茄子对干沉积^(90)Sr、^(137)Cs的截获和易位行为研究

Interception and Translocation of Dry Deposited^(90)Sr and^(137)Cs in Solanum Melongena L.

开展农作物对干沉积放射性气溶胶的截获和易位行为研究,对于公众辐射剂量估算以及旨在降低农产品放射性污染应对措施的有效性评估至关重要。选取我国代表性果菜类作物——茄子作为研究对象,在实验室开展了典型裂变产物^(90)Sr、^(137)Cs在茄子不同生长阶段的截获和易位行为研究。结果表明,试验植物对放射性核素的截获份额和易位因子随植株生长时间的延长而增大。开花期茄子对^(90)Sr、^(137)Cs的截获份额分别为0.14、0.21,结果期茄子对^(90)Sr、^(137)Cs的截获份额分别为0.17、0.26;开花期茄子对^(90)Sr、^(137)Cs的易位因子分别为1.6、4.7,结果期茄子对^(90)Sr、^(137)Cs的易位因子分别为2.3、5.9。就不同核素而言,不同生长阶段试验植物对^(137)Cs的截获份额和易位因子均高于^(90)Sr。

It is essential,a reliable assessment of the total dose or of the efficiency of countermeasures designed to level the residual contamination of agricultural products down,to improve the estimation of the fallout interception and retention by aerial parts of vegetation,and its further translocation.Eggplant,a representative fruit vegetable in China,was selected as the research object in this work.The interception and translocation behavior of typical fission products^(90)Sr and^(137)Cs in eggplant at diferent growth stages were studied in the laboratory.The results showed that the interception fractions and translocation factors of radionuclides increased with the extension of plant growth stage.The interception fractions of^(90)Sr and^(137)Cs at flowering stage was 0.14 and 0.21 respectively,and that at fruiting stage was 0.17 and 0.26 respectively;The translocation factors of o^(90)Sr and^(137)Cs at flowering stage was 1.6 and 4.7 respectively,and that of^(90)Sr and^(137)Cs at fruiting stage was 2.3 and 5.9 respectively.In terms of diferent nuclides,the interception fractions and translocation factors of^(137)Cs were higher than those of o Sr at different growth stages.