Abstract
From the late autumn to the early winter, several macrophytes were introduced to our newly constructed enclosures in a eutrophic lake. The purification and ecological restoration were investigated during the declining season of most macrophytes. The results show several macrophytes could be introduced to this eutrophic lake by physico ecological engineering technique. Moreover, the newly introduced macrophytes could increase the transparency, improve water quality and remediate the eutrophic ecosystem. After three weeks, the transparency increases two time as much as original level in the enclosure with macrophytes. Comparing with control enclosure and open water, TN concentration decreased by 43.7% and 59.4% after three weeks,61.6% and 79.7% after six weeks, respectively; and TP concentration decreased by 50.3% and 57.0% after three weeks.
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