Abstract：
High mercury (Hg) bioaccumulation in crops such as rice in Hg-contaminated areas presents a potential health hazard to humans and wildlife. To develop a safe alternative technique, bacillus-inoculated biofertilizer, citric acid, earthworms, and selenium-modified activated clay were compared for their ability to regulate Hg bioaccumulation in Pennisetum giganteum (P. giganteum). This biofertilizer significantly increased Bacillus sp. abundance in the soil by 157.12%, resulting in the removal of 27.52% of water-soluble Hg fractions through volatilization and adsorption mechanisms. The variation in bioavailable Hg in the soil significantly reduced the total Hg concentration in P. giganteum young leaves, old leaves, stems, and roots of P. giganteum by 74.14%, 48.08%, 93.72%, and 50.91%, respectively (p < 0.05), which is lower than the Chinese feed safety standard (100 ng g-1). The biofertilizer inhibitory potential was highly consistent with that of the selenium-modified activated clay. Biofertilizers significantly reduced the methylmercury concentration in various P. giganteum tissues (p < 0.05), whereas selenium-modified activated clay failed to achieve a comparable effect. This biofertilizer-assisted planting pattern can achieve an economic income quadruple that of the rice planting pattern in the Hg-contaminated paddy fields. Because of its significant environmental and financial applications, the biofertilizer-assisted planting pattern is expected to replace Hg-contaminated paddy fields.
摘要：
汞污染地区的水稻等作物中汞（Hg）的高生物积累对人类和野生生物具有潜在的健康危害。为了开发一种安全的替代技术，接种芽孢杆菌的生物肥料,柠檬酸,蚯蚓,比较了硒改性的活性粘土在巨大狼尾草中调节Hg生物积累的能力（P。giganteum）。这种生物肥料显着增加了芽孢杆菌。土壤中的丰度增加了157.12%，通过挥发和吸附机制去除27.52%的水溶性汞组分。土壤中生物可利用性Hg的变化显着降低了P.giganteum幼叶中的总Hg浓度，老树叶,茎,和巨大的根74.14%，48.08%,93.72%,50.91%，分别为(p<0.05)，低于中国饲料安全标准(100ngg-1)。生物肥料的抑制潜力与硒改性活性粘土的抑制潜力高度一致。生物肥料显着降低了各种双歧杆菌组织中的甲基汞浓度（p<0.05），而硒改性的活性粘土未能达到相当的效果。这种生物肥料辅助种植模式可以实现汞污染稻田水稻种植模式的经济收入翻两番。由于其重要的环境和金融应用，生物肥料辅助种植模式有望取代汞污染的稻田。
