Potassium dynamics in the soil and yield formation in a long-term field experiment

H.W. Scherer, H.E. Goldbach and J. Clemens
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H.W. Scherer: Agricultural Faculty of the University of Bonn, Germany
H.E. Goldbach: Agricultural Faculty of the University of Bonn, Germany
J. Clemens: Agricultural Faculty of the University of Bonn, Germany

Plant, Soil and Environment, 2003, vol. 49, issue 12, 531-535

Abstract: The influence of an interrupted K fertilisation on different K fractions of the soil, yield formation and K uptake by different crops was investigated in a long-term field experiment on Luvisol derived from loess. Irrespective of the previous K fertilisation, the interruption of K fertilisation resulted in a sharp decline of CAL extractable K. K concentration in the saturation extract as well as HCl extractable K were reduced while K fixation capacity increased within 10 years after omitting K. Omitting K fertilisation decreased yields of sugar beet and potatoes while cereals were not affected, although K uptake of all crops reacted to the differentiated K supply to a different extent.

Keywords: potassium; fertilisation; availability; yield formation; potatoes; sugar beet; winter wheat (search for similar items in EconPapers)
Date: 2003
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:49:y:2003:i:12:id:4189-pse

DOI: 10.17221/4189-PSE

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