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Ryegrass populations from intensively managed leys III. Reaction to management, nitrogen application and Poa trivialisL. in field trials

Published online by Cambridge University Press:  27 March 2009

A. H. Charles
A. H. Charles
Affiliation:
Welsh Plant Breeding Station, Aberystwyth
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Summary

Populations of Lolium perenneL. derived from fields where the management was paddock grazing were compared with plants from breeder's seed of the cultivars originally sown at the collection sites. In the first trial the ‘survivor’ population derived from an S. 24 ley was better adapted to withstand intensive sheep grazing and high nitrogen application (672 kg/ha/ annum) than either S. 24 or Stormont Zephyr. Extra treading by sheep in addition to that involved in the high stock density (1186sheep/ha) used at the time of grazing produced only a small reduction in yield of dry matter. In the second trial, the ‘survivor’ population derived from an S. 23 ley had a higher yield of dry matter than S. 23 at the high level of N application (672 kg/ha/annum). There was no difference in the yields when 168 kg N/ha/annum was applied. In both field trials yield in the year of sowing was high for all swards, although the survivor populations were slower to establish than the original cultivars. The evaluation of the ryegrass populations in terms of dry-matter yield was affected by the small quantity of Poa trivialispresent when this grass was sown with the ryegrasses. In the second trial this conclusion also applied to yield of nitrogen in the herbage.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 79 , Issue 2 , October 1972 , pp. 205 - 215
Copyright
Copyright © Cambridge University Press 1972

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References

Campbell, A. G. (1966). Effect of treading by dairy cows on pasture production and botanical structure, on Te Kowhai soil. N.Z. Jl agric. Res. 9, 1009–24.CrossRefGoogle Scholar
Chablbs, A. H. (1961). Herbage production in Great Britain from leys in the year of sowing. Herb. Abstr. 31, 1–6.Google Scholar
Charles, A. H. (1964). Differential survival of plant types in swards. J. Br. Grassld Soc. 19, 198–204.CrossRefGoogle Scholar
Charles, A. H. (1966). Variation in grass and clover populations in response to agronomic selection pressures. Proc. X. Int. Grassld Congr. Helsinki 625–29.Google Scholar
Charles, A. H. (1970). Ryegrass populations from intensively managed leys. I. Seedling and spaced plant characters. J. agric. Sci., Camb. 75, 103–107.CrossRefGoogle Scholar
Chables, A. H. (1971). Ryegrass populations from intensively managed leys. II. Reaction to nitrogen and Poa trivialisL. J. agric Sci., Camb. 76, 233—41.Google Scholar
Edmond, D. B. (1958). The influence of treading on pasture, a preliminary study. N.Z. Jl agric. Res. 1, 319–28.Google Scholar
Edmond, D. B. (1964). Some effects of sheep treading on the growth of ten pasture species. N.Z. Jl agric. Res. 7, 1–16.CrossRefGoogle Scholar
Edmond, D. B. (1970). Effects of treading on pastures, using different animals and soils. Proc. XI Int. Grassld Congr. 604–607.Google Scholar
Haggar, R. J. (1971). The significance and control of Poa Irivialisin ryegrass pastures. J. Br. Grassld Soc. 26, 117–21.CrossRefGoogle Scholar
Jones, M. (1933). Grassland management and its influence on the sward. J. R. agric. Soc. Eng 94, 21–41.Google Scholar
Ministry Op Agriculture, Fisheries and Food. (1970). Modern farming and the soil, pp. 118. Report of the Agricultural Advisory Council on soil structure and soil fertility. London: H.M.S.O.Google Scholar
Suckling, F. E. T. (1960). Productivity of pasture species on hill country. N.Z. Jl agric. Res. 3, 579–91.CrossRefGoogle Scholar