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| Effects of Medicinal Herb Residue Combined with Nitrogen and Phosphorus Fertilizers on Plant Growth and Physico-chemical Properties of a Pb/Zn Mine Tailings |
| Received:July 06, 2015 |
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| KeyWord:Pb/Zn mine tailing;restoration;medicinal herb residue;nitrogen fertilizer;phosphorus fertilizer |
| Author Name | Affiliation | E-mail | | LI Feng-mei | College of Bio-resources and Environmental Science, Hunan Provincial Engineering Laboratory of Control and Remediation of Heavy Metal Pollution from Mn-Zn Mining and the Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology(the 2011 Plan of Hunan Province), Jishou University, Jishou 416000, China | | | YANG Sheng-xiang | College of Bio-resources and Environmental Science, Hunan Provincial Engineering Laboratory of Control and Remediation of Heavy Metal Pollution from Mn-Zn Mining and the Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology(the 2011 Plan of Hunan Province), Jishou University, Jishou 416000, China | yangsx1998@163.com | | PENG Xi-zhu | College of Bio-resources and Environmental Science, Hunan Provincial Engineering Laboratory of Control and Remediation of Heavy Metal Pollution from Mn-Zn Mining and the Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology(the 2011 Plan of Hunan Province), Jishou University, Jishou 416000, China | | | ZHANG Xiao-jun | College of Bio-resources and Environmental Science, Hunan Provincial Engineering Laboratory of Control and Remediation of Heavy Metal Pollution from Mn-Zn Mining and the Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology(the 2011 Plan of Hunan Province), Jishou University, Jishou 416000, China | | | PENG Qing-jing | College of Bio-resources and Environmental Science, Hunan Provincial Engineering Laboratory of Control and Remediation of Heavy Metal Pollution from Mn-Zn Mining and the Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology(the 2011 Plan of Hunan Province), Jishou University, Jishou 416000, China | |
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| Abstract: |
| Medicinal herb residue(MHR) is a waste material after making traditional Chinese medicine. Here we explored its potential to rehabilitate Pb/Zn mine tailings in a pot experiment. Plant growth and physico-chemical properties of a Pb/Zn mine tailings were evaluated after applying medicinal herb residue in combination with nitrogen and phosphorus fertilizers. Results showed that adding medicinal herb residue in combination with nitrogen and phosphorus fertilizers decreased concentrations of diethylene-triamine-pentaacetic acid(DTPA)-extractable Cd, Cu, Pb and Zn in the mine tailings, but increased content of organic matter, ammonium-N and available P and enhanced enzyme(dehydrogenase, β-glucosidase, urease and phosphatase) activities in the tailings. The metal concentrations in plant tissues were reduced by addition of medicinal herb residue. These effects were greater in all treatments with MHR than that without MHR. Canonical correspondence analysis(CCA) revealed that all the treatments were clustered into three groups based on the variation in physico-chemical properties of the mine tailings. The position of CK on the negative part of the Axis 1 indicated a positively correlation with the extractable metal concentrations. In contrast, the treatments of MHR, MHR+N, MHR+P and MHR+N+P were all positioned in the positive part of the Axis 1, suggesting higher organic matter, ammonium-N, available P and soil enzyme activities. In conclusion, our results showed that the application of medicinal herb residues together with nitrogen and/or phosphorus fertilizers should be a practical method to reduce metal bioavailability, increase soil nutrients, and enhance enzyme activities, thereby facilitating ecological restoration of mine tailings. |
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