Water logging may inhibit plant growth primarily by nutrient deficiency rather than nutrient toxicity
Steffens, D.(Justus Liebig Univ., Giessen (Germany))E-mail:diedrich.steffens@ernaehrung.uni-giessen.de | Huetsch, B.W.(Justus Liebig Univ., Giessen (Germany)) | Eschholz, T.(Justus Liebig Univ., Giessen (Germany)) | Losak, T.(Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic)) | Schubert, S.(Justus Liebig Univ., Giessen (Germany))
The objective of this study was to analyse whether waterlogging and oxygen deficiency inhibit the growth of spring barley and spring wheat by a deficiency or by a toxicity of nutrients. Top soil and subsoil differing largely in various characteristics revealed a growth inhibition of wheat and barley. In the case of subsoil, plant growth was inhibited because of waterlogging, without Fe or Mn toxicity. Experimetns in anaerobic (N2) and aerobic conditions confirmed that oxygen deficiency did not induce nutrient toxicity (Fe, Mn). When cultivating half of the barley root system in varying combinations of aerobic/anaerobic conditions and with/without K supply in a split-root water culture experiment, sufficient K uptake occurred only when K and oxygen were applied in the same root compartment. Nutrient deficiency rather than toxicity appears to be the major cause of poor plant growth in waterlogged soils.
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