INFLUENCE OF TECHNOLOGICAL METHODS OF SUNFLOWER GROWING ON AGRO-PHYSICAL SOIL PROPERTIES

Kokhan Andrey V.  -  Candidate of Agricultural Sciences, Director, Senior Research Associate, Poltava State Agricultural Experimental Station named after N. Vavilov of the Institute of Pig Breeding and Agro-Industrial Production of the National Academy of Agrarian Sciences of Ukraine, 86, Shvedskaya str., Poltava, Ukraine, (0532) 54-57-93, ds.vavilova@ukr.net

Samoilenko Elena Anatolyevna  -  Candidate of Agricultural Sciences, Scientific Secretary, Poltava State Agricultural Experimental Station named after N. Vavilov of the Institute of Pig Breeding and Agro-Industrial Production of the National Academy of Agrarian Sciences of Ukraine, , 86, Shvedskaya str., Poltava, Ukraine, (0532) 54-57-93, ds.vavilova@ukr.net

The article presents the results of studies of the influence of the main tillage methods and the fertilizer system on the agrophysical parameters of the soil. The aim of the research was to improve the technology of growing sunflower under conditions of insufficient moisture in the forest-steppe zone. The research results showed that the elements of the technology of cultivation of the crop directly influence the structure of the soil and its physical properties. So, it was found that plowing provides a lower soil density of 13,5 %; 21,2 % and 148,1 % relative to flat-cutting and small-scale treatments, while this indicator increases during the growing season of the crop. The content of agronomically valuable fractions in the soil with a size of 0,25–5,00 mm in the arable layer changed under the influence of the main tillage, when plowing their amount was 47,8 %, with flat-cutting and small tillage – 38,9 % and 38,3 %, respectively.

Key words: primary soil treatment, mineral fertilizer system, soil density, soil structure, spaces between rows, sunflower