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Orenburg State University january 23, 2022   RU/EN
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Mady A.Y., Shein E.V.
MODELING SOIL THERMAL DIFFUSIVITY AS A FUNCTION OF SOIL MOISTURE [№ 12 ' 2016]
Soil thermal parameters are playing an important role in soil heat transfer. Mathematical models and Pedotransfer functions (PTFs) are considered the modern soil physics. Thermal diffusivity is an important parameter of the soil thermal properties, used to study the soil heat flow. Recently, PTFs are widely used to forecast thermal properties. The aim of the work is to ascertain the relation between thermal diffusivity and soil moisture by a model. The relationship between thermal diffusivity and soil moisture by is described by a quadratic equation, and then determined the parameters of this equation using PTFs. The determination coefficient (R2), Root Mean Square Error (RMSE) and Willams-Kloot test exhibited that the proposed PTF of the quadratic equation is better than Arkhangelskaya (2004) model for predicting soil thermal diffusivity as a function of soil physical properties.

Shein E.V., Pochatkova T.N., Holodkov A.I.
THE RHEOLOGICAL PROPERTIES OF SOD-PODZOLIC SOIL [№ 6 ' 2016]
Formation, stability and, on the other hand, the degradation of soil aggregate structure are the processes related to fundamental physical and chemical properties of the solid phase soil surface and are their functional manifestations. Rheological investigations allow to reveal the inner nature of the strength properties and provide an integrated assessment of the strength of the bonds involved in the formation of soil structure. In modern conditions of intensive anthropogenic load all the soil are exposed to a greater or lesser susceptible physical and technological degradation, which is manifested at different levels of structural organization. The purpose of the study — by modern methods of soil rheology set especially rheological behavior of genetic horizons of cultivated sod-podzolic soil under shear loads. The physical and chemical properties of the genetic horizons of cultivated sod-podzolic soils significantly affect the rheological behavior of the soil. Rheological properties were determined using a rotary viscometer "Reotest 2" with a cylindrical measuring device. The strength of the soil structure parameters, such as the commencement of the pressure of the soil suspension and the beginning of the destruction of the structure in the cultivated horizon is 20–40 kPa, then reduced in eluvial and increases in the illuvial horizon of up to 70 kPa. The viscosity of the start and end of movement in arable soil suspension horizons vary in the range of 110–120 Pa*s, and in horizons samples A-ELB-B and A-EL — in the range of 140–170 and 6–80 Pa*s, respectively. When shear deformations of soil horizons of sod-podzolic soil is predominant phenomenon rheopexy, with different participation tiхotrophic processes.

Shein E.V., Rusanov A.M.
MOSCOW AND ORENBURG UNIVERSITIES: JOINT FUNDAMENTAL RESEARCH ON SOIL SCIENCE AND ECOLOGY IN THE FRAMEWORK OF THE RFFI [№ 13 ' 2015]
In recent years the staff of the chemical biological faculty of the Orenburg State University in collaboration with scientists of the faculty of soil science Moscow State University named after M.V. Lomonosov made for the following grants of the Russian Foundation for basic research: "The influence of physical properties and processes on the ecology of the humus of chernozems of the Urals", "Teplogeneratsii the basics of structure restoration and regeneration of degraded organic matter of soils", "Evolution of steppe chernozems of the High TRANS-Volga region under the influence of the Buzulukskiy coniferous forest" and "Post-fire transformation of the properties of steppe chernozems, their hydrothermal regime, natural vegetation and biological methods of restoring". Fundamental scientific problem, which unites all research topics, is the study of the mechanism of formation of soil structure and the role of soil organic matter, its composition in the phenomenon of structure formation. The main scientific result of the research became evidence of the leading role of amphiphilic properties of humus in the formation of stable and strong soil units, which largely determine the ecological functions of soils in the biosphere and soil fertility. Another result of the work four Ph. D. dissertations defended by postgraduate students of the Orenburg University content of work performed on these topics and a large number of scientific publications of different levels, 12 of which were published in the editions included in the citation systems Web of Science and Scopus.

