Mixing biochar and silicon fertilizer cuts antibiotic resistance in rice paddy soil
Wang M, Li S, Xu H, Huang Q, Wang Z
Soil Health
Rice grown in paddies treated with common soil amendments can carry invisible microbial hitchhikers, and this study shows a simple two-amendment combo actively suppresses the spread of antibiotic-resistant bacteria in the soil beneath your food.
Researchers grew rice in pots for four months, testing whether adding biochar (charred organic matter) and silicon fertilizer together did more good than either alone. The combo boosted the plant's ability to move nutrients like potassium and silicon into its leaves, and also raised the soil's total nitrogen and phosphorus. Most strikingly, it dramatically lowered the presence of antibiotic resistance genes, which can move from soil microbes into the broader environment and eventually reach humans.
Key Findings
The combined biochar and silicon treatment produced the lowest abundance of antibiotic resistance genes and mobile genetic elements among all four tested treatments.
Co-application increased soil total nitrogen and total phosphorus, while promoting translocation of silicon and potassium into rice leaves and altering nitrogen and phosphorus distribution within the plant.
The treatment reshaped the bacterial community, reducing key genera (Dinghuibacter and Roseomonas) linked to antibiotic resistance gene spread and nutrient cycling disruption.
chevron_right Technical Summary
Combining biochar and silicon fertilizer in rice paddies improved crop nutrition and significantly reduced antibiotic resistance genes in the soil, offering a practical dual-benefit soil amendment strategy for safer food production.
Abstract Preview
Original paper
Co-application of biochar and silicon fertilizer enhances rice nutrient allocation, soil fertility, and mitigates ARG dissemination in paddy soil.
The restoration of soils contaminated by antibiotic resistance genes (ARGs) is essential for agricultural safety and human health. Although biochar and silicon (Si) fertilizer have been commonly ap...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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