Keywords:  ₁₃₇Cs, activity, transfer factor, anthropogenic-transformed peat soil, fertilizers, potassium, nitrogen, ratio

// Мелиорация. – 2017. – №4(82).– P. 32—39

On the anthropogenic-transformed peat soil the minimum accumulation of ₁₃₇Cs with spring wheat is noted at a nitrogen-potassium ratio of 1:1.0-1.2. At a ratio of 1:0.2-0.6, nitrogen deficiency and an increase in radionuclide concentration in grain are observed due to a decrease in yield. The introduction of high rates of nitrogen fertilizers on a low background of potassium nutrition broadens the N:K ratio, which is accompanied by the formation of a potassium deficiency and a decrease in the discrimination of ₁₃₇Cs with respect to potassium when entering plants. An increase in the accumulation of a radionuclide in the grain is observed at a ratio above 1:1.5.