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Field studies on the growth and development of winter wheat

Published online by Cambridge University Press:  27 March 2009

J. S. McLaren
J. S. McLaren
Affiliation:
University of Nottingham, Department of Agriculture and Horticulture, School of Agriculture, Sutton Bonington, Loughborough, LE12 5RD
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Summary

The effects of variety, plant density and time of N application on the yield and yield components of winter wheat were investigated in factorial experiments during 1977–8 and 1978–9, at Sutton Bonington. Armada produced substantially fewer vegetative tillers/m2 but the number of ears/m2, from anthesis onwards, was similar to that of Maris Huntsman. The effects of the time of N application on tiller production and survival differed between the 2 years and may have been related to the amount of residual N in the soil. A linear relationship was found between the number of tillers/m2 which died and the maximum number of tillers/m2.

Kador produced a lower grain yield than Armada or Maris Huntsman, owing to a combination of lower ratio of grain D.M. to total above-ground D.M. (harvest index) and lower total dry-matter production. Armada produced a higher grain yield than Maris Huntsman in response to earlier application of N. Grain yield was less variable when final plant densities were greater than 200/m2.

Grain yield was not particularly well related to individual yield components but showed a good linear relationship with number of grains/m2. Grain yield was also linearly related to total dry-matter production, with treatment effects on harvest index being relatively small. The results indicate that factors which influenced crop growth during grain site development were relatively more important than the factors affecting subsequent grain filling.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 97 , Issue 3 , December 1981 , pp. 685 - 697
Copyright
Copyright © Cambridge University Press 1981

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