K. Sh. Kazeev, L. V. Romadova, Yu. V. Akimenko, S. I. Kolesnikov
Southern Federal University, prosp. Strikes, 194/1, Rostov-on-Don, 344090, Russian Federation
Abstract. In model experiments we investigated the change of the biological activity of soils (carbon dioxide release intensity and catalase activity) when introducing Bastion insecticide and Eagle herbicide at high (100 mg/kg soil) doses during the first 7 days of exposure. The studied objects were subtypes of brown soils of the Western Caucasus (poorly unsaturated, acid and podzolized) possessing significant differences in the medium reaction (pH(KCl) = 3.7–5.7), humus content (5.3–8.5%), and granulometric composition (light loamy and heavy loamy). The impact of modern drugs on biological indicators depended on the soil properties, exposure time and type of pesticide. In the case of contamination with various pesticides, both suppression and stimulation of biological activity were possible. The greatest influence on the intensity of soil respiration was recorded on the first day after the application of the drugs under study. In a week, the biological activity of acid and podzolized brown soil stabilized significantly. The respiration intensity of poorly unsaturated brown soil increased 6.5 times relative to control values in a day after contamination with Bastion insecticide. In a week, this effect subsided. The introduction of Eagle herbicide led to a progressive increase in the intensity of the soil respiration with a maximum in 7 days (ninefold increase). In the case of pollution with high doses of insecticide or herbicide, catalase activity changed to a lesser extent, more often with a trend of slight inhibition. Significant decrease in catalase activity (11–15%) with the introduction of both pesticides was recorded only in acid brown soils.
Keywords: pollution; brown forest soils; soil respiration; enzymatic activity.
Author Details: K. Sh. Kazeev, D. Sc. (Geogr.), prof. (е-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); L. V. Romadova, post graduate student; Yu. V. Akimenko, Cand. Sc. (Biol.), assoc. prof.; S. I. Kolesnikov, D. Sc. (Agr.), head of department.
For citation: Kazeev K. Sh., Romadova L. V., Akimenko Yu. V., Kolesnikov S. I. Influence of Pesticides on the Biological Activity of Brown Soils in the Western Caucasus. Dostizheniya nauki i tekhniki APK. 2019. Vol. 33. No. 7. Pp. 48–50 (in Russ.). DOI: 10.24411/0235-2451-2019-10712.