CO2升高对三角梅吸收Cd和佳乐麝香及根际的影响

以花卉三角梅修复Cd和佳乐麝香污染土壤为研究对象，探讨大气CO₂浓度升高对该植物吸收Cd和佳乐麝香的影响，并通过检测植物根际各相关指标综合分析三角梅修复生态系统的整体功能.结果表明，CO₂浓度升高、Cd和佳乐麝香的联合胁迫对三角梅生长没有显著抑制，对其吸收Cd和佳乐麝香具有促进作用，尤其是750μL/LCO₂、50mg/kg Cd和佳乐麝香处理促进作用最显著，并且，此时三角梅根际细菌的数量最多.脲酶活性随不同处理组浓度变化存在显著性差异.佳乐麝香的添加和CO₂浓度升高促进了土壤有机碳的增加.综上，三角梅具有应用于大气CO₂浓度升高条件下修复Cd和佳乐麝香复合污染土壤的潜力.

The effects of elevated CO2 on Cd and HHCB accumulation by Bougainvillea spectabilis and its rhizosphere system

The study selected the ornamental plant remediation system as the study object, discussed the effects of the elevated CO₂ on the Cd and HHCB accumulation efficiency by Bougainvillea spectabilis, and analysed the ecological function by detecting the rhizosphere bacteria number, enzymatic activity, and organic carbon. Results showed that the combined Cd and HHCB contamination under elevated CO₂ showed no obvious inhibition function to the growth of the plant. Especially the elevated CO₂ treatments (750μL/L) significantly facilitated the plant growth and contaminant accumulation, furthermore, the rhizosphere bacteria number reached the maximum. Urea enzymes activity showed significant difference under the different treatments. The addition of HHCB and the elevated CO₂ facilitated the organic carbon in the rhizospheric soil. In summary, Bougainvillea spectabilis has potential to be used for remediating the combined Cd and HHCB contaminated soil remediation under elevated CO₂.