Effect of external potassium (K) supply on the uptake of ~137Cs by spring wheat (Triticum aestivum CV. Tonic): a large-scale hydroponic study

摘要

A large-scale hydroponic experiment was carried out n a non-controlled greenhouse. Spring wheat plants were grown to maturity at four levels of external K concentration (2, 4, 20 and 40 mg 1~-1) and one concentration of radiocaesium (8 Bq ml~-10. Concentrations of K and radiocaesium in the growth solution were closely monitored, and replenishments were made upon depletion. K effectively competed with radiocaesium in terms of root uptake.