Evaluation of Enrichment and Translocation Effects of Gramineae Ornamental Grasses under Copper and Zinc Combined Stress
The enrichment and transport effects of Gramineae ornamental grasses under the compound pollution of soil with heavy metals copper and zinc were studied,to screen out the tolerant species and analyze their application prospects,and to provide a reference basis for exploring super-enrichment plants and promoting the use of plants to remediate copper and zinc polluted environments.Nine common Gramineae ornamental grasses were used as the test plant materials.To investigate the distribution of copper and zinc in ornamental grasses and to analyze their copper and zinc enrichment and transport characteristics,five stress gradients were set up and the pot control method was used.The results showed that the ability of ornamental grasses to absorb heavy metals copper and zinc differed among species;the ability of different parts to absorb heavy metals copper and zinc also differed significantly,the upper part of the test ornamental grasses absorbed zinc stronger than the lower part of the ground,while the lower part of the ground absorbed copper stronger than the aboveground part.The ability of the test ornamental grasses to enrich and transfer zinc was stronger than that of copper,and zinc enrichment and transfer coefficients were higher than those of copper.By the affiliation function method and Q-type cluster analysis,when the relative distance was 7.5,the test ornamental grasses could be classified into high,medium and low Cu-Zn accumulation types.Eragrostis elliotii and Miscanthus sinensis'Gracillimus'had the strongest overall performance and belonged to the high copper and zinc accumulation type.
Gramineae ornamental grassHeavy metalCopper and zinc combined stressEnrichment and transport effects
万方数据
维普
