INFLUENCE OF DOSES OF NITROGEN AND POTASSIUM FERTILIZERS ON137Cs IN GRAIN AND PRODUCTS SPRING WHEAT IN ANTHROPOGENNO-TRANSFORMED PEAT SOILS

Abstract

On anthropogenno-transformed peat soils found that phosphate and potash fertilizers in rates of Р₆₀К_80-120 reduce intake of¹³⁷Cs in grain by 20-30%. Application of K₁₆₀ does not lead to a further substantial reduction in the transfer of radionuclides in products. Nitrogen fertilizers in rates of 60-90 kg/ha on the background Р₆₀К₁₂₀ slightly (on 4-9%) increase intake of¹³⁷Cs in grain compared with phosphorus-potassium background, and sharing them with the introduction of the copper-containing fertilizer and plant growth regulators reduce radionuclide transfer factors. Without restrictions on¹³⁷Cs soil contamination density can be cultivated spring wheat fodder purposes. In years with normal moisture possible without restrictions to cultivate the culture and food purposes with a valid¹³⁷Cs content of 90 Bq/kg. When excessive moisture limiting density of soil contamination for food grains is when making Р₆₀К₁₂₀ and nitrogen rates of 60-120 kg/ha - 28-31 Ku/km². Get foodgrains with¹³⁷Cs content of up to 60 Bq/kg in years with normal moisture content possible using N₆₀Р₆₀К₁₂₀, N₉₀Р₆₀К₁₂₀ and N₁₂₀Р₆₀К₁₂₀ densities and soil contamination, respectively 36, 33 and 29 Ku/km². In years with abundant moisture cultivation culture is limited soil contamination, respectively 20, 19 and 18 Ku/km². Recommended in anthropogenno-transformed peat soils under spring wheat fractional application of nitrogen fertilizer rate of 120 kg/ha in combination with copper-containing fertilizers and plant growth regulators, which provides an average grain yield of 42.8 q/ha .