Journal of Biology ›› 2022, Vol. 39 ›› Issue (5): 72-.doi: 10.3969/j.issn.2095-1736.2022.05.077

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Accumlation of heavy metal between Lepisanthes rubiginosa and Sauropus androgynus in lead-zinc mining area #br# #br#

  

  1. 1. College of Ecology and Environment, Hainan University, Haikou 570228, China;
    2. College of Tropical Crops, Hainan University, Haikou 570228, China
  • Online:2022-10-18 Published:2022-10-18

Abstract: In order to study the heavy metal enrichment capacity of two large biomass woody plants, Lepisanthes rubiginosa and Sauropus androgynus, they are planted in Changhua lead-zinc mine. The results showed as follows: the biomass of L. rubiginosa was 2.198 /hm2, and that of S. androgynus was 9.273 t/hm2. The contents of Cd, Pb, Cu and Zn in leaves of L. rubiginosa were higher than those in roots and stems. Under the same planting time, a total of Cd 6.64 g, Pb 22.76 g, Cu 12.72 g and Zn 542.23 g could be extracted from each hectare of soil by L. rubiginosa. S. androgynus could extracte Cd 306.28 g,Pb 92.82 g,Cu 63.02 g and Zn 12795.64 g Zn from each hectare of soil. Except that the enrichment factors of Pb and Cu in the stems and leaves of S. androgynus were lower than that of L. rubiginosa, the other enrichment coefficients were higher than that of L. rubiginosa. They can effectively adsorb these two heavy metals and transfer to their aboveground parts.

Key words: Lepisanthes rubiginosa, Sauropus androgynus, heavy metal of soil, bioconcentration factor, biotranslocation factor

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