Effect of mineral fertilizers on productivity and quality of yellow lupine cultivated on soddy-podzolic sandy soil

The article presents the results of investigations carried out in a field experiment on sod-podzolic sandy soil contaminated with radionuclides, the efficiency of influence of doses and kinds of potassium fertilizers on the yield, 137 Cs accumulation and fodder value of yellow lupine was studied. The carried out researches showed that the optimum doses of phosphorus-potassium fertilizers for getting an increased yield of green mass is P 45 K 150 , in both studied types of potassium fertilizers. To get the maximum grain yield of lupine, the optimal doses of mineral fertilizers are P 45 K 150 and P 45 K 210 . Analyzing the effect of different types of potassium fertilizers on the formation of yellow lupine grain yield, it can be noted that the use of potassium fertilizer - Kalimag, the yield was higher than that of potassium chloride. To decrease accumulation of 137 Cs in lupine green mass below permissible level, the doses of mineral fertilizers shouldn’t be less than P 45 K 150 . Maximum decrease of radionuclides in the grain was noted in the variant P 45 K 210 (Kmg).