Geochemical Features of Organo-Accumulative Soils of Subtaiga and Subtaiga–Forest-Steppe Light Coniferous Forests of Northern Mongolia

IF 1.4 4区 农林科学 Q4 SOIL SCIENCE Eurasian Soil Science Pub Date : 2024-04-16 DOI:10.1134/s1064229323603116
Yu. N. Krasnoshchekov
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Abstract

We have studied geochemical features of organo-accumulative soils (Eutric Regosols (Loamic, Ochric)), Cambic Someric Phaeozems (Loamic)) widely spread in the soil cover of subtaiga and subtaiga-forest-steppe light coniferous forests and forming the lower boundary of the forest zone in the mountains of Northern Mongolia. Data on the microelement composition of soil-forming rocks are given; the paragenetic association of trace elements in them is composed of Pb, Cu, Zn, Co, V, Cr, Ni, Mn, Mo, Ba, Sr, Zr, and B. The residual and redeposited weathering crusts of igneous rocks are enriched with Zn, Cr, Mo, and B as compared to the mean content of these elements in the lithosphere, but they contain less Pb, Co, Mn, Ba, Sr, and Zr. The residual and re-deposited weathering crusts of calcareous rocks are enriched in Pb, Cu, Zn, V, Cr, Sr, and B, and are impoverished in Co, Ni, Mn, Mo, Ba, and Zr. The morphological, physicochemical and chemical properties of soils, as well as the content and radial distribution of trace elements in soils are discussed. The data obtained testify to the accumulation of most trace elements in the surface organic and humus-accumulative soil horizons. This is associated with the heterogeneity of soil-forming rocks and with the effect of soil processes, which cause the accumulative redistribution of elements and their deposition at organic-sorption and carbonate geochemical barriers. It is shown that the studied soils differ not only in the absolute contents of trace elements, participating in the biological cycle, but also in the intensity of their involvement in biogenic migration.

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蒙古北部 Subtaiga 和 Subtaiga-Forest-Steppe 轻针叶林有机累积土壤的地球化学特征
摘要 我们研究了广泛分布在亚台加和亚台加-森林-草原轻针叶林土壤覆盖层中、构成蒙古北部山区森林地带下边界的有机质累积土壤(Eutric Regosols(Loamic,Ochric))、Cambic Someric Phaeozems(Loamic))的地球化学特征。火成岩的残留和再沉积风化壳与岩石圈中这些元素的平均含量相比,富含锌、铬、钼和硼,但铅、钴、锰、钡、锶和锆的含量较少。钙质岩石的残余和再沉积风化壳富含铅、铜、锌、钒、铬、锶和硼,而钴、镍、锰、钼、钡和锆的含量较低。本文讨论了土壤的形态、物理化学和化学特性,以及土壤中微量元素的含量和径向分布。所获得的数据证明,大多数微量元素都积聚在表层有机质和腐殖质积累的土壤层中。这与成土岩石的异质性和土壤过程的影响有关,土壤过程导致元素的累积性再分布以及元素在有机吸附和碳酸盐地球化学屏障处的沉积。研究表明,所研究的土壤不仅在参与生物循环的微量元素绝对含量方面存在差异,而且在参与生物迁移的强度方面也存在差异。
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来源期刊
Eurasian Soil Science
Eurasian Soil Science 农林科学-土壤科学
CiteScore
2.70
自引率
35.70%
发文量
137
审稿时长
12-24 weeks
期刊介绍: Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.
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