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Physiological studies of competition in Zea mays L: II. Effect of competition among maize plants

Published online by Cambridge University Press:  27 March 2009

Maurice Eddowes
Maurice Eddowes
Affiliation:
Harper Adams Agricultural College, Newport, Shropshire
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Summary

There was no measurable competition among plants before the four-leaf stage of growth. Competition among plants after the four-leaf stage reduced their average weight and their capacity to store assimilates in the ear after anthesis. As competition intensified total dry-matter yield at lower plant populations approached progressively the yield at the highest plant population. Total whole plant yield per unit area showed an asymptotic response to increase in plant population. Ear yield per unit area showed a parabolic response.

On a unit leaf area basis, the top three leaf laminae apparently contributed about 66% more to cob (rachis + grain) dry weight than the three adjacent leaf laminae immediately below them.

Ear weight per plant was reduced, either (a) by increasing plant population, or (b) by partial defoliation, or (c) by both treatments. In situation (c), i.e. where high plant populations were partially defoliated, cob weight per plant was apparently determined by the amount of available assimilates, and not by ear storage capacity.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 72 , Issue 2 , April 1969 , pp. 195 - 202
Copyright
Copyright © Cambridge University Press 1969

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References

REFERENCES

Allison, J. C. S. (1965). Physiological studies of the post-flowering period of Zea mays L. Ph.D. thesis, University of London.Google Scholar
Allison, J. C. S. & Watson, D. J. (1966). The production and distribution of dry matter in maize after flowering. Ann. Bot. N.S. 30, 365–83.CrossRefGoogle Scholar
Black, J. N. (1965). Competition within grass and cereal communities. In Growth of Cereals and drosses (ed. Milthorpe, F. L.). London: Butterworths.Google Scholar
Bleasdale, J. K. A. (1960). Studies on plant competition. In The Biology of Weeds,(ed. Harper, J. L.). Oxford: Blackwell.Google Scholar
Donald, C. M. (1963). Competition among crop and pasture plants. Adv. Agron. 15, 1–118.CrossRefGoogle Scholar
Duncan, W. G., Hatfield, A. L. & Ragland, J. L. (1965). The growth and yield of corn. II. Daily growth of corn kernels. Agron. J. 57, 221–2.CrossRefGoogle Scholar
Eddowes, M. (1961). Maize as a silage crop 1959–61. Tech. Bull. Harper Adams, agric. Coll. no. 7.Google Scholar
Eddowes, M. (1967). Physiological studies of competition in Zea mays L, Ph.D. thesis, University of Reading. Unpublished.Google Scholar
Eddowes, M. (1969). Physiological studies of competition in Zea mays L. I. Vegetative growth and ear development in maize. J. agric. Sci., Camb.Google Scholar
Friend, D. J. C. (1965). The effects of light and temperature on the growth of cereals. In Growth of Cereals and Grasses (ed. Milthorpe, F. L.). London: Butterworths.Google Scholar
Harper, J. L. (1964). The nature and consequence of interference among plants. Proc. XI Int. Congr. Genet. London: Pergamon Press.Google Scholar
Holliday, R. (1960). Plant population and crop yield. Fid Crop Abstr. 13, 1–14.Google Scholar
Kira, T., Ogawa, H. & Sazakaki, M. (1953). J. Inst. Polytech. Osaka. Univ. Ser. D 4, 1–16.Google Scholar
Lang, A. L., Pendleton, J. W. & Dungan, G. H. (1956). Influence of population and nitrogen levels on yield and protein and oil content of nine corn hybrids. Agron. J. 48, 284–9.CrossRefGoogle Scholar
Milthokpe, F. L. (1961). The nature and analysis of competition between plants of different species. Mechanisms in Biological competition. Symp. Soc. exp. Biol. 15,Google Scholar
Shinozaki, K. & Kira, T. (1956). J. Inst. Polytech. Osaka Univ. Ser. D. 7, 36.Google Scholar
Williams, W. A., Loomis, R. S. & Lepley, C. R. (1965) Vegetative growth of corn as affected by population density. I. Productivity in relation to interception of solar radiation. Crop. Sci. 5, 211–14.CrossRefGoogle Scholar