FEATURES OF THE KINETICS OF DEGRADATION OF DARK GRAY PODZOLIZED SOIL OF LVIV ROZTOCHIA
Journal Title: Вісник Львівського університету. Серія географічна - Year 2017, Vol 51, Issue
Abstract
The kinetics of mechanical, water degradation and deflation of dark gray podzolized soils of Lviv Roztochchya has been investigated. By the equation of the velocity of these processes, their constant of the reaction and order has been determined: for deflation (V=4,0645·C0,8625), water degradation (V=0,2829·C0,7559), mechanical degradation (V=0,7363·C1,5173). The processes of disaggregation of soil particles due to water and wind degradation of dark gray podzolized soil had been occurred as unilateral first-order reactions. Mechanical degradation in the soil is a more complex process of heterogeneity (n = 1,5), in which the formation of nuclei (particles <0,25 mm in size) on the surface of the soil aggregate occurs in several stages. Has been established that in the mechanical degradation of dark gray podzolized soil the equilibrium state reaches through 2–3 minutes, after deflation – after 10 minutes of wind action at a speed of 2,2 m/s, for water degradation – after 12 minutes, when the micro aggregate particles are 25 %, 16 % and 2 % respectively. Hence, dark gray podzolized soils exhibit a lower ability to aqueous deformation than to deflation, which is confirmed by a light-grit granulometric composition, brylove. First of all, this has been due to the slowest response among these processes. Secondly, the dissolution of soil aggregates has been due to the thickness, the area of the diffusive layer and the diffusion coefficient. Low anti-erosion resistance of dark gray podzolized soil due to mechanical degradation is associated with two-stage; cloakiness and low bending of brylove.
Authors and Affiliations
Oksana Bonishko
Keywords
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