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Variation in plant biomass and nitrogen removal in two wetland blocks with species composition

Author

Listed:
  • Hai Wang
  • Cheng-Cai Huang
  • Ying Ge
  • Yi-Wei Mo
  • Si-Xi Zhu
  • Jie Chang

Abstract

The variation in plant biomass and nitrogen (N) removal capacity with species composition was studied in two constructed wetlands. Findings indicated that increased species compositions had a positive influence on plant biomass and a negative effect on the inorganic N concentrations in substrate and substrate solution (effluent). Elevated N concentrations enhanced the effects of species compositions on plant biomass. The Cyperus alternifolius + Arundo donax mixture produced the largest plant biomass and the smallest inorganic N concentrations in substrate. The Cyperus alternifolius + Coix lacryma-jobi + Arundo donax and the Cyperus alternifolius+ Coix lacryma-jobi + Lythrum salicaria + Arundo donax mixtures produced the largest plant biomass under high N condition (146 g N m−2 yr−1). In general, the three- and four-species compositions produced the largest plant biomass and the smallest inorganic N concentrations in substrate and effluent. It suggests that plant mixtures are useful in increasing plant biomass and the wastewater N removal capacity.

Suggested Citation

  • Hai Wang & Cheng-Cai Huang & Ying Ge & Yi-Wei Mo & Si-Xi Zhu & Jie Chang, 2014. "Variation in plant biomass and nitrogen removal in two wetland blocks with species composition," International Journal of Environmental Technology and Management, Inderscience Enterprises Ltd, vol. 17(5), pages 404-417.
    • Handle: RePEc:ids:ijetma:v:17:y:2014:i:5:p:404-417
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