The article presents the findings of the study on nutrient regime of podzolic black soil after long-term use of
various doses of organic and mineral fertilizers in the conditions of organic, mineral and organomineral fertilizer systems
application in field crop rotation.
The study was conducted in a stationary field experiment, established in 1964 at the experimental field of the Uman National
University of Horticulture, located in the Right-Bank Forest Steppe of Ukraine. Studies have established a decrease in mobile
nutrients in podzolic black soil after long-term (over 53 years) cultivation of field crops grown in rotation without fertilizers.
With an average annual application of 13.5 t / ha of manure and mineral fertilizers in a dose of N68P101K54 per 1 ha into crop
rotation area, the highest nitrogen content of easily hydrolyzable and mineral compounds was with an organomineral fertilizer
system and averaged 139 and 36.9 mg / kg of soil over three years, respectively. The highest content of mobile phosphorus
in the soil was provided by application of mineral fertilizers into crop rotation area at a dose of N135P135K135 (221 mg / kg) per
hectare for mineral system and 13.5 t of manure per hectar + N68P101K54 (242 mg / kg) for organomineral fertilizer system.
Long-term use of mineral and organic fertilizers in crop rotation increased the content of exchangeable potassium in the
podzolic soil by 21-69%. Among the studied fertilizer systems in the field crop rotation, the highest yield (42.8–57.8 t / ha)
of sugar beet was provided by the organomineral system. On average, over four years of research, the highest root crop
yield (53.1 t / ha) was obtained when applying under. sugar beets 45 t / ha of manure and mineral fertilizers in a dose of
N90P202K45 at the third saturation level of crop rotation (manure 13.5 t / ha + N68P101K54).
nutrient regime, podzolic black soil, manure, mineral fertilizers, field crop rotation, sugar beet