Microdiagnostics of initial pedogenesis on a phosphogypsum dump

IF 2 Q3 SOIL SCIENCE

Spanish Journal of Soil Science Pub Date : 2018-07-13 DOI:10.3232/SJSS.2018.V8.N2.04

V. P. Belobrov, M. Lebedeva, K. Abrosimov, A. Grebennikov, E. Torochkov, A. I. Ryashko

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引用次数: 1

Abstract

This paper presents the results of the study of initial pedogenesis on phosphogypsum dump rocks under dry steppe bioclimatic conditions (Balakovo, Saratov Region, Russia). It was shown that a soil crust about 3 cm thick was formed at the dump surface as a result of natural pedogenic processes over a period of 20-30 years. Such soil crusts act to cement the surface and protect the dump material from deflation and water erosion. The crust was shown to consist of two parts that can be distinguished by morphological features: an upper part (about 2 cm thick) of a more firmly bound material more grey in colour and a lower part (about 1 cm thick) with a looser consistency and lighter colour. The structural organisation is primarily determined by the presence of live roots of grasses and mosses, which is characteristic of a biogenic crust. The two parts of the crust were characterized at both macro- and micro-scales, by use of thin sections and tomographic imagery. The presence of humification features and porosity observed within the crust allowed for the diagnostics of initial pedogenesis.

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磷石膏堆初始成土作用的显微诊断

本文介绍了在干燥草原生物气候条件下（俄罗斯萨拉托夫地区巴拉科沃）磷石膏堆石的初始成土研究结果。研究表明，经过20-30年的自然成土过程，在垃圾场表面形成了约3厘米厚的地壳。这种土壤结皮起到水泥表面的作用，并保护倾倒材料免受通货紧缩和水侵蚀。地壳由两部分组成，可以通过形态特征来区分：上部（约2厘米厚）是一种结合更牢固的材料，颜色更灰，下部（约1厘米厚）稠度更松，颜色更浅。结构组织主要由草和苔藓的活根的存在决定，这是生物地壳的特征。通过薄片和断层图像，在宏观和微观尺度上对地壳的两个部分进行了表征。在地壳内观察到的腐殖化特征和孔隙度的存在，有助于诊断最初的成土作用。

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来源期刊

Spanish Journal of Soil Science SOIL SCIENCE-

CiteScore

2.20

自引率

0.00%

发文量

期刊介绍： The Spanish Journal of Soil Science (SJSS) is a peer-reviewed journal with open access for the publication of Soil Science research, which is published every four months. This publication welcomes works from all parts of the world and different geographic areas. It aims to publish original, innovative, and high-quality scientific papers related to field and laboratory research on all basic and applied aspects of Soil Science. The journal is also interested in interdisciplinary studies linked to soil research, short communications presenting new findings and applications, and invited state of art reviews. The journal focuses on all the different areas of Soil Science represented by the Spanish Society of Soil Science: soil genesis, morphology and micromorphology, physics, chemistry, biology, mineralogy, biochemistry and its functions, classification, survey, and soil information systems; soil fertility and plant nutrition, hydrology and geomorphology; soil evaluation and land use planning; soil protection and conservation; soil degradation and remediation; soil quality; soil-plant relationships; soils and land use change; sustainability of ecosystems; soils and environmental quality; methods of soil analysis; pedometrics; new techniques and soil education. Other fields with growing interest include: digital soil mapping, soil nanotechnology, the modelling of biological and biochemical processes, mechanisms and processes responsible for the mobilization and immobilization of nutrients, organic matter stabilization, biogeochemical nutrient cycles, the influence of climatic change on soil processes and soil-plant relationships, carbon sequestration, and the role of soils in climatic change and ecological and environmental processes.