STUDYING THE SUNFLOWER NUTRITION SYSTEM IN THE CONDITIONS OF THE NORTHERN STEP OF UKRAINE

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, 36014, ds.vavilova@ukr.net

The article discusses the effectiveness of the use of mineral fertilizers, mimic fertilizers and growth stimulants on sunflower in the conditions of the northern steppe of Ukraine. The purpose of the research was to optimize the mineral nutrition of sunflower and relieve stress in plants from anthropogenic factors. The research showed that, under the conditions of the steppe zone of Ukraine, the use of microfertilizers and growth regulators has positive effect on growth and development of sunflower plants. Sunflower top-dressing with liquid mineral fertilizers in the phase of 5-6 pairs of true leaves provides yield increase of 0.25 t/ha when using N10P30 RKD 10-34 and N30 KAS-28 mixture, or separately associated with application of N45P60K45 granulated mineral fertilizers under plowing. During study of norms of mineral fertilizers under pre-sowing cultivating, the best results were obtained with N90P60 and N60P90 norms.

Key words: The article discusses the effectiveness of the use of mineral fertilizers, mimic fertilizers and growth stimulants on sunflower in the conditions of the northern steppe of Ukraine. The purpose of the research was to optimize the mineral nutrition of sunflower and relieve stress in plants from anthropogenic factors. The research showed that, under the conditions of the steppe zone of Ukraine, the use of microfertilizers and growth regulators has positive effect on growth and development of sunflower plants. Sunflower top-dressing with liquid mineral fertilizers in the phase of 5-6 pairs of true leaves provides yield increase of 0.25 t/ha when using N10P30 RKD 10-34 and N30 KAS-28 mixture, or separately associated with application of N45P60K45 granulated mineral fertilizers under plowing. During study of norms of mineral fertilizers under pre-sowing cultivating, the best results were obtained with N90P60 and N60P90 norms.