| 刘文英,杭晓宁,杨学亭,陈玲,张健,唐荣莉.铁粉与有机质复配钝化材料对水稻各生育期Cd分配的影响[J].农业环境科学学报,2026,45(9):2187-2197. |
| 铁粉与有机质复配钝化材料对水稻各生育期Cd分配的影响 |
| Effects of passivation materials of iron powder and organic matter on Cd distribution in rice at different growth stages |
| 投稿时间：2025-09-28 |
| DOI：10.11654/jaes.2025-0900 |
| 中文关键词: Cd 水稻 钝化修复 Cd吸收 钝化材料 |
| 英文关键词: Cd rice immobilization remediation Cd uptake passivation materials |
| 基金项目:重庆市科研机构绩效激励引导专项（CSTB2024JXJL-YFX0015）；重庆市级财政科技创新类项目（KYLX20240500042） |
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| 中文摘要: |
| 为探究不同含铁钝化材料对水稻吸收与转运Cd的调控作用及机制，本研究采用原位盆栽试验，设置对照（无钝化材料，CK）、2%铁粉、1%牛骨粉+1%铁粉、1%水稻秸秆生物炭+1%铁粉、1%玉米秸秆生物炭+1%铁粉等5个处理，分析了铁粉与有机质复配钝化材料对水稻拔节期、灌浆期及成熟期Cd吸收与分配的影响。结果表明：与CK相比，铁粉与有机质复配钝化材料使水稻成熟期土壤有效态Cd含量降低12.5%~34.8%，土壤可交换态Cd的占比降低7~16个百分点，残渣态Cd的占比增加1~5个百分点；铁粉与有机质复配钝化材料对水稻不同生育期Cd分配的影响存在差异，显著降低了拔节期和灌浆期各部位Cd含量。与CK相比，各处理使拔节期水稻根部和地上部Cd含量分别降低61.4%~78.1%和55.0%~75.0%，灌浆期根、茎和叶Cd含量分别降低15.8%~48.2%、27.7%~77.1%和22.8%~67.3%，成熟期糙米中Cd含量降低36.7%~54.4%。在5个处理中，1%水稻秸秆生物炭+1%铁粉对降低土壤有效态Cd含量和水稻籽粒Cd含量效果最佳。研究表明，复配钝化材料可通过调控土壤Cd有效性、促进根表铁膜形成及改善水稻铁营养状况，有效阻控Cd向水稻籽粒转运。 |
| 英文摘要: |
| To investigate regulative effects and mechanisms of different Fe-containing passivation materials on Cd uptake and translocation of rice in contaminated paddy soil, a situ pot experiment was conducted with five treatments：control（without passivation materials）, 2% iron powder, 1% cow bone meal+1% iron powder, 1% rice straw biochar+1% iron powder, and 1% maize straw biochar+1% iron powder. The effect of iron-organic composite passivation materials on Cd absorption and distribution were analyzed at the jointing, filling, and maturity growth stages of rice. The results showed that compared with CK, the combination of iron powder and organic matter reduced the available Cd content by 12.5%-34.8%, decreased the percentage of exchangeable Cd content by 7-16 percentage points, and increased the percentage of residual Cd content by 1-5 percentage points in soil during the rice maturity stages. Meanwhile, iron powder and organic matter passivation materials had varying effects on Cd uptake at different growth stages of rice. It significantly reduced the Cd content during the jointing and filling stages of rice. Compared to the CK, it reduced the Cd content in the roots and aboveground parts during the jointing stage by 61.4%-78.1% and 55.0%-75.0%, respectively. During the filling stage, the Cd content in roots, stems, and leaves were reduced by 15.8% - 48.2%, 27.7% - 77.1% and 22.8% - 67.3%, respectively. At the maturity stages, the Cd content in brown rice was reduced by 36.7%-54.4%. Among the five treatments, the treatment of 1% rice straw biochar+1% iron powder showed the best effect in reducing soil available Cd and the content of Cd in edible parts of rice. In summary, iron-organic composite passivation materials reduced the availability of soil Cd, promoted the formation of iron plaque on root surface, and improved the iron nutrition status of rice, effectively preventing and controlling the transport of Cd to rice grains. |
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