Application of new organo-mineral complex Gumiton on pea-oat mixture in case of soil Cd contamination and NPK fertilizer application

Abstract

The greenhouse experiment on sod-podzolic soil was conducted to study the effect of new organo-mineral complex Gumiton on productivity and quality of the pea-oat mixture, the intake of Cd and trace elements into the biomass. It was found that the foliar dressing of growing plants with Gumiton increased the biomass by 11-51% as compared to the control depending on the agricultural background; and on the soil with Cd₁₅ - by 6% relative to Cd₁₅. Regarding NPK fertilizer application background, Gumiton increased the yield of the pea-oat mixture by 8% as compared to the NPK fertilizer variant and by 34% compared to Cd₁₅. Foliar dressing of plants with Gumiton improved feed quality indices. In the variant NPK fertilizer + Gumiton, the content levels of ash, crude protein and fat increased by 38%, 17%, and 10% as compared to the control. In the variant Cd₁₅ + Gumiton, the ash and protein content levels increased by 34% and 16% as compared to Cd₁₅. Spraying of plants with the preparation against the background of NPK fertilizer contributed to increased values of these indices by 47.5% and 27% compared to Cd₁₅ and increased crude protein content by 9% compared to the NPK fertilizer + Cd₁₅ variant. The application of Gumiton on soil without Cd₁₅ increased the B content in the biomass of the pea-oat mixture by 7%. Combined application of the preparation and fertilizer increased the content levels of B and Mo by 8% and 48%; Mn - 5 times compared to the control; Mo and Mn by 32% and 15%, respectively, compared to the NPK fertilizer variant. The application of Gumiton on soil with Cd₁₅ reduced the metal accumulation by plants by 11%. Foliar dressing of plants with Gumiton contributed to increased concentrations of B, Mn, Mo by 13%, 23% and 52% compared to the Cd₁₅ variant. Combined application of NPK fertilizer and Gumiton on soil with Cd₁₅ increased the content levels of B, Mo and Mn in plants by 13%, 20% and 6% compared to the Cd₁₅ + NPK fertilizer variant.