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Start Over Descriptor "K release" Publisher kluwer academic publishers
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4. Release of non exchangeable potassium from different size fractions of two highly K-fertilized soils in the rhizosphere of rape (Brassica napus cv Drakkar)

Author

UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire, Dufey, Joseph, Niebes, Jean-François, Jaillard, Benoit, Hinsinger, Philippe, UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire, Dufey, Joseph, Niebes, Jean-François, Jaillard, Benoit, and Hinsinger, Philippe

Abstract

The release of nonexchangeable potassium by the different particle size fractions of two soils was studied with a culture device designed to confine soil samples in the rhizosphere of rape (Brassica napus cv Drakkar). After 8 days of cropping, the contribution of nonexchangeable K to K uptake ranged from 50% in the fine clay to 80-100% in the coarser fractions. Due to their high supplying power and their relative abundance, the silt fractions provided a major part of the supply of K by these soils.

Published
1993

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