Plant Soil Environ., 2003, 49(12):531-535 | DOI: 10.17221/4189-PSE

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

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

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

Published: December 31, 2003  Show citation

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Scherer HW, Goldbach HE, Clemens J. Potassium dynamics in the soil and yield formation in a long-term field experiment. Plant Soil Environ. 2003;49(12):531-535. doi: 10.17221/4189-PSE.
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