ENERGY AND THERMODYNAMIC CHARACTERISTICS OF PARENT MATERIAL AND RENDZINAS (RENDZIC LEPTOSOLS) OF THE PODILSKI TOVTRY
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2018, Vol 23, Issue 1
Abstract
Problem Statement and Purpose. In recent years, the practice of applying energy and thermodynamic characteristics of parent material and soils to the establishment of the potential of soil formation has become more widespread. The development of this area of research creates certain possibilities for using the thermodynamic characteristics of soils and parent material: the energy of the crystalline lattice, Gibbs free energy and the entropy of the mineral part to assess the ability of rocks to soil formation. Therefore, it is extr emely promising and topical to study the processes of soil formation from the energy and thermodynamic point of view. The purpose of the study is to establish the energy and thermodynamic characteristics of parent material and rendzinas (Rendzic Leptosols) of the Podilski Tovtry. Data & Methods. During 2013-2017 we laid down 5 modal sections. The system of soil sections represents rendzinas in different lands: arable lands, fallows and virgin areas under forest and meadow phytocenoses. To install Energy and thermodynamic characteristics of parent material and rendzinas (Rendzic Leptosols) of the Podilski Tovtry we have applied methods based on data conversion of the gross chemical composition, humus content, bulk density of the studied soils and parent material in the energy indices: the energy of the crystalline lattice (Um), Gibbs free energy (Gm298 15) and the entropy (Sm298 15) and the humus energy. Results. A characteristic feature of the rendzinas and parent material is the high energy reserves of the crystalline lattice (U111 = 6951.44-17728.82 kJ/g) and Gibbs free energy (Gm29815 = 1089.07-1327.72 kJ/g) and slightly changing values of entropy (Sm29815 = 65.12-67.75 kJ/gxdegrees), which is due to significant CaO content. The investigated parent material are characterized by a high content of nonsilicon energy, since they are enriched predominantly on CaC03, in contrast to rocks that have high crystalline lattice energies due to the high content of silicon. This crystalline lattice is strong and harder to break down. This creates conditions for the accumulation of residual minerals in the soil. This implies indirectly about residual claying of soil profile. The upper genetic horizons of the rendzinas profile are characterized by the highest values of the energy of the crystalline lattice (Um). The values are within the range 16569.21-17778.82 kJ/g and decrease down the profile to 7932.12-13318.39 kJ/g. This is due largely relative content of Si02. which has the highest energy figures and, accordingly, most influences on their reserves in the soil. For The studied rendzinas a significant variability of humus energy is characteristic. Typical rendzinas, formed on dense limestones of the tops of the Podilski Tovtry, are characterized by the largest reserves of energy in humus (2347-2488 mJ/ha in 10 centimeters of humus horizon Hca). Brown pararendzynas. formed on the slopes of the Tovtry. characterized by minimal humus energy (742.13 mJ ha).
Authors and Affiliations
V. V. Harbar
Keywords
Related Articles
- EP ID EP508011
- DOI 10.18524/2303-9914.2018.1(32).144576
- Views 88
- Downloads 0
MORPHODYNAMICS AND GEOLOGICAL LEGACY OF BERM SCARPS ALONG NON-TIDAL (UKRAINE) AND MICROTIDAL (THE BAHAMAS) COASTS
Berm scarps are erosional features characteristic of all coastal accumulation forms. Their profiles range from steep to overhanging (ψ>90) and evolve through slope adjustment and burial by swash and aeolian accretion. Ex...
MINERAL PARAGENESES OF BRINE AND BOTTOM SEDIMENTS IN THE KUYALNIK ESTUARY AND THEIR GENETIC CLASSIFICATION
Problem Statement and Purpose. Serious attention is being paid to the Kuyalnik Estuary and its environmental state in recent years. Most often chemical composition of brine and bottom sediments is being studied. However,...
HYDROGEOLOGICAL PROBLEMS EMERGING IN INTENSIVELY CULTIVATED SEISMICALLY ACTIVE REGIONS
In the Crimean seismically active region’s urban population is over 65 %. All large cities, sanatorium-resort centers are located in 7 – 8 magnitude seismic zones. Therefore, the forecasting of earthquakes on the basis o...
ARCHAEOLOGICAL SITES WITHIN THE MIDDLE PART OF THE SOUTHERN BUG RIVER
Author the paper from the second half of the 1990th has carried out systematic investigations of the territory of the Middle Pobuzhie. The newest facts about archeological monuments of the study area are given. The monum...
CHARACTERISTICS OF TRACE METALS SPATIAL DISTRIBUTION IN SEA BED SEDIMENTS OF THE NORTH-WESTERN BLACK SEA SHELF
The present work describes the characteristics of trace metals (TM) content and TM spatial distribution on the north-western Black Sea (NWBS) bottom as identified in the area of investigation (Ukrainian coastal waters),...