Changes in some physical properties of soils in the chronosequence of self-overgrown dumps of the Sokolov quarry-dump complex,Czechia |
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| Authors: | V Kurá? J Frouz M Kurá? A Mako V Shustr J Cejpek O V Romanov E V Abakumov |
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| Institution: | 1.Czech Technical University of Prague,Prague,Czech Republic;2.Institute of Soil Biology, Biological Center,Academy of Sciences of the Czech Republic,?eské Budéjovice,Czech Republic;3.University of Pannonia,Keszthely,Hungary;4.St. Petersburg State University,St. Petersburg,Russia;5.Institute for Environmental Studies,Charles University in Prague,Prague,Czech Republic |
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| Abstract: | The water-physical properties (bulk density, air conductivity, texture, water content, and temperature dynamics) were studied
in a chronosequence of soils developing on self-overgrowing quarry-dump complexes in the area of Sokolov, Czechia. The area
overgrown for 12 years was covered by a thin grass cover; osiers were observed after 20 years of overgrowth; a broadleaved
forest was found on a plot after 45 years of overgrowth. The particle-size distribution in the soil was determined using peptization
by pyrophosphate and the FAO method. When the soil was prepared by the FAO method, a predominance of physical clay (62–72%)
in the dump material was revealed; at the use of pyrophosphate peptization, the content of this fraction was lower (18–19%).
The observed differences can be due to the incomplete degradation of the microaggregates composed of clay particles during
the peptization by pyrophosphate. A decrease in the field water content of the soils with the increasing time of the dump’s
overgrowth was observed. This could be attributed to the more significant evapotranspiration of the perennial woody vegetation
compared to the herbaceous plants, which agreed with the data on the projective cover of plants and their root biomass. A
decrease in the soil temperature in the root-inhabited layer (in the diurnal variation) with the age of succession was also
observed. The analysis of the data on the field soil water content and their comparison with the results of the laboratory
measuring of the wilting points indicated that the development of plants could be restricted by a water deficit at the 20-
and 45-year-old stages of the succession. |
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