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The growth and activity of winter wheat roots in the field: root growth of high-yielding crops in relation to shoot growth

Published online by Cambridge University Press:  27 March 2009

P. B. Barraclough
P. B. Barraclough
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ
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Summary

Root growth is considered in relation to shoot growth for high-yielding crops of winter wheat grown on three soil types in 1980 and 1981. From the time that nitrogen was applied to anthesis, shoot growth was rapid and effectively linear in relation to thermal time, whereas root growth entered a rapid linear phase after about 500–600 °C days, well before the application of nitrogen. Between double ridges and anthesis, shoots accumulated dry matter 10 times faster than roots on average. The relationship between root and shoot growth was different in the two years, which was probably due to reduced assimilate production in 1981 as a result of the dull, cloudy weather. At anthesis, average root: plant ratios for 1980 and 1981 were 0·132 and 0·093 respectively but no significant differences were caused by sowing dates or sites, despite the presence of a plough-pan on one of the soils.

Root:plant ratios declined from about 0·4 in winter and early spring to about 0·1 by anthesis. There was considerable variability in root:plant ratios for different crops during winter and early spring, caused in part by differences in soil-N availability and timing of application of fertilizer nitrogen.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 2 , October 1984 , pp. 439 - 442
Copyright
Copyright © Cambridge University Press 1984

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References

REFERENCES

Barraclough, P. B. & Leigh, R. A. (1984). The growth and activity of winter wheat roots in the field: the effect of sowing date and soil type on root growth of high-yielding crops. Journal of Agricultural Science, Cambridge 103, 59–74.CrossRefGoogle Scholar
Connor, D. J. (1975). Growth, water relations and yield of wheat. Australian Journal of Plant Physiology 2, 353–366.Google Scholar
Gallagher, J. N., Biscoe, P. V. & Wallace, J. S. (1979). Field studies of cereal leaf growth. IV. Winter wheat leaf extension in relation to temperature and leaf water status. Journal of Experimental Botany 30 (117), 657–668.CrossRefGoogle Scholar
Gregory, P. J., McGowan, M., Biscoe, P. V. & Hunter, B. (1978). Water relations of winter wheat. 1. Growth of the root system. Journal of Agricultural Science, Cambridge 91, 91–102.CrossRefGoogle Scholar
Nye, P. H. & Tinker, P. B. (1977). Solute Movement in the Soil-root System, p. 212. Oxford: Blackwell Scientific Publications.Google Scholar
Scott Russell, R. (1977). Plant Root Systems: Their Function and Interaction with the Soil, p. 20. London: McGraw-Hill.Google Scholar
Tinker, P. B. & Widdowson, F. V. (1982). Maximising Wheat Yields, and some Causes of Yield Variation. The Fertilizer Society of London.Google Scholar
Welbank, P. J., Gibb, M. J., Taylor, P. J. & Williams, E. D. (1974). Root growth of cereal crops. Rothamsted Experimental Station, Report for 1973, Part 2, pp. 26–66.Google Scholar