Swedish University of Agricultural Sciences, Department of Soil and Environment, P.O. Box 7014, SE-75007 Uppsala, Sweden.
Environ Pollut. 2013 Nov;182:335-42. doi: 10.1016/j.envpol.2013.07.035. Epub 2013 Aug 23.
The accumulation of (134)Cs and (85)Sr within different parts of spring oilseed rape and spring wheat plants was investigated, with a particular focus on transfer to seeds after artificial wet deposition at different growth stages during a two-year field trial. In general, the accumulation of radionuclides in plant parts increased when deposition was closer to harvest. The seed of spring oilseed rape had lower concentrations of (85)Sr than spring wheat grain. The plants accumulated more (134)Cs than (85)Sr. We conclude that radionuclides can be transferred into human food chain at all growing stages, especially at the later stages. The variation in transfer factors during the investigation, and in comparison to previous results, implies the estimation of the risk for possible transfer of radionuclides to seeds in the event of future fallout during a growing season is still subject to considerable uncertainty.
研究了（134）Cs 和（85）Sr 在春油菜和春小麦植株不同部位的积累情况，特别关注在两年田间试验中不同生长阶段人工湿沉降后向种子的转移。一般来说，放射性核素在接近收获期时在植物各部位的积累量增加。春油菜种子中的（85）Sr 浓度低于春小麦籽粒。植物积累的（134）Cs 比（85）Sr 多。我们得出结论，放射性核素可以在所有生长阶段，特别是在后期，转移到人类食物链中。在调查过程中，转移因子的变化与以前的结果相比，意味着在生长季节发生未来沉降事件时，对放射性核素向种子转移的风险进行估计仍然存在相当大的不确定性。
