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An investigation of the usefulness of phosphorus concentrations in tissue water as indicators of the phosphorus status of field-grown spring barley

Published online by Cambridge University Press:  27 March 2009

R. A. Leigh  and
A. E. Johnston
R. A. Leigh
Affiliation:
Rothamsted Experimental Station, Harpenden, Herfordshire, AL5 2JQ
A. E. Johnston
Affiliation:
Rothamsted Experimental Station, Harpenden, Herfordshire, AL5 2JQ
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Summary

The effects of recalculating P concentrations in spring barley (Hordeum vulgare L. cv. Georgie or Julia) on the basis of tissue water were investigated. Expressing P concentrations in this way altered their apparent behaviour with time. Whereas % P in dry matter declined during growth, P concentrations in tissue water decreased initially but then increased. The rate of increase became more rapid during senescence. Nitrogen and water supplies induced differences in % P in dry matter but these were reduced when P concentrations were expressed on the basis of tissue water. Like % P in dry matter, P concentrations in tissue water were lower in crops grown on a soil that had not received P since 1852. It is suggested that P concentrations in tissue water can provide a method for assessing crop P status that has some advantages over % P in dry matter.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 107 , Issue 2 , October 1986 , pp. 329 - 333
Copyright
Copyright © Cambridge University Press 1986

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