Pedosphere 22(5): 631--639, 2012
ISSN 1002-0160/CN 32-1315/P
©2012 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Growth,Cadmium and Zinc Accumulation of Ornamental Sunflower(Helianthus annuus L.)in Contaminated Soil with Different Amendments |
HAO Xiu-Zhen,  ' target='_blank'>ZHOU Dong-Mei, LI Dan-Dan, JIANG Ping |
| Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
| ABSTRACT |
| Use of ornamental plants for phytoremediation of metal-contaminated soil is a new option.A pot experiment was carried out to assess the effect of application of amendments,i.e.,swine manure,salicylic acid(SA)and potassium chloride(KCl),on the growth, uptake and translocation of cadmium(Cd)and zinc(Zn)of ornamental sunflower(Helianthus annuus L.)grown on a contaminated soil.The three amendments increased sunflower height,flower diameter,and biomass.Manure significantly decreased Cd and Zn concentrations in sunflower,and thus decreased the bioaccumulation coeffcient(BCF)of Cd and Zn.However,using of KCl markedly increased Cd concentrations in sunflower and the BCF of Cd.Additionally,both swine manure and KCl application increased Cd and Zn translocation from root to aboveground part.Swine manure and salicylic acid reduced the Cd/Zn ratios in flower of sunflower,while KCl significantly increased the Cd/Zn ratios.Correlation analysis demonstrated that the Cd/Zn ratio in the root of sunflower was affected by K/Na ratio in root and soil available potassium(K)concentration.Ornamental sunflower could be grown as an alternative plant in the Cdand Zncontaminated soil with KCl application to get the balance between environmental and economic interests. |
| Key Words: Cd/Zn ratio,fertilizer,heavy metals,manure,remediation |
| Citation: Hao, X. Z., Zhou, D. M., Li, D. D. and Jiang, P. 2012. Growth,Cadmium and Zinc Accumulation of Ornamental Sunflower(Helianthus annuus L.)in Contaminated Soil with Different Amendments. Pedosphere. 22(5): 631-639. |
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