A method for reducing accumulation of antimony in rice by using exogenous dissolved organic matter

By preparing an exogenous soluble organic matter solution and combining it with flood management, the problem of unstable antimony passivation effect of traditional organic amendments under flood conditions was solved, realizing efficient and long-term antimony control in rice and green restoration of paddy fields.

CN122441744APending Publication Date: 2026-07-24GUILIN UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202610690926.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-19
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Traditional organic amendments in the present technology are difficult to effectively and long-term inhibit antimony absorption by rice under flooded conditions due to molecular structure mismatch and neglect of water synergistic effect, resulting in unstable antimony passivation effect and limited inhibition efficiency.

Method used

Using agricultural waste such as livestock and poultry manure or crop straw as raw materials, an exogenous soluble organic matter solution is prepared. After water extraction, centrifugation and filtration, it is applied to antimony-contaminated paddy fields. Combined with flooding management throughout the entire growth period, it drives the succession of soil microbial communities, promotes iron reduction and root surface iron film formation, and blocks the translocation of antimony to the aboveground parts of rice.

Benefits of technology

It significantly reduced the antimony content in rice grains at maturity, and significantly decreased soil-root bioaccumulation factors and antimony translocation factors, thus achieving green remediation of antimony-polluted paddy fields and safe rice production.

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Abstract

The application discloses a method for reducing rice antimony accumulation by using exogenous soluble organic matter, and relates to the field of agricultural environment remediation, and comprises the following steps: S1, selecting at least one of livestock and poultry manure source organic material or crop straw source organic material as raw material, adding ultrapure water according to a solid-liquid ratio of 1:5-1:20, oscillating and extracting for 12-48 hours under the condition of 15-35 DEG C, taking supernatant by centrifugation, filtering through a 0.45 mu m microporous filter membrane, and obtaining a filter solution as an exogenous soluble organic matter solution; S2, applying the exogenous soluble organic matter solution into antimony-polluted paddy soil, and the application amount of the exogenous soluble organic matter is 0.01%-0.5% of soil dry weight in terms of dissolved organic carbon; and S3, maintaining a waterlogged layer of 1-5 cm in the field during the whole growth period of rice, and draining and drying the field before harvesting. The application realizes green remediation of antimony-polluted paddy fields and safe production of rice by using agricultural waste resource products.
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