We conducted a field experiment in soybean with different levels of K application to elucidate the comparative dynamics of ¹³⁷Cs and K. The inventory of K in the shoots increased substantially from the fifth trifoliate stage to the full seed stage, and as the absorption of K increased, so too did the absorption of ¹³⁷Cs. Overall, the effect of K application was much greater in terms of ¹³⁷Cs dynamics than K dynamics or biomass production. K application reduced not only the accumulation of ¹³⁷Cs in the shoots, but also the distribution of ¹³⁷Cs to the grains. However, the decrease of ¹³⁷Cs distribution to the grain had a much smaller effect on ¹³⁷Cs accumulation in the grains than ¹³⁷Cs absorption. A positive correlation was also observed between the exchangeable ¹³⁷Cs/K ratio in the soil and the ¹³⁷Cs/K ratio in the shoots for each growth stage, and the ¹³⁷Cs/K ratios in the shoots at the full seed and full maturity stage were much higher than those at the fifth trifoliate and full bloom stage under the same exchangeable ¹³⁷Cs/K ratio in the soil. These findings suggest a decrease in the discrimination of ¹³⁷Cs from K during absorption after the full bloom stage. As a result of this and the increase in soil-exchangeable ¹³⁷Cs/K with growth, radiocesium was more transferable to the shoots after the full bloom stage. Overall, these results suggest that lowering the soil-exchangeable radiocesium/potassium ratio after the full bloom stage by increasing K availability could efficiently reduce the transfer of radiocesium to the grains.

我们在不同钾肥水平的大豆上进行了田间试验，以阐明¹³⁷ Cs和K的比较动态。从第五叶期到完整种子期，以及随着K的吸收，芽中K的库存量显着增加。增加了，因此¹³⁷ Cs的吸收也增加了。总体而言，就¹³⁷ Cs动力学而言，钾肥施用的影响要远大于钾肥动力学或生物质生产。施钾不仅减少了芽中¹³⁷ Cs的积累，而且减少了¹³⁷ Cs在籽粒中的分布。然而，减少¹³⁷ Cs的分布于晶曾在一个更小的效果¹³⁷Cs在谷物中的积累比¹³⁷ Cs的吸收大。可交换之间也观察到的正相关¹³⁷在土壤铯/ K比和¹³⁷在枝条每个生长阶段铯/ K比和¹³⁷在饱满的种子在枝条铯/ K比和完全成熟阶段在相同的可交换¹³⁷ Cs / K比下，土壤中的三叶草含量远高于第五叶期和盛开期。这些发现表明，在盛花期后的吸收过程中，对¹³⁷ Cs与K的区分度降低了。结果，土壤交换量增加¹³⁷Cs / K随着生长，在盛花期之后，放射性铯更容易转移到枝条上。总体而言，这些结果表明，在盛花期之后，通过增加钾的有效性来降低土壤可交换的radio /钾比，可以有效地减少of向谷物的转移。