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Chinese Journal of Ecology. 2013, (02) Core

Purification efficiency of four combinations of aquatic macrophytes on eutrophic water body in winterChinese Full Text

WANG Xiu-fang1,2**,XU Kai-ping1,YE Sui-gao1,XUE Lin-lin3,LIU Gui-hua2,YOU Ai-ju1,SU Fei1(1Zhejiang Institute of Hydraulics and Estuary,Hangzhou 310020,China;2Key Laboratory of Aquatic Botany and Watershed Ecology,Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,China;3College of Life Sciences,Xiamen University,Xiamen 361005,Fujian,China)

Abstract: Ten species of low temperature-tolerant aquatic macrophytes were chosen to construct four combinations of aquatic macrophytes to study their purification efficiency on eutrophic water body in winter.In non-macrophyte treatment（CK）,the removal efficiency of water total nitrogen（TN）,nitrite nitrogen（NOx-N）,ammonium nitrogen（NH4-N）,and total phosphorus（TP） was 40.0%,25.9%,27.3%,and 64.5%,respectively.Combination 1（Iris hexagonus Hybrid + Rumex japonicas + Acorus gramineus "Ogan" + Juncus inflexus "Blue Arrows"） grew luxuriantly in the test eutrophic water body,and performed best in decreasing water TN,NOx-N,NH4-N,and TP,with the removal efficiency being 47.8%,52.2%,32.4%,and 70.1%,respectively.Combination 2（I.hexagonus Hybrid + R.japonicas + A.gramineus "Ogan" + Hemerocallis middendorfii） could survive and had definite growth amount in the test eutrophic water,and the removal efficiency of water TN,NOx-N,NH4-N,and TP was 44.2%,58.5%,34.6% and 67.8%,respectively.In contrast,both the combination 3（R.japonicas + Lolium perenne + Chlorophytum comosum + Juncus pallidus R.Br."Javelin"） and the combination 4（R.japonicas + L.perenne + C.comosum + Carex tristachya） only had an obvious efficiency in removing NOx-N but less efficiency in removing TN,NH4-N,and TP,due to the poor growth of C.comosum and C.tristachya.It was suggested that combinations 1 and 2 had better purification efficiency on eutrophic water body,being the suitable combination forms of aquatic macrophytes floating-bed under low temperature in winter.
Keywords：

phytoremediation; nitrogen and phosphorus removal; overwintering; floating-bed.;

  • DOI：

    10.13292/j.1000-4890.2013.0145

  • Series：

  • Subject：

  • Classification Code：

    Q948.8

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