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The effects of red clover (Trifolium pratense var. redhead), white clover (Trifolium repens var. S 100) or perennial ryegrass (Lolium perenne var. S 23) on the reproductive performance of sheep

Published online by Cambridge University Press:  27 March 2009

J. E. Newton  and
J. E. Betts
J. E. Newton
Affiliation:
Grassland Research Institute, Hurley, Nr. Maidenhead, Berks.
J. E. Betts
Affiliation:
Grassland Research Institute, Hurley, Nr. Maidenhead, Berks.
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Summary

During 3 years, three groups of 20 Scottish half-bred ewes were grazed on perennial ryegrass, white clover or red clover. During this period the two legumes were oestrogenic, in terms of teat-length extension of wethers, but the perennial ryegrass was not. The white clover was only markedly oestrogenic when there was a high proportion of diseased leaves. The mean litter size and lambing percentage of the ewes grazed on red clover was significantly reduced. White clover, although it was oestrogenic, had no effect on mean litter size or lambing percentage. The mean litter size of the ewes on the perennial ryegrass was 2·35, 2·30 and 2·24, on the white clover was 2·20, 2·33 and 2·23 and on the red clover was 1middot;60, 1·67 and 1·78 for the three lambings. Lambing percentage of the ewes on the perennial ryegrass was 175, 225 and 218, on the white clover was 210, 222 and 189, and on the red clover was 160, 128 and 118 for the three lambings. The lambing date of the ewes grazing on the red clover was significantly later at the third lambing.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 80 , Issue 2 , April 1973 , pp. 323 - 327
Copyright
Copyright © Cambridge University Press 1973

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References

Barrett, J. F., George, J. M. & Lamond, R. D. (1965). Reproductive performance of Merino ewes grazing red clover (Trifolium pratense L.), improved pasturo, or native pasture. Aust. J. agric. Res. 16, 189–200.CrossRefGoogle Scholar
Bennett, D., Morley, F. H. W. & Axelsen, A. (1967). Bioassay responses of ewes to legume swards. II. Uterine weight results from swards. Aust. J. agric. Res. 18, 495–504.CrossRefGoogle Scholar
Engle, P. H., Bell, D. S. & Davis, R. R. (1957). The effect of ladino clover, Birdsfoot trefoil and bluegrass pasture on the rate of conception among ewes. J. Anim. Sci. 16, 703–10.CrossRefGoogle Scholar
Fels, H. E. & Neil, H. G. (1968). Effects on reproduction of prolonged grazing of oestrogenic pastures by owes. Aust. J. agric. Res. 19, 1059–68.CrossRefGoogle Scholar
George, J. M. & Turnbull, K. E. (1966). The effect of red clover pasture on the reproductive trait of ram lambs. Aust. J. Agric. Res. 17, 919–22.CrossRefGoogle Scholar
Lightfoot, R. J., Croker, K. P. & Neil, H. G. (1967). Failure of sperm transport in relation to ewe infertility following prolonged grazing on oestrogenic pastures. Aust. J. agric. Res. 18, 755–65.CrossRefGoogle Scholar
Morley, F. H. M., Axelsen, A. & Bennett, D. (1966). Recovery of normal fertility after grazing on oestrogenic red clover. Aust. vet. J. 42, 204–6.CrossRefGoogle ScholarPubMed
Newton, J. E. & Betts, J. E. (1968). Seasonal oestrogonic activity of various legumes. J. agric. Sci., Camb. 70, 77–82.CrossRefGoogle Scholar
Newton, J. E., Betts, J. E., Drane, H. M. & Saba, N. (1969). The oestrogenic activity of white clover. Occ. Symp. No. 6, Br. Grassld Soc. pp. 309–14.Google Scholar
Saba, N., Drane, H. M., Hebert, C. N., Newton, J. E. & Betts, J. E. (1972). Effect of disease on the oestrogenic activity and coumestrol content of white clover and lucerne. J. agric. Sci., Camb. 78, 471–6.CrossRefGoogle Scholar
Shutt, D. A., Weston, R. H. & Hogan, J. P. (1970). Quantitative aspects of phyto-oestrogen metabolism in sheep fed on subterranean clover (T. Subterraneum, Cult. Clare) or red clover (Trifolium pratense). Aust. J. agric. Res. 21, 713–22.CrossRefGoogle Scholar
Turnbull, K. E., Braden, A. W. H. & George, J. M. (1966). Fertilization and early embryonic losses in ewes that had grazed oestrogenic pastures for 6 years. Aust. J. agric. Res. 17, 907–17.CrossRefGoogle Scholar
Wong, E., Flux, D. S. & Latch, G. C. M. (1971). The oestrogenic activity of white clover (Trifolium repens L.) N.Z. Jl agric. Res. 14, 639–45.CrossRefGoogle Scholar