Abstract
The effect of the insecticide Nerametrine EK-15 (containing an active supercypermetrine component) on nitrification, nitrogen fixation, CO2 production and cellulase activity of soil microorganisms was investigated. Four soil types were sampled from various localities. Supercypermetrine at 31 pmol/kg soil affected remarkably the metabolic activity of all soil samples tested by producing CO2 after a 1-d exposure. After a 14-d exposure no difference in the metabolic activity related to CO2 production was noticed in the case of garden soil where the insecticide at 31 pmol/kg soil and the unaffected control were used. As far as other samples are concerned, the supercypermetrine concentration amounting to 31 pmol/kg soil explicitly inhibited the metabolic activity of soil microorganisms. On the other hand, concentrations of 0.61 and 6.1 pmol/kg soil stimulated the metabolic activity of soil in the locality of Senica. The soil samples enriched with nutrients (organic nitrogen in urea) manifested an evident inhibition at 31 pmol/kg soil. The nitrification activity of all soil types was interrupted at 61 pmol/kg soil. Supercypermetrine 0.12 pmol/L stopped completely nitrogen fixation withA. chroococcum and that corresponding to 0.3 pmol/L stopped aerobic cellulase decomposition.
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Čerňáková, M. Effect of the insecticide nerametrine EK-15 on the activity of soil microorganisms. Folia Microbiol 38, 331–334 (1993). https://doi.org/10.1007/BF02898603
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DOI: https://doi.org/10.1007/BF02898603