Abstract

Landscapes of the northern part of the Bolshoi Paipudynskii Ridge (the Polar Urals) served as a key site to study the taxonomic diversity of soils on calcareous rocks as related to both bioclimatic and geogenic (relief, thickness of eluvial and colluvial derivatives of calcareous rocks) factors. Soils of the postlithogenic trunk of the new Russian soil classification system are developed under different plant communities. They are classified within several soil orders: cryometamorphic soils (Mollic Calcaric Stagnosols), lithozems (Folic Mollic Calcaric Leptosols), organo-accumulative soils (Molic Leptic Calcaric Stagnosols), and gley soils (Folic Calcaric Gleysols). These soils compose either small individual areas, or occur in soil associations. The mass of carbon and nitrogen in the aboveground phytomass ranges within 40–49 and 0.9–2.3%, respectively. The storage of aboveground phytomass (fresh weight) varies from 20 to 1600 g/m². In each soil profile, the surface horizons have a maximum content of organic carbon and nitrogen (up to 40 and 2.5%, respectively). The C_org and N_org patterns in soils depend on the productivity of plant communities, the composition of falloff, and the conditions for its decomposition. In all soil profiles, the inorganic carbon content (C_inorg) increases down the soil profile reaching 12%. The mineral nitrogen content does not exceed 1%. The contents of N-\({\text{NH}}_{4}^{ + }\) and N-\({\text{NO}}_{3}^{ - }\) have their maximums reaching 140 and 30 mg/kg, respectively, in the surface soil horizons.

中文翻译：

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极地乌拉尔钙质岩上丘陵苔原景观的土壤和土壤覆盖：多样性，分类学以及氮碳模式

摘要

Bolshoi Paipudynskii山脊北部（极地乌拉尔山脉）的景观是研究生物气候和地质成因（石灰石的斜坡，坡积和坡积衍生物的厚度）与生物气候和地质相关的土壤生物分类多样性的重要场所。因素。新的俄罗斯土壤分类系统的后生石树干的土壤是在不同的植物群落下开发的。它们分为以下几种土壤类别：低温变质土壤（摩尔钙碳质碎屑溶胶），锂化菌素（叶酸钙钙质碎屑溶胶），有机蓄积性土壤（Molic Leptic钙质碎屑溶胶）和g利土壤（叶酸钙质碎屑溶胶）。这些土壤组成小的个体区域，或以土壤组合形式存在。地上植物中的碳和氮质量在40-49％和0.9-2.3％之间，分别。地上植物的存储量（鲜重）从20到1600 g / m不等²。在每种土壤剖面中，表层的有机碳和氮含量最高（分别高达40％和2.5％）。土壤中的C _org和N _org模式取决于植物群落的生产力，径流的组成及其分解的条件。在所有土壤剖面中，无机碳含量（C _inorg）随土壤剖面下降而增加，达到12％。矿物质氮含量不超过1％。N- \（{\ text {NH}} _ {4} ^ {+} \）和N- \（{\ text {NO}} _ {3} ^ {-} \）的内容达到最大值在表层土壤中的水平分别为140和30 mg / kg。