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A comparison of the sown swards of perennial ryegrass S. 24 and Italian ryegrass RvP in a two-year lamb production system, with different breeds of sheep

Published online by Cambridge University Press:  27 March 2009

J. E. Newton ,
N. E. Young  and
R. J. Orr
J. E. Newton
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berks.
N. E. Young
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berks.
R. J. Orr
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berks.
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Summary

A comparison was made between an intensive system of lamb production based on Italian ryegrass RvP and one based on perennial ryegrass S. 24, over 2 years, each at three stocking rates (14, 17, 20 ewes/ha). More grass was grown in the first year than in the second when the yield of RvP was particularly reduced. The ewes and lambs ate more RvP than S. 24 but there was no difference in lamb growth rate. The lambs grew faster at the low stocking rate from 0 to 18 weeks and from 0 to slaughter than at the medium and high stocking rates, in both years. Ewe intake and lamb growth rate were higher in the second year than the first. The Masham ewes with two lambs ate significantly more grass per unit of body weight than the Finnish Landrace × Scottish Halfbred and Finnish Landrace × Scottish Blackface ewes, and their lambs grew significantly faster. It was concluded that for an intensive system of lamb production from grass, S. 24 was more suitable than RvP.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 87 , Issue 3 , December 1976 , pp. 605 - 616
Copyright
Copyright © Cambridge University Press 1976

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References

Allden, W. G. (1968). Pasture growth, grazing management and animal production. Proceedings of the Australian Grassland Conference, Perth 2, 213–22.Google Scholar
Brougham, R. W. & Harris, W. (1967). Rapidity and extent of changes in genotypic structure induced by grazing in a ryegrass population. New Zealand Journal of Agricultural Research 10, 56–65.CrossRefGoogle Scholar
Davidson, J. L. (1968). Growth of grazed plants. Proceedings of the Australian Grassland Conference, Perth 2, 125–37.Google Scholar
Frame, J. (1966). The evaluation of herbage production under cutting and grazing regimes. 10th International Grassland Congress, Finland, pp. 291–7.Google Scholar
Hodgson, J. & Rodriguez, J. M. (1971). The measurement of herbage intake in grazing studies. Annual Report of the Grassland Research Institute, Hurly, 1970, pp. 132–40.Google Scholar
Kilkenny, J. B. (1972). M.L.C. Sheep Improvement Services Records Report No. 4, p. 58.Google Scholar
Newton, J. E., Young, N. E. & Betts, J. E. (1974). Lamb production from temporary grassland. Technical Report No. 15, Grassland Research Institute, Hurley, 71 pp.Google Scholar
Osbourn, D. F. (1970). The voluntary intake of forage crops by sheep. Ph.D. Thesis, University of Reading.Google Scholar
Rossiter, R. C. (1968). Agronomic data. Proceedings of the Australian Grassland Conference, Perth 2, 13–24.Google Scholar
Stewart, R. H. & Camlin, M. S. (1972). Italian ryegrass – recommended varieties. Agriculture in Northern Ireland 46, 410–13.Google Scholar
Ulyatt, M J. (1971). Studies on the causes of the differences in pasture quality between perennial ryegrass, short-rotation ryegrass and white clover. New Zealand Journal of Agricultural Research 14, 352–67.CrossRefGoogle Scholar
Ulyatt, M. J., Barclay, P. C., Lancashire, J. A. & Armstrong, C. S. M. (1974). The feeding value to sheep of ‘Grasslands Tama’ Westerwolds ryegrass, ‘Grasslands Paroa’ Italian ryegrass, and ‘Grasslands Ruanui’ perennial ryegrass under rotational grazing management. New Zealand Journal of Experimental Agriculture 2, 231–6.CrossRefGoogle Scholar
Young, N. E. & Newton, J. E. (1975). A comparison between rotational grazing and set stocking with ewes and lambs at three stocking rates. Animal Production 21, 303–11.Google Scholar