Abstract

For the first time, a detailed diagnostics and classification of soils of the Suntar-Khayata Range have been performed. This study is a continuation of long-term soil research in the Verkhoyansk mountainous soil province. The morphogenetic properties of soils in different altitudinal zones of the Suntar-Khayata Range are described, and the position of these soils in the new Russian soil classification system is determined. The Suntar-Khayata Range (63° N; 139° E) is found near the Pole of Cold of the northern hemisphere and is characterized by the distinct altitudinal zonation. In the study area, parent materials are represented by sandstone and, less often, by siltstone. In the warm season, the upper boundary of permafrost can be clearly traced only in the profiles of low-stony soils on the floodplains. The vertical zonality in the studied area includes the following zones: the valley zone (<900 m a.s.l.) with alluvial soils (Skeletic Fluvisols), the mountainous taiga zone (900–1300 m a.s.l.) with a predominance of podburs (Skeletic Spodic Cryosols), and the subalpine shrub (1300–1500 m a.s.l.) and mountainous tundra (>1500 m a.s.l.) with a predominance of lithozems (Leptosols). All the soils are relatively shallow, stony, and coarse-textured; their organic horizons are thin, and raw-humus (AO) horizons tend to predominate. Gley features are absent in the soil profiles. The soils have an acid or a slightly acid reaction, low base saturation (except for alluvial soils), and signs of organic matter illuviation. The results of this study can be used to expand the database on soils of poorly studied cold continental mountain regions of Eurasia.

中文翻译：

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Suntar-Khayata山脊垂直区的土壤：形态，性质和分类

摘要

首次进行了Suntar-Khayata山脉土壤的详细诊断和分类。这项研究是Verkhoyansk山区土壤省份长期土壤研究的延续。描述了Suntar-Khayata山脉不同海拔区域的土壤形态学特性，并确定了这些土壤在新的俄罗斯土壤分类系统中的位置。Suntar-Khayata山脉（北纬63°；东经139°）位于北半球的寒冷极附近，其特征是明显的纵向带状分布。在研究区域中，母体材料以砂岩为代表，而较少见的是粉砂岩。在温暖的季节，永久冻土的上边界只能在洪泛平原上低密度土壤的剖面中清晰地描绘出来。研究区域的垂直地带性包括以下区域：冲积土（Skeletic Fluvisols）的谷地带（<900 m asl），主要有荚果（Skeletic Spodic Cryosols）的山地针叶林带（900-1300 m asl） ，以及亚高山灌木（1300-1500 m asl）和山区苔原（> 1500 m asl），其中主要是锂类（Leptosols）。所有的土壤都是相对较浅，石质和粗糙的土壤。它们的有机层很薄，原始腐殖质（AO）层往往占主导地位。土壤剖面中不存在格利特征。土壤会发生酸或微酸反应，碱饱和度低（冲积土除外），并有有机物污染的迹象。这项研究的结果可用于扩展对欧亚大陆寒区寒冷山区的土壤研究不足的数据库。