INFLUENCE OF HUMUS STATUS OF SOD-PODZOLIC LOAMY SAND SOILS ON THE ACCUMULATION OF137Cs AND90Sr RADIONUCLIDES BY FORAGE CROPS

Abstract

In the field experiments conducted on sod-podzolic loamy sand soil (Podzoluvisol) сlose negative correlations have been found between organic matter content and¹³⁷Cs и⁹⁰Sr accumulation by forage crops. The humus content at which the minimum accumulation of¹³⁷Cs is noted for corn - 3,15 %, timothy grass - 3,24 %, clover - 2,92 %, alfalfa - 2,86 %; the minimum accumulation of⁹⁰Sr for clover - 3,17 %, corn - 3,06 %, alfalfa - 3,62 %; timothy grass - 3,34 % and аrctic clover - 2,11 %. The most intensive decrease in radionuclides in plants with an increase in the content of humus in the soil is observed from 1 to 2,5 %