| Abstract [eng] |
Soil heavy metal pollution caused by industrialization and anthropogenic activities has become a global and widespread issue. Among the various approaches of heavy metal contaminated sites remediation in situ, phytoremediation technologies receive special attention. Soil moisture content variation with ongoing climate change will have an impact on plant biomass production and soil pollutant behavior, and it will affect phytoremediation. The purpose of the study was to determine how soil water content affects the ability of the energy plant summer rape (B.napus L.) to phytoremediate Cd-contaminated soil (1-250 mg kg-1). Summer rape growth, Cd bioaccumulation and removal efficiency were assessed at optimal, reduced and elevated soil water contents (SWC). B. napus demonstrated strong resistance to Cd toxicity as well as the capacity to phytoextract Cd from the soil. While removal effectiveness was determined by rape growth and Cd soil concentrations, Cd accumulation in oilseed rape increased with Cd soil concentration. B. napus coped well with low and moderate Cd pollution, whereas high Cd soil pollution had a significant negative impact on plant growth , resulting in low Cd removal efficiency. Plant growth, Cd accumulation, and removal from the soil were influenced by SWC. Oilseed rapes grown in elevated SWC had higher biomass than those grown in reduced SWC, despite the fact that the adverse effect of Cd was more severe at higher SWC. Elevated SWC increased Cd bioaccumulation from soil, whereas reduced SWC resulted in decreased Cd bioaccumulation. The highest Cd removal efficiency is guaranteed by the optimal SWC, whereas a lack of or excess of soil water limits B. napus phytoremediation potential and prolongs removal process. |
