Abstract

The ²²⁶Ra, ²³²Th, and ⁴⁰K vertical profiles were studied in relation to the following soil properties: pH_H2O, the sum of exchangeable Ca²⁺ and Mg²⁺, the saturation with bases, and the content of humus and mobile forms of phosphorus and potassium. An increase in the specific activity of ²²⁶Ra, ²³²Th, and ⁴⁰K as a result of humus accumulation and the biogenic accumulation of mobile forms of potassium and phosphorus was detected in the 0- to 10-cm layer of the A horizon in the soil under an oak forest. The removal of ²²⁶Ra from the middle part of the profile of dark gray forest deep-carbonate soil was recorded. A positive correlation between the specific activity of ²²⁶Ra and the total exchangeable bases of Ca²⁺ and Mg²⁺ in the A, A(AE), AB, and deeper (B1, B2, and B3) horizons was revealed. This indicates the interrelated behavior of these elements-analogues. The removal of ²³²Th from the A(AE) horizon and its accumulation in the AB horizon under conditions of local podzolization of dark gray forest soil in a birch forest was observed.

中文翻译：

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碳酸盐岩层深不同的深灰色森林土壤中226 Ra，232 Th和40 K的分布

摘要

研究了²²⁶ Ra，²³² Th和⁴⁰ K的垂直剖面，涉及以下土壤特性：pH _H2O，可交换的Ca ²⁺和Mg ²⁺的总和，碱的饱和度以及腐殖质和移动形式的含量磷和钾。由于腐殖质的积累和钾和磷的流动形式的生物积累，在该区域A层的0至10 cm层中检测到了²²⁶ Ra，²³² Th和⁴⁰ K的比活增加。橡树林下的土壤。去除²²⁶从深灰色森林深层碳酸盐土壤剖面的中间部分记录了Ra。揭示了²²⁶ Ra的比活度与A，A（AE），AB和更深的（B1，B2和B3）层中Ca ²⁺和Mg ²⁺的总可交换碱基之间呈正相关。这表明这些元素类似物的相互关联的行为。观察到白桦林中深灰色森林土壤局部过地化条件下，从A（AE）层中去除了²³² Th，并在AB层中积累。