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| Screening of garden plants for purifying eutrophic landscape water |
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| DOI：10.16768/j.issn.1004-874X.2017.06.012 |
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| Abstract: |
| Taking 8 species of aquatic plants including Hymenocallis littoralis，Scirpus triqueter，Pontederia
cordata，Iris tectorum，Hydrocotyle vulgaris，Hygrophila salicifolia，Vallisneria natans and Hydrilla verticillata
as the test objects，this essay studied the growth status of these aquatic plants and their effects for the removal of
nutrients like TN，TP and COD in eutrophication garden water by laboratory simulation. The results showed that
H. littoralis，I. tectorum，H. salicifolia and V. natans had good biological growth，while S. triqueter，P. cordata
and H. verticillata decreased and all ydrocotyle vulgaris even died at the end. Eight kinds of aquatic plants had
good nutrient removal effect to some extent，of which H. salicifolia’s removal effect of TN，TP，COD，NH4
+-N
and chroma in the garden water was the best with the removal rates reaching 50.3%，25.4%，38.5%，23.5% and
27.9%， respectively. The removal rates of I. tectorum，H. littoralisof and V. natans for TN was 44%，39.1%，and Taking 8 species of aquatic plants including Hymenocallis littoralis，Scirpus triqueter，Pontederia
cordata，Iris tectorum，Hydrocotyle vulgaris，Hygrophila salicifolia，Vallisneria natans and Hydrilla verticillata
as the test objects，this essay studied the growth status of these aquatic plants and their effects for the removal of
nutrients like TN，TP and COD in eutrophication garden water by laboratory simulation. The results showed that
H. littoralis，I. tectorum，H. salicifolia and V. natans had good biological growth，while S. triqueter，P. cordata
and H. verticillata decreased and all ydrocotyle vulgaris even died at the end. Eight kinds of aquatic plants had
good nutrient removal effect to some extent，of which H. salicifolia’s removal effect of TN，TP，COD，NH4
+-N
and chroma in the garden water was the best with the removal rates reaching 50.3%，25.4%，38.5%，23.5% and
27.9%， respectively. The removal rates of I. tectorum，H. littoralisof and V. natans for TN was 44%，39.1%，and |
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