COMPARATIVE EFFECTS OF LIME AND BIOCHAR ON ACCUMULATION AND TRANSLOCATION OF CD IN DICTYOPHORA RUBROVOLVATA AND THE EVALUATION OF ITS EDIBLE SAFETY

Edible fungi easily accumulate cadmium (Cd).Lime (LM) and biochar (BC) had a passivation effect on soil Cd.However, there is limited research on Cd passivation and enrichment in Dictyophora rubrovolvata (DR).Cultivation experiments were conducted by adding LM and BC.The presence of Cd in the DR system was also examined.The results showed that the applications of LM and BC increased soil pH, with an increase range from 1.54 to 1.97 for LM and from 0.36 to 1.31 for BC.LM and BC decreased DTPA-Cd content in soil, with decreases ranging from 29.26% to 57.95% for LM and from 0.33% to 38.93% for BC.The Cd content in the different parts of DR followed the order thallus > pileus > volva.Soil pH and Cd content in different parts of DR were significantly negatively correlated.DTPA-Cd and Cd content of thallus and volva showed a significant positive correlation.Redundancy analysis revealed a significant correlation between pH, DTPA-Cd in soil, and Cd accumulation in DR.The Cd content of thalli in LM and BC decreased by 6.29%-27.33%and 2.15%-20.47%.The THQ of thallus in LM and BC was also significantly reduced, but THQ of Cd was greater than 1 for adults and children.3% LM or 5% BC could be employed for Cd-contaminated soil in DR.Compared with BC, LM was more applicable in the remediation of Cd-contaminated soils with DR.