Hydrophysical Properties of the High-Ash Lowmoor Peat Soils
- Authors: Shein E.V.1,2, Pozdnyakova A.D.3, Shvarov A.P.1, Il’in L.I.4, Sorokina N.V.1
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Affiliations:
- Lomonosov Moscow State University
- Dokuchaev Soil Science Institute
- Dmitrov Branch of the All-Russia Research Institute of Land Reclamation
- Vladimir Research Institute of Agriculture
- Issue: Vol 51, No 10 (2018)
- Pages: 1214-1219
- Section: Soil Physics
- URL: https://journals.rcsi.science/1064-2293/article/view/224764
- DOI: https://doi.org/10.1134/S1064229318100113
- ID: 224764
Cite item
Abstract
The water retention curve (WRC), density, botanical composition, and ash contents were determined for high-ash lowmoor peat soils (Rheic Sapric Histosols) developing on the floodplain of the Yakhroma River (Moscow oblast) from the herb–hypnum and hypnum peat enriched in carbonates, agromineral peat soils (Rheic Drainic Sapric Histosols (Mineralic)), and peat soils developed from woody peat underlain by herb, sedge, and woody peat layers (Rheic Sapric Histosols (Lignic)). The WRC was determined by capillarimetric method in the range of water pressure from 0 to 80–90 кPa. For the studied peat soils, the WRC represents a close to linear dependence of the water content on the water pressure in semilogarithmic scale. In contrast to mineral soils, a characteristic point of the air-entry pressure is virtually absent on the WRC of peat soils. The WRC of peat largely depended on their density: denser peat samples were characterized by a higher water content at the same water pressure, which attests to the increased water retention capacity. An increase in the degree of decomposition of peat and its ash content also leads to the rise in the water retention capacity, but the effect of these factors is considerably smaller than the effect of peat density.
About the authors
E. V. Shein
Lomonosov Moscow State University; Dokuchaev Soil Science Institute
Author for correspondence.
Email: evgeny.shein@gmail.com
Russian Federation, Leninskie gory 1, Moscow, 119991; per. Pyzhevskii 7, Moscow, 119017
A. D. Pozdnyakova
Dmitrov Branch of the All-Russia Research Institute of Land Reclamation
Email: evgeny.shein@gmail.com
Russian Federation, pos. Emmaus 27, Kalinin district, Tver oblast, 170530
A. P. Shvarov
Lomonosov Moscow State University
Email: evgeny.shein@gmail.com
Russian Federation, Leninskie gory 1, Moscow, 119991
L. I. Il’in
Vladimir Research Institute of Agriculture
Email: evgeny.shein@gmail.com
Russian Federation, ul. Tsentral’naya 3, pos. Novyi, Suzdal district, Vladimir oblast, 601261
N. V. Sorokina
Lomonosov Moscow State University
Email: evgeny.shein@gmail.com
Russian Federation, Leninskie gory 1, Moscow, 119991