比较了12种常用浮岛植物的净水能力，并总结了影响生物浮岛净水能力的影响因素。结果表明：在12种植物中，红叶甜菜（Beta vulgaris var. cicla ）对总氮的去除率最高，可达85.72%；空心菜(Ipomoea aquatica)对总磷的去除率最高，达到95.6%；美人蕉和空心菜对氨氮的去除率均接近100%。在生物浮岛技术应用中，应该根据不同水体、不同季节来选择不同的作物，并且，一般控制浮床的覆盖率在30%左右会达到最佳效果。研究结果为利用生物浮岛进行水体生态修复提供理论依据。

The water purification ability of 12 plants commonly used on floating island are compared, and factors that influence the ability are summarized. The results reveal that red leave beet (Beta vulgaris var cicla) has the highest total nitrogen removal rate amounting to 85.72%, while water spinach (Ipomoea aquatica) keeps the highest total phosphorus removal rate of 95.6%, and water spinach (Ipomoea aquatica) and Canna (Canna indica) both are able to remove nearly all the ammonia nitrogen  in the water. Moreover, the water body and the season should be considered when selecting plants on the floating bed, and a 30% floating bed coverage could help achieve the best effect. The results could provide theoretical basis for applying biological floating island to water ecological restoration.