Assessment of the Effect of Sunflower Agrocenosis on the Characteristics of the Structural and Aggregate Composition of Typical Black Soil
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Bila Tserkva National Agrarian University, Soborna Sq., 8/1, Bila Tserkva, Kyivska oblast, 09117, Ukraine
Sumy National Agrarian University, H. Kondratieva St., 160, Sumy, 40021, Ukraine
National Scientific Center “Institute of Agriculture of NAAS”, Kyiv, Ukraine
National University of Life and Environmental Sciences of Ukraine, 15 str. Heroiv Oborony, Kyiv, 03041, Ukraine
National Dendrological Park “Sofiyivka” of the National Academy of Sciences of Ukraine, 12a str. Kyivska, Uman, Cherkasy region, 20300, Ukraine
Corresponding author
Yevheniia Butenko   

Sumy National Agrarian University, H. Kondratieva St., 160, Sumy, 40021, Ukraine
J. Ecol. Eng. 2024; 25(1):153-160
The research was conducted on the Bila Tserkva National Agrarian University experimental field on a typical deep, low-humus chernozem. The methods of main cultivation in the sunflower agrocenosis of grain-row crop rotation had a major influence on the soil structuring processes. The use of moldboard with boardless tillage increased the number of the most agronomically beneficial aggregates (0.25–10 mm) in the 0–10 cm soil’s layer at the beginning of the sunflower growing season by 6.0% compared to shallow loosening of the soil. By the end of the growing season in the sunflower agrocenosis in the 0–30 cm soil layer, compared to the beginning of the crop growing season, the number of agronomically beneficial aggregates (0.25–10 mm) decreased, the number of fractions larger than 10 mm and fractions smaller than 0.25 mm increased. The coefficient of structure for moldboard with boardless tillage significantly increased compared to shallow loosening. The use of shallow boardless system and moldboard with boardless tillage was led to an increase in the content of stable aggregates by 1.2–7.5%. The highest yield of sunflower was recorded for the use of moldboard with boardless tillage – 2.72 t/ha, which is significantly higher than other variants. The use of shallow tillage for 10–12 cm with disc tools led to a notable decrease in productivity compared to the control. Improving the water resistance of soil aggregates during moldboard with boardless system and shallow tillage helps to preserve the soil's potential fertility.
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