Brambilla M, Fortunati P, Carini F
Department of Agriculture and Environmental Chemistry, Faculty of Agricultural Sciences, Università Cattolica del Sacro Cuore, Piacenza, Italy.
J Environ Radioact. 2002;60(3):351-63. doi: 10.1016/s0265-931x(01)00109-6.
The results of an experimental study on the behaviour of 134Cs, 85Sr and 65Zn in processing tomato plants grown in peat substrate are presented. Plants were contaminated by wet deposition of 134Cs, 85Sr and 65Zn, either by sprinkling the above ground part at two phenological stages or by administering 134Cs, 85Sr and 65Zn to the soil. The plants contaminated at the second phenological stage intercepted 38.3% less than those contaminated at the first stage, although leaf area increased by more than double. Transfer coefficients from peat soil to ripe fruit for 134Cs are significantly higher than those for 85Sr and 65Zn. Leaf to fruit transfer coefficients for 134Cs are one order of magnitude higher than for 65Zn and two orders higher than for 85Sr. Only when deposition affects fruits, as at the second phenological stage, are transfer coefficients to fruits similar for the three radionuclides.
本文展示了一项关于¹³⁴Cs、⁸⁵Sr和⁶⁵Zn在泥炭基质中种植的加工番茄植株内行为的实验研究结果。通过在两个物候期对植株地上部分进行喷洒，或将¹³⁴Cs、⁸⁵Sr和⁶⁵Zn施用于土壤，使植株受到¹³⁴Cs、⁸⁵Sr和⁶⁵Zn的湿沉降污染。在第二个物候期受到污染的植株截留量比在第一个物候期受到污染的植株少38.3%，尽管叶面积增加了一倍多。¹³⁴Cs从泥炭土到成熟果实的转移系数显著高于⁸⁵Sr和⁶⁵Zn。¹³⁴Cs从叶到果实的转移系数比⁶⁵Zn高一个数量级，比⁸⁵Sr高两个数量级。只有当沉降影响果实时，如在第二个物候期，三种放射性核素向果实的转移系数才相似。
