Abstract The present study was conducted to investigate the potential of the emergent macrophytes Phragmites australis to remediate nutrients and restore an eutrophic wetland (Lake Burullus, Egypt). The plant was sampled monthly for one year from 6 sites distributed equally along the northern and southern parts of this lake. Monthly significant variation in all investigated sediment and water nutrients for the northern and southern sites was recorded. The biomass of P. australis in the southern sites was greater than that of the northern sites; in addition, the above-ground biomass was greater than the below-ground biomass. The above-ground biomass increased from February until it reached its maximum during August and then decreased again. Likewise, the highest nutrient concentrations in the different tissues were recorded at the beginning of the growing season during winter and early spring and then gradually decreased with increasing plant biomass. Moreover, the nutrient content (g/m2) increased from the early growing season (February) and reached its peak during April–August and then decreased. Based on our results, P. australis could be used for the extraction of nutrients to reduce the eutrophication in Lake Burullus, if the above-ground biomass is harvested at its maximum value in August, as was the case regarding the maximum content of most nutrients.

中文翻译：

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芦苇去除养分以消除埃及布鲁勒斯湖富营养化的季节性潜力

摘要 本研究旨在调查新出现的芦苇在修复养分和恢复富营养化湿地（埃及布鲁勒斯湖）方面的潜力。在一年中，该植物每月从沿该湖北部和南部平均分布的 6 个地点取样。记录了北部和南部地点所有调查的沉积物和水养分的每月显着变化。南部站点的P. australis生物量大于北部站点；此外，地上生物量大于地下生物量。地上生物量从 2 月份开始增加，直到 8 月份达到最大值，然后再次下降。同样地，在冬季和早春的生长季节开始时记录到不同组织中的最高养分浓度，然后随着植物生物量的增加而逐渐降低。此外，养分含量（g/m2）从生长初期（2 月）开始增加，并在 4-8 月达到峰值，然后下降。根据我们的研究结果，如果地上部生物量在 8 月份以最大值收获，就像大多数营养物质的最大含量一样，P. australis 可用于提取营养物质以减少布鲁勒斯湖的富营养化. 养分含量（g/m2）从生长初期（2月）开始增加，4-8月达到高峰，然后下降。根据我们的研究结果，如果地上部生物量在 8 月份以最大值收获，就像大多数营养物质的最大含量一样，P. australis 可用于提取营养物质以减少布鲁勒斯湖的富营养化. 养分含量（g/m2）从生长初期（2月）开始增加，4-8月达到高峰，然后下降。根据我们的研究结果，如果地上部生物量在 8 月份以最大值收获，就像大多数营养物质的最大含量一样，P. australis 可用于提取营养物质以减少布鲁勒斯湖的富营养化.