Abstract
We investigated the optimal timing and quantity of K to reduce radiocesium in brown rice. The concentration of 137Cs in brown rice was reduced from 32 Bq kg−1 without K fertilizer to 2.0 Bq kg−1 with 16 g m−2 of basal K. The concentration of exchangeable 137Cs in the soil decreased from 234 to 25 Bq kg−1 with increasing application of K fertilizer from 0 to 57 g m−2. Hence, heavy application of K fertilizer in the early growing period can decrease the uptake of 137Cs by rice plants and the concentration of exchangeable 137Cs in the soil.
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Saito, T., Takahashi, K., Makino, T. et al. Effect of application timing of potassium fertilizer on root uptake of 137Cs in brown rice. J Radioanal Nucl Chem 303, 1585–1587 (2015). https://doi.org/10.1007/s10967-014-3609-9
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DOI: https://doi.org/10.1007/s10967-014-3609-9