The Impact of Pesticides on the Microbial Community of Agrosoddy-Podzolic Soil
2020
Astaykina, A. A. | Streletskii, R. A. | Maslov, M. N. | Belov, A. A. | Gorbatov, V. S. | Stepanov, A. L.
The impact of three types of pesticides (herbicide metribuzin, insecticide imidacloprid, and fungicide benomyl) on the structure of microbial complexes and indicators of biological activity of agrosoddy-podzolic soil (Moscow oblast) has been assessed using the method of next-generation sequencing (NGS). The pesticides have been applied both separately and together at one- and tenfold rates. It has been found that pesticides have a greater impact on the fungal community in comparison with the prokaryotic community; in the latter, only changes in the abundances of the phyla of Actinobacteria and Proteobacteria have been observed. The study of fungal communities with the use of molecular-genetic analysis has revealed two dominant divisions of fungi in all soil samples: Ascomycota (72.6 ± 8.0%) and Basidiomycota (26.0 ± 7.7%). Moreover, in the samples treated with tenfold rate of pesticides (both in mixture and separately), the abundances of representatives of the Basidiomycota division have increased. Pesticide application has a short-term stimulating effect on the carbon content of microbial biomass. It has been shown that insecticide imidacloprid stimulates nitrogen fixation, whereas other types of pesticides do not affect this factor.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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