《Table 2 Correlation (R2) between growth characteristics and purification efficiency of eutrophic wa

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《"Purification of Eutrophic Water by Five Aqua-Cultured Plants in Lake Hongfeng, Guiyang, China"》

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*means correlation is significant at the 0.05 level （2-tailed）

The results presented above indicated that the removal efficiency of eutrophic water was perfect when the biomass production were high and vice versa.Correlation analysis revealed that purification efficiency of eutrophic water correlated significantly，in a positive way，with the biomass amount and plant productivity（Table 2），suggesting that the efficiency of removing nutrients by aqua-cultured plants depended upon the pro-duction of plant biomass，since aqua-cultured plants must grow with large amounts of nutrients.So the higher the biomass production，the more nutrients they can remove.In addition，longer roots can create more favorable conditions for microbial decomposition of organic matter.Therefore，the purification efficiency positively correlated with the biomass production of cultivars.