Abstract
The paper aimed to analyze the effect of the application of organic fertilizer biohumus on the content of heavy metals in the soil and spring barley plants in the Donetsk industrial region of Ukraine. Application of biohumus in the organomineral nutrition system led to decrease the content of mobile forms of copper, zinc, lead, cadmium by 17.1%, 23.4%, 22.6% and 23.1% respectively. The content of copper and zinc in the grain was almost at the control level, the accumulation level of lead and cadmium in the spring barley grain decreased by 1.6 and 1.4 times, respectively. The variant of the organo-mineral nutrition system with foliar treatment of plants with biostimulant regoplant allows to reduce the amount of traditional mineral fertilizers by up to 50% while maintaining the yield level, to reduce the coefficients of biological absorption of lead and cadmium by 1.4 times compared to the control. To reduce the risk of soil and grain contamination by heavy metals in industrial regions, it is advisable to use an organo-mineral fertilizer system.
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