Overview
This study grew rice to maturity under different fertilization/amendment treatments using Chinese paddy-field soil and measured arsenic species in grain and porewater. It is routeable for rice grain arsenic context and should also be read as a controlled-treatment study rather than a market survey.
Key numbers
Source units are mg/kg for grain arsenic species.
- Grain inorganic arsenic varied from 0.025 to 0.08 mg/kg across control and fertilized treatments.
- Grain DMA varied from 0.08 to 0.16 mg/kg across control and fertilized treatments.
- The sum of grain inorganic arsenic and DMA differed significantly between treatments (P = 0.024).
- The abstract states that fertilizer source did not materially change arsenic speciation concentration in grain.
- Porewater analysis found inorganic arsenic, phosphorus, and manganese decreased as anaerobic conditions developed, while methylated arsenic species increased over time.
Methods
Rice was grown to maturity in growth chambers with standard mineral fertilizer, wood ash, pig slurry, or no amendment. Grain arsenic species and porewater chemistry were monitored alongside soil microbiology.
Implications
The source supports rice-grain arsenic speciation context and helps explain treatment/soil-process drivers. Because this is a controlled chamber study, values should be kept separate from retail-market benchmark pools unless governance admits greenhouse/chamber-grown grain.
Related evidence
Update history
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