.CrossRefGoogle Scholar
Jeeferies, B. C. (1961). Body condition scoring and its use in management. Tasmanian Journal of Agricultural Research 32, 19–21.Google Scholar
Langlands, J. P. (1972). Growth and herbage consumption of grazing Merino and Border Leicester lambs reared by their mothers or fostered by ewes of the other breed. Animal Production 14, 317–32.Google Scholar
McCance, I. (1959). The determination of milk yield in the Merino ewe. Australian Journal of Agricultural Research 10, 839–53.CrossRefGoogle Scholar
McDonald, P., Edwards, R. A. & Greenhalgh, J. F. D. (1973). Animal Nutrition, 2nd ed.Edinburgh: Oliver & Boyd.Google Scholar
Moore, R. W. (1966). Genetic factors affecting the milk intake of lambs. Australian Journal of Agricultural Research 17, 191–9.Google Scholar
Munro, J. (1955). Studies on the milk yield of Scottish Blackface ewes. Journal of Agricultural Science, Cambridge 46, 131–6.CrossRefGoogle Scholar
Peart, J. N. (1968). Lactation studies with Blackface ewes and their lambs. Journal of Agricultural Science, Cambridge 70, 87–94.CrossRefGoogle Scholar
Peart, J. N. (1970). The influence of live weight and body condition on the subsequent milk production of Blackface ewes following a period of undernourishment in early lactation. Journal of Agricultural Science, Cambridge 75, 459–69.Google Scholar
Peart, J. N., Doney, J. M. & Macdonald, A. J. (1975). The influence of lamb genotype on the milk production of Blackface ewes. Journal of Agricultural Science, Cambridge 84, 313–16.CrossRefGoogle Scholar
Peart, J. N., Edwards, R. A. & Donaldson, E. (1972). The yield and composition of the milk of Finnish Landrace x Blackface ewes. I. Ewes and lambs maintained indoors. Journal of Agricultural Science, Cambridge 79, 303–13.CrossRefGoogle Scholar
Poulton, S. G. & Ashton, W. M. (1970). A study of the composition of Clun Forest ewe's milk. IV. The proteins of ewe's milk and their variation with stage of lactation. Journal of Agricultural Science, Cambridge 75, 245–50.CrossRefGoogle Scholar
Rook, J. A. F. & Balch, C. C. (1961). The effects of intraruminal infusions of acetic, propionic and butyric acids on the yield and composition of the milk of the cow. British Journal of Nutrition 15, 361–9.CrossRefGoogle ScholarPubMed