Musienko L. Optimization of lentil fertilization system on podzolic chernozem of the Right-Bank forest-steppe of Ukraine

The purpose of the research was to optimize the lentil nutrition system by establishing the optimal mineral fertilizer doses in combination with pre-sowing seed inoculation with nitrogen-fixing bacteria, the use of sulfur and molybdenum to obtain a high and quality harvest on podzolic chernozem of the Right-Bank forest-steppe. For the first time, the lentil fertilization system has been developed under the conditions of the Right-Bank forest-steppe of Ukraine, which provides for the introduction of nitrogen fertilizer starting doses on a phosphorus-potassium background, improvement of sulfur and molybdenum plant nutrition and pre-sowing seed inoculation. The lentil fertilization system has been improved by specifying the forms, doses of mineral fertilizers and their combination with seed treatment with the bacterial preparation. Further development of the substantiation of the possible reduction of nitrogen fertilizer doses by carrying out pre-sowing lentil seed inoculation with the bacterial preparation, introduction of sulfur and molybdenum was recieved. The practical significance of the obtained results lies in the development of a scientifically based system of lentil fertilization, which will make it possible to obtain high and quality crops with minimal economic and energy costs. The conducted research made it possible to evaluate the impact of various fertilizer products on the parameters of soil nutritive regime, the yield and quality of lentil, the balance of soil nutrients. They are the basis for the development of the lentil fertilization system on chernozem podzolic of the Right-Bank forest-steppe, which will ensure an increase in productivity of 0.86–0.90 t/ha with a profit from fertilization and inoculation of 11.0–13.6 thousand UAH/ha.