Vernadsky Institute of Geochemistry and Analytical Chemistry, GEOKHI RAS, Kosigin Street, 19, Moscow, Russia, 119991.
Laboratory of Soil Science, Faculty of Biology, Plant Biology, University of Barcelona, Barcelona, Spain.
Environ Geochem Health. 2020 Jan;42(1):159-171. doi: 10.1007/s10653-019-00323-5. Epub 2019 May 20.
This study was aimed at assessment of strontium and calcium mobility in soils and their accumulation with plants in the areas endemic for Kashin-Beck disease in Eastern Transbaikalia. The strontium and calcium mobility levels were determined using the method of sequential chemical extraction for 7 samples of meadow soils collected from the endemic region and 7 soil samples taken from conditionally control sites. To measure the Ca and Sr levels in the soil and plant samples, XRF analysis and AAS were used. The increased strontium level in the meadow soils of the endemic areas is accompanied by the element's higher mobility. The highest strontium yield was observed in the course of soil extraction using 1 M ammonium acetate, while the soils taken from the control sites gave lower amounts of the trace element. Furthermore, there is a positive correlation between the amount of the strontium extracted and its content in plants (r = + 0.86 - 0.98). At the sequential chemical extraction of calcium from the soils using the above method, the calcium yield was maximal in the ammonium acetate fraction (background sites) and in ammonium acetate and 6 M HCl fractions (endemic areas). The correlation between the amount of the calcium extracted in 1 M ammonium acetate and the macroelement levels found in plants was + 0.968. In addition, a peculiarly high accumulation of strontium in various willow species as compared to other meadow plants was revealed for the first time ever. Thus, the work introduces new data into the trace element biogeochemistry and environmental monitoring.
本研究旨在评估锶和钙在土壤中的迁移性及其在东西伯利亚外贝加尔卡山病流行地区植物中的积累。通过连续化学提取法，对从流行地区采集的 7 个草甸土壤样本和从条件对照区采集的 7 个土壤样本，测定了锶和钙的迁移水平。为了测量土壤和植物样本中的 Ca 和 Sr 含量，采用 XRF 分析和 AAS 进行了分析。流行地区草甸土壤中锶含量的增加伴随着元素更高的迁移性。在使用 1 M 乙酸铵提取土壤的过程中，观察到锶的最高产量，而对照区采集的土壤则产生较低量的微量元素。此外，提取的锶量与其在植物中的含量之间存在正相关关系（r=+0.86-0.98）。在使用上述方法从土壤中连续提取钙的过程中，在乙酸铵（背景区）和乙酸铵和 6 M HCl （流行区）部分中，钙的产量最大。在 1 M 乙酸铵中提取的钙量与植物中发现的常量元素水平之间存在 +0.968 的相关性。此外，首次发现柳树各物种对锶的积累明显高于其他草甸植物。因此，本工作为微量元素生物地球化学和环境监测提供了新的数据。
