Modelling potassium uptake by wheat (Triticum aestivum) crops |
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| Authors: | P Seward P B Barraclough P J Gregory |
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| Institution: | (1) Biochemistry and Physiology Department, AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, AL5 2JQ Harpenden, Herts., UK;(2) Department of Soil Science, University of Reading, London Road, Reading, UK |
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| Abstract: | Spring wheat was grown in the field under deficient and sufficient levels of soil K and with high and low supplies of fertiliser nitrogen. Measurements were made of K uptake, soil nutrient supply parameters, root growth and, in solution culture, root influx parameters. Mechanistic models predicted uptake reasonably well under K-deficient conditions, but over-predicted uptake, by as much as 4 times, under K-sufficient conditions. The over-prediction was apparently due to poor characterisation of plant demand. |
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| Keywords: | models potassium uptake Triticum aestivum L wheat |
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