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Nutrient relations of winter wheat: 1. Accumulation and distribution of Na, K, Ca, Mg, P, S and N

Published online by Cambridge University Press:  27 March 2009

P. J. Gregory ,
D. V. Crawford  and
M. McGowan
P. J. Gregory
Affiliation:
University of NottinghamSchool of Agriculture, Sutton Bonington, Loughboroitgh, Leica
D. V. Crawford
Affiliation:
University of NottinghamSchool of Agriculture, Sutton Bonington, Loughboroitgh, Leica
M. McGowan
Affiliation:
University of NottinghamSchool of Agriculture, Sutton Bonington, Loughboroitgh, Leica
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Summary

Maris Huntsman winter wheat was sown on 30 October 1974 and grown under typical farming conditions. Between sowing and harvest (5 August 1975), the crop was sampled on 23 occasions and dried samples of individual plant components were analysed for Na, K, Ca, Mg, P, S and N composition.

The concentration of nutrients within the whole plant generally decreased throughout growth but different parts of the plant varied in their behaviour. Uptake of all nutrients ceased at, or shortly after, anthesis in mid-June while dry-matter accumulation continued slowly for a further 2–3 weeks and almost stopped 4 weeks before harvest. The major period of nutrient uptake occurred between mid-April and mid June coincident with the period of rapid shoot growth. Large amounts of potassium and sulphur (almost 50% of the plant's anthesis content) and lesser amounts of calcium (15%) were lost from the plant after anthesis and efflux from the roots into the soil appeared to be the most likely pathway of removal.

Accumulation of nutrients in the ear occurred throughout grain-filling by translocation from other parts of the plant, particularly the leaves and stems: the effects of this redistribution on the production of dry matter after anthesis are discussed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 93 , Issue 2 , October 1979 , pp. 485 - 494
Copyright
Copyright © Cambridge University Press 1979

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