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Density of Trifolium repens plants in mixed swards under intensive grazing by sheep

Published online by Cambridge University Press:  27 March 2009

M. J. M. Hay ,
J. L. Brock  and
V. J. Thomas
M. J. M. Hay
Affiliation:
Grasslands Division and Applied Mathematics Division, DSIR, Private Bag, Palmerston North, New Zealand
J. L. Brock
Affiliation:
Grasslands Division and Applied Mathematics Division, DSIR, Private Bag, Palmerston North, New Zealand
V. J. Thomas
Affiliation:
Grasslands Division and Applied Mathematics Division, DSIR, Private Bag, Palmerston North, New Zealand †Applied Mathematics Division, DSIR, Private Bag, Palmerston North, New Zealand
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Summary

Densities of physiologically independent plants of white clover were studied in New Zealand in pastures stocked at 22·5 ewes plus lambs/ha by set stocking, rotational grazing or a combination of both systems. Plants were sampled once a month for 1 year (1984/85) by taking turves and washing out the plants. Numbers of growing points and stolon dry weight per plant were obtained. At each sampling fifty, 50 mm diameter pasture plugs were taken from each sward and growing point density and stolon mass/m2 of white clover were measured. The density of white clover plants in the swards was estimated on the basis of both stolon dry weight and number of growing points.

The two estimates gave similar results. There was a trend of lowest densities in set-stocked pastures (334/m2), intermediate densities in combination management pastures (431/m2) and highest densities in the rotationally grazed pastures (553/m2). The overall mean density of white clover plants was 439/m2 and the range was 193–811/m2.

The structure of swards under the three systems of grazing differed and this was considered to contribute towards the variation in density of white clover plants in the various swards.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 113 , Issue 1 , August 1989 , pp. 81 - 86
Copyright
Copyright © Cambridge University Press 1989

