Long-term effects of potassium chloride, wood ash, and EDTA on Cs soil-plant transfer in a mixed forest of Ukraine.

We conducted a 10-year field experiment to study the effects of potassium chloride, wood ash, zinc, and manganese on reducing Cs uptake by young leaves and green shoots of common dwarf shrubs and tree species near the Chornobyl Nuclear Power Plant. A field experiment had four treatments: a control with no fertilisation, and three fertilised treatments: potassium fertiliser (KCl), a combination of potassium fertiliser and wood ash (KCl + Ash), and a solution providing zinc and manganese (EDTA). There was approximately 30 % decrease in Cs uptake by most of the studied plants species growing on plots fertilised with KCl compared to unfertilised plots during intermediate (2014-2016) and late (2018-2021) periods.

Soil fertilisation with Cs-contaminated and uncontaminated wood ash as a countermeasure to reduce Cs uptake by forest plants.

The purpose of present study was to find out whether wood ash with a high pH value and neutralizing capacity reduces Cs uptake by forest plants many years after the radionuclide fallout. The effects of one-time point fertilisation with Cs-contaminated and uncontaminated wood ash alone or in combination with KCl on Cs transfer from soil to young leaves and green shoots of various dwarf shrubs and tree species were examined in a long-term fertilisation experiment (2012-2021) conducted in Bazar mixed forest, around 70 km from Chernobyl nuclear power plant. The results indicated minor effects of soil fertilisation, although there were differences between Cs uptake by species and years.

Interception and retention of wet-deposited radiocaesium and radiostrontium on a ley mixture of grass and clover.

The aims of this study were to assess the potential radioactive contamination of fodder in the case of accidental radionuclide fallout, and to analyse the relationship between interception and retention of radionuclides as a function of biomass and Leaf Area Index (LAI). The interception and the retention of wet deposited (134)Cs and (85)Sr in ley (a mixture of grass and clover) were measured after artificial wet deposition in a field trial in Uppsala (eastern central Sweden). The field trial had a randomised block design with three replicates.

Accumulation of wet-deposited radiocaesium and radiostrontium by spring oilseed rape (Brássica napus L.) and spring wheat (Tríticum aestívum L.).

The accumulation of (134)Cs and (85)Sr within different parts of spring oilseed rape and spring wheat plants was investigated, with a particular focus on transfer to seeds after artificial wet deposition at different growth stages during a two-year field trial. In general, the accumulation of radionuclides in plant parts increased when deposition was closer to harvest. The seed of spring oilseed rape had lower concentrations of (85)Sr than spring wheat grain.

Copper, zinc, and cadmium in various fractions of soil and fungi in a Swedish forest.

Ectomycorrhizal fungi profoundly affect forest ecosystems through mediating nutrient uptake and maintaining forest food webs. The accumulation of metals in each transfer step from bulk soil to fungal sporocarps is not well known. The accumulation of three metals copper (Cu), zinc (Zn) and cadmium (Cd) in bulk soil, rhizosphere, soil-root interface, fungal mycelium and sporocarps of mycorrhizal fungi in a Swedish forest were compared.