Potato Research

, Volume 43, Issue 1, pp 9–18 | Cite as

Potassium uptake efficiency of potato and wheat in relation to growth in flowing solution culture

  • S. P. Trehan
  • N. Claassen
Full Papers


Uptake efficiency (in terms of shoot K content) of potato decreased with time compared to that of wheat at a deficient K level of 1.5 μM. This resulted from the decrease in root-shoot ratio with time for potato only. Both shoot and root growth rates of potato depended on solution K levels in the initial stages and were greater at higher K levels. At optimum K, uptake efficiency of potato increased with time and this was due to the increased K-influx with time. The K concentration of 4–5% in the potato shoot was sufficient to achieve 90% of maximum shoot growth rate. Plants grown at optimum K concentration attained shoot K content of 4–5% rapidly and achieved maximum shoot growth rate faster than those grown at low K concentration.

Additional keywords

K-influx ratio root-shoot 


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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • S. P. Trehan
    • 1
  • N. Claassen
    • 1
  1. 1.Institut für AgrikulturchemieGeorg-August-UniversitätGöttingenGermany

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