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References

REFERENCES

Brereton, A. J., Carton, O. T. & Conway, A. (1985). The effect of grass tiller density on the performance of white clover. Proceedings of the 15th International Grassland Congress, Kyoto, pp. 756–757.Google Scholar
Briseno de la Hoz, V. M. & Wilman, D. (1981). Effects of cattle grazing, sheep grazing, cutting and sward height on a grass-white clover sward. Journal of Agricultural Science, Cambridge 97, 699–707.CrossRefGoogle Scholar
Brock, J. L., Hay, M. J. M., Thomas, V. J. & Sedcole, J. R. (1988). Morphology of white clover (Trifolium repens L.) plants in pastures under intensive sheep grazing. Journal of Agricultural Science, Cambridge 111, 273–283.CrossRefGoogle Scholar
Brougham, R. W. (1962). The leaf growth of Trifolium repens as influenced by seasonal changes in the light environment. Journal of Ecology 50, 449–459.CrossRefGoogle Scholar
Brougham, R. W., Ball, P. R. & Williams, W. M. (1978). The ecology and management of white clover-based pastures. In Plant Relations in Pastures (Ed. Wilson, J. R.), pp. 309–324. East Melbourne: CSIRO.Google Scholar
Carlson, G. E. (1966). Growth of white clover leaves after leaf removal. Proceedings of the 10th International Grassland Congress, pp. 134–136.Google Scholar
Chapman, D. F. (1987). Natural reseeding in Trifolium repens demography in grazed hill pastures. 2. Seedling appearance and survival. Journal of Applied Ecology 24, 1037–1043.CrossRefGoogle Scholar
Chapman, D. F. & Clark, D. A. (1984). Pasture responses to grazing management in hill country. Proceedings of the New Zealand Grassland Association 45, 168–176.CrossRefGoogle Scholar
Curll, M. L. (1982). The grass and clover content of pastures grazed by sheep. Herbage Abstracts 52, 403–411.Google Scholar
Davies, A. & Evans, M. E. (1982). The pattern of growth in swards of two contrasting varieties of white clover in winter and spring. Grass and Forage Science 37, 199–207.CrossRefGoogle Scholar
Frame, J. & Newbould, P. (1986). Agronomy of white clover. Advances in Agronomy 40, 1–88.CrossRefGoogle Scholar
Harberd, D. J. (1963). Observations on natural clones of Trifolium repens L. New Phytologist 62, 198–204.CrossRefGoogle Scholar
Harper, J. L. (1985). Modules, branches and the capture of resources. In Population Biology and Evolution of Clonal Organisms (Eds Jackson, J. B. C., Buss, L. W. & Cook, R. E.), pp. 1–33. New Haven: Yale University Press.Google Scholar
Hay, M. J. M. (1985). Seasonal variation in the vertical distribution of white clover (Trifolium repens L.) stolons in two contrasting pastures. Proceedings of the New Zealand Grassland Association 46, 195–198.CrossRefGoogle Scholar
Hay, M. J. M., Brock, J. L. & Fletcher, R. H. (1983). Effect of sheep grazing management on distribution of white clover stolons among 3 horizontal strata in ryegrass/white clover swards. New Zealand Journal of Experimental Agriculture 11, 215–218.CrossRefGoogle Scholar
Hay, M. J. M., Brock, J. L., Thomas, V. J. & Knighton, M. V. (1988). Seasonal and sheep grazing management effects on branching structure and dry weight of white clover plants in mixed swards. Proceedings of the New Zealand Grassland Association 49, 197–201.CrossRefGoogle Scholar
Hay, R. J. M. & Baxter, G. S. (1984). Spring management of pasture to increase summer white clover growth. Proceedings of the Lincoln College Farmers' Conference, pp. 132–137.Google Scholar
Haycock, R. (1984). Dry-matter distribution and seasonal yield changes in five contrasting genotypes of white clover. Journal of Agricultural Science, Cambridge 102, 333–340.CrossRefGoogle Scholar
Hoglund, J. H. & Brock, J. L. (1978). Regulation of nitrogen fixation in a grazed pasture. New Zealand Journal of Agricultural Research 21, 73–82.CrossRefGoogle Scholar
Horikawa, Y. (1986). Reproductive strategy in white clover (Trifolium repens L.) of different habitats. Journal of the Japanese Society of Grassland Science 32, 235–242.Google Scholar
Hutchings, M. J. & Bradbury, I. K. (1986). Ecological perspectives on clonal perennial herbs. BioScience 36, 178–182.CrossRefGoogle Scholar
Mitchell, K. J. & Glenday, A. C. (1958). The tiller population of pastures. New Zealand Journal of Agricultural Research 1, 305–313.Google Scholar
Schmid, B. & Harper, J. L. (1985). Clonal growth in grassland perennials. 1. Density and pattern-dependent competition between plants with different growth forms. Journal of Ecology 73, 793–808.CrossRefGoogle Scholar
Slade, A. J. & Hutchings, M. J. (1987). An analysis of the influence of clone size and stolon connections between ramets on the growth of Glechoma hederacea L. New Phytologist 106, 759–771.CrossRefGoogle ScholarPubMed
Snaydon, R. W. (1985). Aspects of the ecological genetics of pasture species. In Structure and Functioning of Plant Populations (Eds Haeck, J. & Woldendorp, J. W.), pp. 127–152. Amsterdam: North Holland.Google Scholar
Suckling, F. E. T. (1959). Pasture management trials on unploughable hill country at Te Awa. 2. Results for 1951–57. New Zealand Journal of Agricultural Research 2, 488–543.CrossRefGoogle Scholar
Trathan, P. (1983). Clonal interactions of Trifolium repens andLolium perenne. PhD thesis, University of Wales.Google Scholar
Turkington, R., Cahn, M. A., Vardy, A. & Harper, J. L. (1979). The growth, distribution and neighbour relationships of Trifolium repens in a permanent pasture. Journal of Ecology 67, 231–243.CrossRefGoogle Scholar
Wilman, D. & Asiegbu, J. E. (1982). The effects of variety, cutting interval and nitrogen application on the morphology and development of stolons and leaves of white clover. Grass and Forage Science 37, 15–27.CrossRefGoogle Scholar