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The aim of this study was to evaluate the homeopathic medicine Nux vomica in the remediation of soils contaminated with cadmium (Cd) and lead (Pb) and the bioavailability of these metals in soybean plants. To this end the soil was contaminated prior to sowing, using CdCl2H2O and PbCl2 salts in three rates, based on the resolution of the research values of resolution No. 420 of CONAMA, resulting in 0.0, 3.0 and 9.0 mg kg-1 for Cd and 89.0, 180.0 and 540.0 mg kg-1 for Pb. The homeopathic remedy Nux vomica was used in dynamizations 12, 24, 48, 96, 200 and 400 CH (Centesimal Hanhemannian), being the witness with distilled water. Medicines were applied to the soil seven days before sowing and after sowing, every 14 days applied in the plant until complete the cycle. During cultivation were evaluated development, gas exchange, nutrient composition, component production and bioavailability of metals in the plant. The results demonstrate that Nux vomica medicine interfered in height and stem diameter and CO2 assimilation, stomatal conductance and transpiration of soybean plants, but did not affect the bioavailability of metals to plants.

Ultra-diluted Solutions of Nux vomica in the Remediation of Metals in Soils and Bioavailability for Soybeans