Journal of Ecology and Rural Environment ›› 2017, Vol. 33 ›› Issue (11): 1023-1028.doi: 10.11934/j.issn.1673-4831.2017.11.009

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Effect of Suaeda glauca Purifying Seawater From Marinelands Varying in Eutrophication Degree

CHANG Ya-jun, ZHANG Ya, LIU Xiao-jing, LI Nai-wei, DU Feng-feng, YAO Dong-rui   

  1. Jiangsu Key Laboratory for Bioresouces of Saline Soils/Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
  • Received:2017-02-23 Online:2017-11-25 Published:2017-11-24

Abstract:

To search for a practical economical phytoremediation strategy for remediation of hyper-eutrophied sea water discharged from marinelands in the areas of costal tidal flats in China, an in-lab simulated aqucultural experiment was conducted on biomass production and nutrient removal efficiency of Suaeda glauca in eutrophied sea water. Results show that the plant growing in the hyper-eutrophied water with TN and TP reaching 2.4 and 0.05 mmol·L-1, respectively, turned out the highest biomass, either dry or fresh, or significantly higher than those growing in moderately eutrophied water with TN and TP reaching 1.6 and 0.03 mmol·L-1, respectively or low-eutrophied water with TN and TP reaching 0.8 and 0.01 mmol·L-1, respectively during the experiment. TN and TP removal efficiency of the plant reached 73.2% and 74.4%, separately, and declined with rising TN and TP concentrations in the eutrophied water. In addition, biomass, N and P contents and accumulation of all organs of Suaeda glauca were analyzed, with results suggesting that Suaeda glauca as a pioneer annual species in coastal tidal flats could be used to remedy hyper-eutrophied sea water as tail water from marinelands.

Key words: Suaeda glauca, aquacultural tail water, hypereutrophic, purification effect

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