五种沉水植物对富营养化水体的净化效果

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Abstract

In order to purify the freshwater of eutrophication,submerged plants were used to decrease the nutrient concentrations and phytoplankton.In this study,five common submerged plants in Yangtze River Basin were transplanted to algae-based water in summer. The capacity of eliminating total nitrogen and phosphorus concentrations and decreasing phytoplankton was observed and compared. Results showed that the removal rate of total nitrogen concentration was in the order of Potamogeton malaianus>Hydrilla verticillata>Vallisneria natans>Potamogeton maackianus>Potamogeton crispus.While the removal rate of total phosphorus was listed as P.malaianus>H.verticillata>P.maackianus>V.natans>P.crispus.In addition,P.malaianus had the best effect on controlling the total amount of algae;while V.natans,P.maackianus and P.crispus had less effect on controlling the total amount of algae.H. verticillata could significantly remove the total phosphorus and phytoplankton(p≤0.01),but it had no obvious effect on the absorption of total nitrogen in water(p=0.209).Based on the absorption rate of total nitrogen and phosphorus concentrations,as well as removal rate of algae,it can be seen that P.malaianus can grow well and have a stable effect on water purification during the whole experimental period.So it can be considered as a potential plant species to purify small eutrophic water in summer.

Key words： ubmerged plants eutrophication nutrient phytoplankton

Received: 25 December 2011

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	Articles by authors
	LIU Hui
	ZHU Dan-ting
	LI Ming-hong
	QIAO Ning-ning

Cite this article:

LIU Hui,ZHU Dan-ting,LI Ming-hong, et al. Effects of five submerged macrophytes on the purification of eutrophication water[J]. , 2011, 30(6): 596-601.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2011/V30/I6/596

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