M. K. Zinchenko, S. I. Zinchenko
Upper Volga Federal Agrarian Research Center, ul. Tsentral’naya, 3, pos. Novyi, Suzdal’skii r-n, Vladimirskaya obl., 60126, Russian Federation
Abstract. The influence of different cultivation techniques and fertilizer systems on the activity of urease (nitrogen cycle), invertase and catalase (carbon cycle), phosphatase (phosphorus cycle) was studied in a long-term stationary field experiment on gray forest soil with the second humus-accumulated horizon in 2014–2016. In the experimental plot the second humus horizon was at the depth of 20–21 cm and had the thickness of 19–24 cm. Soil samples were analyzed in the section (barley, oat + clover with timothy, first-year clover) of the six-field grain-grass crop rotation (winter rye, spring wheat, barley, oat + clover with timothy, first-year clover, second-year clover) against backgrounds of normal and intensive fertilizer application. There were four variants of tillage: subsurface cultivation at 6–8 cm; moldboard ploughing at 20–22 cm; subsurface cultivation at 20–22 cm; idle field (the control). Agricultural use decreased enzymatic activity of soils in an agricultural system. This trend is most pronounced against the backgrounds with an annual moldboard processing at 20–22 cm: against the normal background the reduction was 20%, against the intensive background it was 15%, compared to the control (100%). Enzymatic pool similar to that of idle land was formed against the intensive background with annual subsurface cultivation at 6–8; its activity was 99%. Against intensive backgrounds of fertilizer application for all tillage methods a higher enzymatic pool was formed, in comparison with the normal background, which is due to the increase in the activity of hydrolytic enzymes of invertase (44.8–51.7 and 37.0–41.9 mg glucose/10g soil, respectively) and of phosphatase (0.70–0.87 and 0.64–0.74 mg P2O5/1g soil, respectively). The data obtained can be used in ecological and biological standardizing of agronomic impacts on agricultural systems.
Keywords: agrotechnical load; enzymatic pool; gray forest soil with the second humus horizon; soil fertility; intensification background; tillage techniques.
Author Details: M. K. Zinchenko, Cand. Sc. (Biol.), leading research fellow (е-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); S. I. Zinchenko, D. Sc. (Agr.), prof.
For citation: Zinchenko M. K., Zinchenko S. I. Influence of Agrotechnical Load on Enzymatic Activity of Gray Forest Soil with the Second Humic Horizon. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 10. Pp. 66–68 (in Russ.). DOI: 10.24411/0235-2451-2018-11015.