| 彭维新,庄玉婷,梁智淇,俞政男,吴道铭,张学平,曾曙才.小叶榕对土壤铅镉污染的抗性和修复潜力研究[J].农业环境科学学报,2021,40(8):1707-1717. |
| 小叶榕对土壤铅镉污染的抗性和修复潜力研究 |
| Resistance and remediation potential of Ficus microcarpa to Pb and Cd pollution in soil |
| 投稿时间：2021-03-01 |
| DOI：10.11654/jaes.2021-0241 |
| 中文关键词: Pb Cd 重金属污染 小叶榕 植物修复 |
| 英文关键词: Pb Cd heavy metal pollution Ficus microcarpa phytoremediation |
| 基金项目:国家自然科学基金项目（31971629，41807112） |
|
| 摘要点击次数: 948 |
| 全文下载次数: 1087 |
| 中文摘要: |
| 采用盆栽试验探讨小叶榕（Ficus microcarpa）对土壤Pb、Cd污染的适应性，并采用熵权TOPSIS模型综合评价其对Pb、Cd污染的修复潜力。结果表明，土壤低含量Pb促进小叶榕生长而高含量Pb抑制小叶榕生长，500 mg·kg-1 Pb处理下，小叶榕地下部和总生物量比对照分别增加28.92%和30.09%，氮、磷、钾吸收量分别增加11.74%、97.59%和61.80%，而1 500 mg·kg-1Pb处理对小叶榕生长发育表现出明显抑制作用。低含量Cd（10 mg·kg-1）对小叶榕生物量和氮、钾元素吸收无明显影响，≥25 mg·kg-1Cd抑制小叶榕生长。复合Pb、Cd污染土壤中，小叶榕对Cd比较敏感，而对Pb表现出较好的耐受性；与Pb1000Cd25处理相比，增加土壤中的Pb含量（Pb1500Cd25）或Cd含量（Pb1000Cd50）仅显著增加小叶榕根部的重金属含量。与Pb1500Cd25处理相比，增加土壤中Cd的含量（Pb1500Cd50）会抑制小叶榕根部对Pb的吸收，但会促进地上部对Pb的吸收。熵权TOPSIS模型评价结果显示，单一Pb、Cd污染中小叶榕生长及养分吸收状况综合评价排序为：Pb500 > Cd10 > CK1 > Pb1000 > Cd25 > Pb1500 > Cd50，即小叶榕在土壤Pb含量为500 mg·kg-1时适应性最好。Pb、Cd复合污染中小叶榕吸收重金属能力综合评价排序为：Pb1500Cd50 > Pb1500Cd25 > Pb1000Cd25 > Pb1000Cd50 > CK2，但Pb1500Cd50、Pb1500Cd25处理小叶榕的生长和养分元素吸收均受到抑制，因此小叶榕适于修复Pb、Cd含量分别低于1 000、25 mg·kg-1的Pb、Cd复合污染土壤。 |
| 英文摘要: |
| This study determined the adaptability of Ficus microcarpa to Pb and Cd polluted soil using a pot experiment. The entropy weight TOPSIS model was used to comprehensively evaluate the remediation potential of Pb and Cd polluted soil. The results showed that the growth of F. microcarpa was promoted in soils with low Pb content, whereas it was inhibited in soils with high Pb content. Compared with the control(CK1), the underground and total biomass of F. microcarpa under the 500 mg·kg-1 Pb treatment was increased by 28.92% and 30.09%, respectively, and the uptake of nitrogen, phosphorus, and potassium was increased by 11.74%, 97.59%, and 61.80%, respectively. The 1 500 mg·kg-1 Pb treatment exhibited a significant inhibitory effect on the growth and development of the plants. The low Cd treatment (10 mg·kg-1) had no significant effect on biomass and the uptake of nitrogen and potassium of F. microcarpa, whereas plant growth was inhibited under the ≥ 25 mg·kg-1 Cd treatment. Ficus microcarpa was sensitive to Cd, but exhibited good tolerance to Pb in Pb and Cd polluted soil. Compared with the Pb1000Cd25 treatment, increasing Pb content(Pb1500Cd25) or Cd content(Pb1000Cd50) in the soil significantly increased the content of heavy metals in the roots of F. microcarpa. Compared with the Pb1500Cd25 treatment, increasing the content of Cd in soil(Pb1500Cd50) inhibited the absorption of Pb in F. microcarpa roots, but promoted the absorption of Pb in the aboveground parts of the plants. An analysis using the entropy weight TOPSIS model indicated that the comprehensive evaluation coefficients of growth and nutrient uptake of F. microcarpa under single Pb or Cd polluted soil were as follows:Pb500 > Cd10 > CK1 > Pb1000 > Cd25 > Pb1500 > Cd50, indicating that F. microcarpa exhibited the best adaptability when the Pb content of soil was 500 mg·kg-1. The comprehensive evaluation coefficients of heavy metal absorption capacity of F. microcarpa under Pb and Cd polluted soil were as follows:Pb1500Cd50 > Pb1500Cd25 > Pb1000Cd25 > Pb1000Cd50 > CK2, but the growth and nutrient absorption of the plants were inhibited under the Pb1500Cd50 and Pb1500Cd25 treatments. Therefore, F. microcarpa can be used to remediate polluted soil with Pb and Cd contents less than 1 000 mg·kg-1 and 25 mg·kg-1, respectively. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
