Patil et al. 2022 — Rice-residue biochar and cadmium bioavailability to Indian mustard

This screen-house study tested rice-residue biochar as an amendment to immobilize cadmium (under combined Cd+Pb spiking) and reduce its uptake by Indian mustard (Brassica juncea). It is upstream agronomic-mitigation mechanism evidence on cadmium soil-to-plant transfer; it reports no retail food occurrence and is context-only for Heavy Metal Index purposes.

Key numbers

• Biochar applied at 0, 0.5, 1, and 2% w/w; soil spiked with Cd (0, 10, 25 mg/kg) and Pb (0, 25, 50 mg/kg) in all combinations.
• Biochar at 2% reduced mean DTPA-extractable Cd in soil by 59% and shoot Cd in mustard by 36% over control.
• Dry-matter yield of mustard rose up to 18% over control at the 1% rate, but fell 19% at the 2% rate.
• Conclusion: rice-residue biochar can ameliorate Cd-contaminated sites, with plant Cd falling as biochar rate rises.

Methods (brief)

Factorial screen-house pot trial; Cd immobilization assessed by DTPA-extractable soil Cd and mustard shoot Cd, with dry-matter yield as an agronomic endpoint.

Implications

Certification: Contributes nothing to HMT&C threshold pools. Agronomic-mitigation mechanism evidence (biochar soil amendment) for cadmium; route as exposure/mechanism context to Soil-to-plant transfer of heavy metals, Cadmium, Lead, and Agronomic mitigation.

Courses: Quantifies the biochar soil-amendment lever (−59% DTPA-Cd, −36% shoot Cd at 2%) and its yield trade-off, supporting the soil-amendment sub-class of agronomic mitigation.

App: No contamination_profile blocks are touched.

Microbiome: Not a focus of this source.

Wiki pages this source may touch

• Cadmium
• Lead
• Soil-to-plant transfer of heavy metals
• Agronomic mitigation

Verification notes

• Evidence tier B: primary screen-house experiment in a peer-reviewed journal.
• Page grounded in the published abstract and bibliographic metadata; values preserved as printed. Full-text extraction can follow on synthesis.
• ingredients: [] / products: [] correct: experimental soil-amendment context, not retail food occurrence; Indian mustard is the test species, carried in matrices.
• Part 2 direction-of-edit check: adds upstream mitigation mechanism literature; neutral to HMT&C thresholds, moves toward the literature.

Page history

The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.