Milanovskiy E.Yu., Shein E.V., Rusanov A.M., Tygai Z. N., Il'in L.I., Zinchenko S.I., Fomin D.S., Bykova G.S.
SPATIAL DISTRIBUTION OF THE ORGANIC MATTER CONTENT IN THE SOIL IN THE CENTRAL CHERNOZEM AGROLANDSCAPES [№ 6 ' 2015]
The study of the organic carbon and CaCO3 distribution of in the 80 m long transect crossing the field of agriculture and forest belt characteristic of the age showed significant differences in the distribution of organic and mineral carbon profiles in chernozems under the arable land and in the vicinity of the forest belt. This is due to a dominant role in the formation of hydrothermal conditions of reserves and the content of organic matter in the chernozem and points to the importance of assessing the physical conditions that lead to the formation conditions of accumulation of organic and inorganic carbon in soils, determining the conditions for the functioning of soil biota in steppe landscapes.

Rusanov A.M., Shein E.V., Milanovskiy E.Yu., Lazarev V.I., Tygai Z.N., Fomin D.S., Il'in L.I., Zinchenko S.I., Bykova G.S., Uкenov B.S.
FEATURES OF MIGRATION PROCESSES IN THE STEPPE LANDSCAPES SOIL UNDER THE INFLUENCE OF FOREST SHELTER BELTS [№ 6 ' 2015]
The study of the influence of forests in the steppe zone on the soil cover complexity formation is carried out by investigating the distribution of moisture and carbon organic matter and carbonates in the transect consisting of chernozems, underneath the forest shelter belts and under agricultural lands. It is primarily manifested through the formation of special hydrothermal conditions, arising under the forest belt, and entails the formation of stable soil properties such as organic carbon content.

Shein E.V., Milanovsky E.Yu., Khaydapova D.D., Bykova G.S., Yudina A.A., Chestnova V.V., Fomin D.S., Klyueva V.V.
MODERN INTRUMENTAL RESEARCH METHODS OF SOIL GRANULOMETRIC COMPOSITION, RHEOLOGICAL CHRACTERICTICS AND PROPERTIES OF SOIL OF SOLID PHASE SURFACE STUDIES [№ 6 ' 2015]
In soil science new tool measurements of distribution of particles by the sizes (laser diffraction), a contact corner of wetting, rheological characteristics, etc. get a wide circulation. Are considered given the corresponding parameters of the soil received by means of the modern equipment, results of researches are compared to data, obtained by means of classical methods. New tools and methods demand methodical works on delimitation of their applicability, optimum ranges, conditions of measurement and comparison with traditional methods of the soil. New devices the measuring particle size distribution (a laser difraktometriya), a contact corner of wetting, rheological characteristics, etc. with use of other methodical approaches find a wide circulation in soil science. Data on the corresponding soil parameters received on the new equipment, their comparison with the received classical methods are considered. New devices and methods demand big methodical work on establishment and identification of limits of their applicability, optimum ranges, conditions of measurements and their comparison with traditional soil methods.

Shein E.V., Torbik E.A.
THE RESEARCH OF SOIL CONSTRUCTIONS HYDROLOGY IN THE LABORATORY PHYSICAL AND FORECAST MATHEMATICAL MODELS [№ 6 ' 2014]
Methods of laboratory of physical and mathematical models were conducted complex research of the water movement in the soil structures. The effect of the soil construction structure and the initial water conditions on transfer of moisture at low-debit filtering was discovered. The forecast of the moisture dynamics of soil construction after filtration was implemented by the method of mathematical modeling using pedotransferny functions in the program Hydrus. Static analysis was determined the significance of difference between the results obtained using physical and mathematical modeling, but the magnitude was preserved.

