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EFFECTS OF VEGETATION PATTERN AND SPONTANEOUS SUCCESSION ON REMEDIATION OF POTENTIAL TOXIC METAL-POLLUTED SOIL IN MINE DUMPS
Chen, F., Y. Yang, J. Mi, R. Liu, H. Hou and S. Zhang.
Sustainability 11(2):397(2019)

Plant growth, soil fertility, and the capacity of potential toxic metals (PTMs) using different vegetation patterns were investigated over 10 and 17 years to understand the role of vegetation pattern and spontaneous succession in the early phase of mine restoration projects. To do this, field and lab experiments on different vegetative patterns were conducted using combinations of rehabilitative plants (RP) and local plants (LP) at a metal mining dump in Sichuan, China. Phytoremediation using a simple vegetation pattern of RPs Agave sisalana and Neyraudia reynaudiana achieved a PTM pollution index of 9.28% lower, a soil fertility index of 21.86% lower, and biodiversity index of 73.69% lower than a complex vegetative pattern using RPs and LPs. Phytoremediation with a 10-year RP and LP pattern had a PTM pollution index 4.04% higher, a soil fertility index 4.48% lower, and a biodiversity index 12.49% lower than the 17-year RP and LP pattern. Results indicate the importance of choosing a suitable vegetation pattern to prevent spontaneous vegetation succession and ensure phytoremediation. This article is Open Access at https://www.mdpi.com/2071-1050/11/2/397/htm.



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