PRODUCTIVITY OF BLUE LUPIN ON SODDY PODZOLIC SANDY LOAM SOIL DEPENDING ON FERTILIZERS

The article provides the investigation results as for the impact of a main fertilizer and foliage application upon the yield capacity of blue lupin grains under conditions of Ukrainian Polissia. The investigation was carried out within 2016-2018 on soddypodzolicsandy loam soils. The average monthly air temperature and the depth of precipitation during the main phenological phaseof blue lupindiffered markedly fromthe longtime average annualcharacteristics. The paper proves that the weather conditions within the reference period and considerably affected the growth, development, and the productivity of blue lupin. The plants had enough warmth but suffered from the adverse effect of poorwater availability in 2016 and 2018 that triggered the deterioration of the growth, development as well as the productivity of blue lupin. According to the research, the yield capacity of blue lupin on soddypodzolicsandy loam soils during the three years fluctuated within 0.98-2.54 tons per hectaredue tothe fertilizing system and climate conditions during the vegetational season. The application of various mineral fertilizers in 2016-2018 with respect to the norm N₃₀P₆₀K₆₀ during the main tilling made it possible to gather a crop of blue lupin grains within 0.12-0.26 tons per hectare, much higher results in comparison with the control (without fertilizers). Bluelupinfoliage application during bud-formation period with the fertilizing complex of Crystalon, Calcined Kieserite, Humifield increased the harvest by 37-64% with regard tothe control and depending on the background of the main fertilizer. The highest productivity of blue lupin (Peremozhets breed, 2.19 tons per hectare) within the three-year period was obtained due to the complex foliage application with Crystalon, Calcined Kieserite, Humifield on the background of the main fertilizer N₃₀P₆₀K₆₀ which involves the application of mineral fertilizer Arvi in amounts of 300 kg per hectare