Rusanov A.M., Shein E.V., Prokhorovа N.V., Alechinа G.P.
ADJACENT TO THE FOREST ECOLOGY STEPPE ECOSYSTEM [№ 10 ' 2013]
The materials comprehensive research steppe biogeocenosis located near Buzuluksky boron. Found that around a pine forest ecotone formed, the territory on which a set of attributes (hydrothermal and water regimes, soil properties, plant species composition, soil and terrestrial fauna) corresponds Ecosystem Indicators forest-steppe zone.

Shein E.V., Rusanov A.M., Anilova L.V., Dostova T.M.
WATER REGIME CHANGE TYPICAL CHERNOZEM THE FORMATION OF SURFACE LAYER PYROGENS OF DIFFERENT POWER [№ 10 ' 2012]
In this paper we analyzed the projected water regime typical chernozem and its change during the formation of the surface layer of varying thickness of pyrogenic.

Sheina N.I.
BIOSAFETY EVALUATION CRITERIA OF MICROORGANISMS USED IN THE BIOTECHNOLOGY INDUSTRY [№ 6 ' 2012]
Biosafety assessment based on the study of microbial pathogenicity and adverse action of 29 biotech strains was conducted. The dependence of the intensity immunotropic, and dysbiotic sensitive effects of the taxonomic position of microorganisms has been found. Sanitary classification of microorganisms in the degree of hazard effects was proposed and unified with the recommendations of international organizations.

Panina S.S, Shein E.V.
MOVEMENT OF WATER IN AND LOW HEAD GRAVITY FILTRATION [№ 12 ' 2011]
Soil moisture movement depends on the upper boundary conditions (the presence or absence of hydraulic pressure). It was showed in field experiments on grey cultivated soil that the presence of pressure head causes the preferential water movement. The best reproducibility of the field moisture dynamics by physically based water migration mathematical model was observed when use the data on granulometric composition.

Shein E.V., Mikayilov F.D.
THEORETICAL AND METHODICAL FEATURES OF THE HEAT CONDUCTION WITH INFILTRATION PROBLEM SOLUTION [№ 12 ' 2011]
Solution of the heat conduction with infiltration problem is suggested. This solution permits to determine the soil termodiffusivity usind some data of the quotidian variability of soil temperature under infiltration conditions.

Bogoduhov S.I., Garipov V.S, Shein E.A., Jasakov A.S.
HIMIKO-THERMAL PROCESSING OF FIRM ALLOYS OF GROUP VK [№ 10 ' 2011]
In work processes of hardening of products of firm alloys by methods of himiko-thermal processing with application of induction heating, heating in salinas, and also with without oxidising heating are considered. Results of tests of the processed products from firm alloys on durability, hardness, and also on wear resistance and tests by cutting are resulted.

Bogoduhov S.I., Kilov A.S., Shein E.A., Yasakov A.S., Haibullin R.R.
INCREASE OF OPERATIONAL CHARACTERISTICS OF HARD ALLOYS BY HEAT TREATMENT [№ 5 ' 2011]
Influence of thermal processing on structure and property of firm alloys is investigated. Possibility of reduction of size of deterioration of the cutting tool by a variation of modes of thermal processing is established.

Shein E.V., Rusanov A.M., Demchenko E.V.
PHYSICAL PROPERTIES AND AMPHIPHILIC COMPONENTS OF ORGANIC MATTER IN SOILS OF THE BOROVSK IRRIGATION SYSTEM DURING THE POST IRRIGATION PERIOD [№ 5 ' 2011]
After nearly 15 years of irrigation cessation on Borovsk irrigation system due to scaled soil salinization during the post irrigation period desalinization of the upper 40-centimeter soil occurred on relatively elevated areas while cortical solonets were formed in the meso- and micro depressions. When physical and physicochemical properties of humus in the meadow-chernozem soils are relatively favorable a noticeable increase in the proportion of hydrophobic components is observed with relative hydrophilization and general decline of humus content in the cortical solonetz.


Editor-in-chief
Sergey Aleksandrovich
MIROSHNIKOV

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