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Updated: Feb 8, 2026

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
Published on: September 1, 2020
Impacts of a Compound Amendment on Cd Immobilization, Enzyme Activities and Crop Uptake in Acidic Cd-Contaminated
Shiping Shan1,2, Zhaohui Guo3,4, Ping Lei1
1Hunan Institute of Microbiology, Changsha, 410009, Hunan, China.
Abstract:
This study assessed the effectiveness of limestone-montmorillonite-rapeseed residue-Si fertilizer compound amendment on the bioavailability and crop uptake of cadmium (Cd) and enzyme activities in acidic paddy soils. Applying the compound amendment at ratios of 1%-3% increased soil pH by 0.1-1.9 units, decreased leaching ratios of soil Cd 4.0%-22%, and decreased exchangeable and carbonated Cd 42%-55% and 27%-49%, respectively. Organic matter-bound Cd increased 47%-62% (p < 0.05). Cadmium concentrations decreased in the roots, culms, leaves, and grains of rice grown in the Cd-contaminated soils by 37%-81%, 18%-73%, 29%-64% and 27%-63%, respectively, (p < 0.05). Catalase and urease activities increased 2.5%-63% and 3.9%-36%, (p < 0.05), respectively. Applying this compound amendment may significantly mitigate soil acidification and decrease the bioavailability and crop uptake of Cd in acidic Cd-contaminated paddy soils.
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