Soils of Floodplain Landscapes of the River Selenga Basin

IF 0.3 Q4 GEOGRAPHY Geography and Natural Resources Pub Date : 2023-12-01 DOI:10.1134/s1875372823050190
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Abstract

The factors of formation and patterns of spatial differentiation of soils within the floodplain landscapes of the River Selenga and its tributaries (on the territory of Mongolia and Russian Federation) depending on zonal–belt location are revealed. This factor has been established to significantly affect the genesis, structure, morphology, and properties of soils within river floodplains. Soil diversity is due to different types of synlithogenic trunk of the alluvial section and the trunk of primary soil formation of the department of underdeveloped soils. Soils of halomorphic section of the postlithogenic trunk are of a landscape significance in steppe and dry-steppe zones. Alluvial dark-humus soils are close to optimal in properties and regimes Alluvial humus–gley soils develop under excessive flood–ground moisture, the influence of the permafrost–thermal factor, and the low activity of soil microbiota. It is proposed to include the type of alluvial light-humus soils, which are quite widespread in the floodplain landscapes of the region, in the soil classification. These soils develop under conditions of sufficient heat supply, but severe moisture deficit and intensive mineralization of organic matter, and are characterized by low humus content. A comprehensive agrochemical assessment of the level of fertility of alluvial soils and hydromorphic solonchaks and the biological productivity of natural meadow communities is given.

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塞伦加河流域洪泛平原景观的土壤
摘要揭示了色楞格河及其支流(蒙古和俄罗斯联邦境内)洪泛区地貌中土壤的形成因素和空间分异模式,这取决于地带位置。这一因素已被证实对河流冲积平原内土壤的成因、结构、形态和特性有重大影响。土壤的多样性是由于冲积地段不同类型的同生主干和未开发土壤部门的原生土壤形成主干造成的。在草原和干旱草原区,后成土干系的卤代部分土壤具有重要的景观意义。冲积层深腐殖质土壤在性质和制度上接近最佳状态,冲积层腐殖质小麦土壤是在洪水地面湿度过大、永久冻土-热因素影响以及土壤微生物群活性较低的条件下形成的。建议将该地区洪泛平原地貌中广泛存在的冲积轻腐殖土类型纳入土壤分类。这些土壤是在热量充足、水分严重不足和有机物矿化密集的条件下形成的,腐殖质含量较低。本报告对冲积土和水成溶蚀土的肥力水平以及天然草地群落的生物生产力进行了全面的农业化学评估。
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来源期刊
CiteScore
0.50
自引率
0.00%
发文量
24
期刊介绍: Geography and Natural Resources  publishes information on research results in the field of geographical studies of nature, the economy, and the population. It provides ample coverage of the geographical aspects related to solving major economic problems, with special emphasis on regional nature management and environmental protection, geographical forecasting, integral regional research developments, modelling of natural processes, and on the advancement of mapping techniques. The journal publishes contributions on monitoring studies, geographical research abroad, as well as discussions on the theory of science.
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