| 焦龙进,程剑,姜德民,朱家辉,杨倩,徐双圆,葛鹏,占新华.苏南地区汞污染农田土壤植物套作修复模式的筛选[J].农业环境科学学报,2024,43(3):553-563. |
| 苏南地区汞污染农田土壤植物套作修复模式的筛选 |
| Screening the suitable plant intercropping model for remediation of mercury-contaminated farmland soil in the southern Jiangsu Province area |
| 投稿时间：2023-06-30 |
| DOI：10.11654/jaes.2023-0518 |
| 中文关键词: 植物修复 套作 汞 富集植物 农田土壤 |
| 英文关键词: phytoremediation intercropping mercury hyperaccumulator farmland soil |
| 基金项目:江苏省地质局科研项目（2021KY04） |
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| 摘要点击次数: 347 |
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| 中文摘要: |
| 为探究不同作物-超富集植物套作模式对修复汞污染农田土壤的效果，本研究通过盆栽试验，以小麦、大豆、油菜等作物为研究对象，将其分别与野艾蒿、乳浆大戟、悬钩子等汞富集植物搭配套作，研究不同套种体系修复汞污染农田土壤的效果。结果表明：与富集植物进行套作时，作物根、茎、叶和籽粒的汞含量有不同程度的下降，其中根部汞含量下降最明显，作物与富集植物套作可以降低作物体内汞含量。与小麦单作相比，野艾蒿、悬钩子与小麦套作可以增加小麦地上部生物量，增加幅度分别为49.37%和42.45%。小麦/野艾蒿套作和小麦/悬钩子套作富集植物中汞的转移系数（Transfer factors，TF）接近，但野艾蒿汞的生物富集系数（Bioconcentration factor，BCF）显著高于悬钩子，是其的2.59倍；大豆的两种套作模式下，乳浆大戟的TF、BCF值皆高于野艾蒿，分别是其的1.41倍和1.50倍；油菜的两种套作模式下，悬钩子和野艾蒿的TF值接近。结果分析显示野艾蒿适合与小麦套作，乳浆大戟适合与大豆套作。综上所述，小麦/野艾蒿、大豆/乳浆大戟套作模式可以降低作物体内汞含量，并在一定程度上提高小麦和大豆产量。 |
| 英文摘要: |
| To explore the effects of crops and hyperaccumulators intercropping on remediation of mercury(Hg) contaminated farmland soil with pot experiments, wheat(Triticum aestivum L.), soybean[Glycine max(L.) Merr.] and rape(Brassica napus L.) were used as the subjects, intercropped with the hyperaccumulating plants, wild mugwort(Artemisia lavandulaefolia DC.), leafy spurge(Euphorbia esula L.), and rubus(Rubus corchorifolius L.), to investigate the effects of different interplanting systems on the remediation of Hg-contaminated farmland soil. When intercropping with enriched plants, the Hg concentrations in the roots, stems, leaves, and grains of crops decreased to varying degrees, and the Hg concentrations in the roots had the most pronounced decrease. Intercropping of crops and enriched plants could reduce Hg concentrations in crops. Compared with single cropping of wheat, the intercropping of wild-mugwort/rubus and wheat could increase the aboveground biomass of wheat by 49.37% and 42.45%, respectively. The plant transfer factors(TF) of Hg in enriched plants in wheat/wild mugwort and wheat/rubus were similar. However, the Hg bioconcentration factor(BCF) of wild mugwort was substantially higher than that of rubus, with a ratio of 2.59 times. Under the two intercropping modes of soybean, the TF and BCF values of leafy spurge were higher than those of wild mugwort, with ratios of 1.41 times and 1.50 times, respectively. Under the two intercropping modes of rape, the TF values of rubus and wild mugwort were similar. The results of this study displayed that wild mugwort was suitable for intercropping with wheat, and leafy spurge was suitable for intercropping with soybean. In summary, the intercropping patterns of wheat/wild mugwort and soybean/leafy spurge can reduce Hg concentrations in crops and increase wheat and soybean yield to a certain extent. The results can provide not only a scientific theoretical basis for the sustainable utilization of Hg-contaminated farmland soil in the southern Jiangsu area and the safe production of agricultural products, but also technical support for phytoremediation of Hg-contaminated farmland soil. |
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