Nutrient enrichment of surface waters degrades water quality. Municipalities need effective and economical solutions to remove nutrients from surface waters. From July 2016 to May 2020, full-scale (900 m², 5% cover) floating treatment wetlands (FTWs) were deployed in Wickham Park pond, a eutrophic water body (0.13 mg/L total phosphorus (P), 0.96 mg/L total nitrogen (N)). The plants in FTWs in close proximity to a SB10000 mixer fixed N and P more efficiently. The rate of N (g/m²/year) fixed within tissues was highest for Juncus effusus (13.5), Agrostis alba (13.2), and Sagittaria lancifolia (12.1). The rate of P (g/m²/year) fixed within plant tissues was similar for all species (3.77, Agrostis alba, Canna spp., Iris hexagona, Juncus effusus, and Sagittaria lancifolia) save Pontederia cordata (2.52) volunteer species (1.41). The N and P removed with plant harvest were similar for non-mixed and mixed FTWs. Notably, the N:P ratio in plant tissues in 2017 (pre-mixer installation) was 11:1; after mixer installation (2018–2020), N:P ratios averaged 2.7:1, indicating increased P fixation within plant tissues. In 2017, 12,828 kg of plant tissues was harvested, removing 334 kg of N and 29.5 kg of P. In 2019, 32,958 kg of plant biomass was harvested from the pond, removing 425 kg of N and 138 kg of P. In 2020, 27,945 kg of biomass was harvested from FTWs, removing 267 kg of N and 95 kg of P. From 2016 to 2020, 73,000 kg of biomass was harvested, removing 1026 kg of N and 262 kg of P from Wickham Park pond. Knowing the total fresh biomass of tissues removed from FTWs at harvest is critical for accuracy in reporting nutrient removal aided by FTWs.

中文翻译：

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佛罗里达雨水塘中全面漂浮处理的湿地中的植物养分吸收：2016–2020年

地表水的营养富集会降低水质。市政当局需要有效且经济的解决方案来去除地表水中的营养。从2016年7月至2020年5月，在富营养化水体Wickham Park池塘（总磷（P）0.13 mg / L，0.96 mg / L）上部署了全尺寸（900 m ²，覆盖率为5％）的漂浮处理湿地（FTW）。 L总氮（N））。紧靠SB10000混合器的FTW中的植物可以更有效地固定N和P。N的速率（克/米²固定的组织内/年）最高的是灯心草（13.5） ，剪股颖属粉（13.2） ，和慈姑lancifolia（12.1）。P的比率（g / m ²/年）固定在植物组织中的所有物种（3.77，白腹姬松鼠，Canna spp。，鸢尾鸢尾，Jun草和人马座）都相似，除了蓬蓬草（2.52）志愿物种（1.41）。对于非混合和混合FTW，随植物收获而去除的氮和磷相似。值得注意的是，2017年（预混合器安装）植物组织中的N：P比为11：1; 安装混合器（2018–2020年）后，N：P比率平均为2.7：1，这表明植物组织内的P固定增加。2017年，收获了12,828千克植物组织，去除了334千克氮和29.5千克磷.2019年，从池塘收获了32,958千克植物生物质，去除了425千克氮和138千克磷.2020年，从FTWs收获了27,945千克生物质，去除了267千克氮和95千克磷。从2016年至2020年，收获了73,000千克生物质，从Wickham Park池塘中去除了1026千克氮和262千克磷。知道收获时从FTW去除的组织的总新鲜生物量对于报告FTW辅助去除营养的准确性至关重要。