ACCUMULATION OF137CS PERENNIAL CEREAL GRASSES ON PEARLY-GLAY SOIL DEPENDING FROM rates OF POTASSIUM FERTILIZERS

Abstract

Depending on the meteorological conditions of the growing season, the transition of¹³⁷Cs to the hay of perennial grasses of the first cut changes up to 4.3 times, and to the hay of the second cut - up to 3.3 times. Such fluctuations in the content of radionuclides in products are largely due to the levels of the formed productivity of herbs. When cultivating perennial grass grasses on peaty gley soil with a P₂O₅ content of 876 mg/kg and K₂O 818 mg/kg, the maximum reduction of¹³⁷Cs content in hay of the first crop by 2,3 times provides 3,5 times in hay of the second cut phosphate fertilizers in a rate of P₉₀ and potash fertilizers in a rate of K₁₈₀ (K₁₂₀ for the first cut and K₆₀ for the second cut). Hay production of perennial cereal grasses, suitable for¹³⁷Cs content for obtaining whole milk, raw milk during processing for oil and meat, meets RDU, is possible without restrictions on the density of contamination of peaty-gley soil using phosphorus and potash fertilizers in rates of P₉₀K₁₂₀ (K₉₀ under the first cut and K₃₀ under the second cut).