Change of physical properties of arable chernozem in the initial period of the after agricultural abandonment regime
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Kuupäev
2019
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Abstrakt
A field experiment was conducted in the botanical garden of the South Federal
University (Rostov-on-Don, Russia), which was aimed at converting the old arable land plot to
the arable regime. Physical properties of chernozems were studied during the first years of the
postagrogenic period in different plots, such as: a virgin steppe plot, an arable plot and an
abandoned plot. During the course of the experiment it was revealed that physical properties of
postagrogenic soils change due to vegetation development after tillage is discontinued. Within
three years of research a biological diversity of the floristic composition in the abandoned plot
increased from 9 species (during the first year) up to 38 species of plants (3 years later).
Vegetation development served as a cause of changes in physical properties of chernozems.
Temperature of the abandoned soils decreased along with soil moisture growth, if compared to
the relevant indices of the arable plot of land. Owing to the root development and cessation of the
agricultural impact, density of the upper horizon in the abandoned plot dropped by 10% on
average. A positive correlation was revealed between the chernozem density and its penetration
resistance (r = 0.70) and temperature (r = 0.73), whereas an inverse correlation was detected
between the chernozem density and its moisture content (r = -1.0).
Kirjeldus
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Märksõnad
agrogenic impact, demutation, succession, soil density, soil penetration resistance, hydrothermal conditions, articles