Influence of xenobiotics on the microbiological and agrochemical parameters of soddy-podzolic soil |
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Authors: | Email author" target="_blank">N?D?Vakkerov-KouzovaEmail author |
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Institution: | 1.Agrophysical Research Institute,Russian Academy of Agricultural Sciences,St. Petersburg,Russia |
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Abstract: | We studied the influence of various chemical compounds, i.e., azobenzene (an insecticide and acaricide), nitrification inhibitors
(DCD, dicyandiamide and DMPP, and 3,4-dimetylpyrazolphosphate), and inhibitors of urease activity (HQ-hydroquinone), on the
agrochemical and microbiological parameters of a soddy-podzolic soil. It is proved that these xenobiotics are able to influence
the agrochemical parameters (the pH and the content of NO3− and NH4+, the microbial activity (the basal respiration, the microbial mass carbon, and the microbial quotient), and the number of
bacteria of different physiological groups in soddypodzolic soil. The influence of the xenobiotics was preserved for some
time, which testified to their persistence in the soil. Upon cultivating the soil microorganisms in different media, the growth
of the heterotrophic bacteria was inhibited, the radial growth velocity was slowed down, and the sporogenesis of the micromycetes
was retarded. The toxic effect of the xenobiotics was higher with their increasing concentrations. |
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