Mineral Nutrition Optimization as a Factor Affecting Blue Lupine Crop Productivity under Conditions of Global Climate Warming

Abstract

The scientific study presents the results concerning the influence of meteorological conditions on blue lupine crop productivity. The research substantiates the types and combinations of mineral macro- and microfertilizers providing for full realization of the biological potential of blue lupine (Lupineus angustifolius L.) under the conditions of global climatic changes. Field studies were conducted during the period of 2016-2019 on sod-mesopodzol sandy-loam soils. The average monthly temperature and the amount of precipitation during the growing season of blue lupine had some deviations from average long-term indices. During the research period the blue lupine plants were being formed under favourable temperatures, but were exposed to the negative effects of low water availability, that resulted in worth conditions for their growth and development as well as in lower grain yields. During a 3-year period of studies the crop yield was in a range of 0.98-2.54 t/ha depending on fertilization and weather conditions during the growing season. As follows from the results of correlation-regression analysis concerning the dependence of blue lupine grain yield on meteorological characteristics, it has been found that there is a correlation (close linear dependence) between weather conditions and grain yield. Herewith, a negative reaction of a sort Peremozhets to weather conditions deviations from average longstanding indices during the growing season has been registered.