| Summary: | The article presents the results of the optimized plant nutrition effecting the economic efficiency of blue lupine growing to produce grain. The purpose of our studies was to conduct the economic evaluation of the use of basic fertilizer and foliar feeding of blue lupine on sandy-loam sod-podzolic soils. The field experiments were conducted during 2016–2018 under the conditions of the Institute of Agriculture of the Polissia NAAS of Ukraine.
It is established that the investigated factors have a positive effect on the productivity of blue lupine and economic indicators of the cultivation efficiency of the crop. On average, during the years of research, the yield of blue lupine was 0.98–2.54 t/ha, depending on the nutritional background and foliar nutrition. The yield of blue lupine, depending on the optimization of the main fertilizer, increases by 10.3–25 %. Depending on the foliage application in the budding phase with micro- and micro-fertilizers, the yield increase of grain varies from 0.1 to 0.74 t/ha, depending on the nutrition background.
According to the results of the calculations, it is determined that the cost of blue lupine per hectare increases by UAH 18.6–6.18 thousand compared to the variant without fertilizer depending on the background of the main fertilizer and foliar fertilization. The highest net profit for growing blue lupine to produce grain was obtained by complex foliar fertilization with organo-mineral fertilizers against the background of N30P60K60 introduction into the main fertilizer. Basing on the analysis of the obtained economic indicators it is established that in the conditions of Polissia of Ukraine on sandy-loam sod-podzolic soils, the use of basic fertilizer and foliar fertilization are economically advantageous elements of the technology of growing blue lupine. Further studies should focus on the study of the optimization influence of nutritional background on blue lupine grain quality in Ukrainian Polissia.
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