Modelling potassium uptake by wheat (Triticum aestivum) crops

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 u...

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Bibliographic Details
Published in:Plant and soil 1990-06, Vol.124 (2), p.303-307
Main Authors: Seward, P. (Institute of Arable Crops Research AFRC, Harpenden, Herts. (UK). Dept. of Biochemistry and Physiology), Barraclough, P.B, Gregory, P.J
Format: Article
Language:English
Subjects:
ABSORCION DE SUBSTANCIAS NUTRITIVAS
ABSORPTION DE SUBSTANCES NUTRITIVES
Absorption. Translocation of ions and substances. Permeability
Agricultural soils
Agrology
Agronomy. Soil science and plant productions
Biological and medical sciences
Economic plant physiology
Fundamental and applied biological sciences. Psychology
Metabolism
Metabolism. Physicochemical requirements
MODELE
Modeling
MODELOS
NUTRIENT UPTAKE
Nutrition. Photosynthesis. Respiration. Metabolism
Plant physiology and development
Plant roots
Plants
POTASIO
POTASSIUM
Root growth
Supply
TRITICUM AESTIVUM
Wheat
Wheat soils
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Summary: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.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF00009277