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Effects of Combined Pollution of Cd,Zn,Pb and Cu on Growth and Absorption Enrichment Responses of Saccharum arundinaceum Retz.
- WANG Tianshun, CHEN Wei, JIANG Wenyan, YANG Yuxia, DUAN Weixing, WANG Haijun, LI Xiaoyu, LIAO Jie, MO Leixing
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2020, 49(5):
97-103.
DOI: 10.15933/j.cnki.1004-3268.2020.05.012
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To provide theoretical basis for the remediation application of Saccharum arundinaceum Retz.in heavy metal combined polluted soil,a pot experiment with cultivated Saccharum arundinaceum Retz.was conducted, and the growth responses, heavy metal accumulation and transfer characteristics of Saccharum arundinaceum Retz.under combined pollution of Cd, Zn, Pb, Cu were observed.With the increasing of soil combined pollution of Cd,Zn,Pb,Cu,the fresh weight in the upper part of Saccharum arundinaceum Retz.gradually decreased,and the maximum decrease rate was 26.71%.The content of Cd,Zn,Pb,Cu in roots,stems and leaves of Saccharum arundinaceum Retz. was obviously increased,the maximum contents of Cd,Zn,Pb,Cu in root were 104.4,2 486.0,379.7,1 457.3 mg/kg,respectively,the maximum contents of Cd,Zn,Pb and Cu in stem were 32.3,1 461.7,77.6,25.3 mg/kg,respectively,and the maximum contents of Cd,Zn,Pb,Cu in leaf were 13. 6,488. 5,21. 7,43. 5 mg/kg,respectively.Except the control,the concentration factors of Cd,Zn,Pb,Cu in stems at the same treatment level were shown as Zn>Cd>Pb>Cu,and Cd>Zn>Cu>Pb in leaves.With the increasing of soil combined pollution of Cd,Zn, Pb, Cu, the translocation factor of Cd, Zn, Pb, Cu in stems gradually decreased, while the translocation factor of Cd and Zn in leaves gradually increased,and the translocation factor of Pb and Cu in leaves increased firstly and then decreased.Overall,Saccharum arundinaceum Retz.has a good ability to absorb and accumulate Cd and Zn,and can be used as a repair plant for Cd and Zn contaminated soil.