Abstract
The root uptake by wheat of three activation products (57Co, 54Mn and 65Zn) was studied in a 3-year field experiment. The aim of the investigation was to calculate the soil–plant transfer factors of these nuclides and to verify the role played by different soil treatments (Ca and K) on the uptake. The uptake of 54Mn and 65Zn, relevant for the plant, was higher than that of 57Co (physiologically unimportant). The temporal distribution of the uptake showed a decreasing trend, while the treatments containing Ca led to lower transfer factors for 54Mn and 65Zn, which varied between 0.67 and 3.68. The variations exhibited by the different nuclides were discussed, as well as the differences between the treatments.
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