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首页> 外文期刊>Water Research >Bioremediation efficiency in the removal of dissolved inorganic nutrients by the red seaweed, Porphyra yezoensis, cultivated in the open sea
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Bioremediation efficiency in the removal of dissolved inorganic nutrients by the red seaweed, Porphyra yezoensis, cultivated in the open sea

机译：在公海养殖的紫菜紫菜中去除溶解的无机养分的生物修复效率

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The bioremediation capability and efficiency of large-scale Porphyra cultivation in the removal of inorganic nitrogen and phosphorus from open sea area were studied. The study took place in 2002-2004, in a 300 ha nori farm along the Lusi coast, Qidong County, Jiangsu Province, China, where the valuable rhodophyte seaweed Porphyra yezoensis has been extensively cultivated. Nutrient concentrations were significantly reduced by the seaweed cultivation. During the non-cultivation period of P. yezoensis, the concentrations of NH_4-N, NO_2-N, NO_3-N and PO_4-P were 43-61, 1-3, 33-44 and 1-3μmolL~(-1), respectively. Within the Porphyra cultivation area, the average nutrient concentrations during the Porphyra cultivation season were 20.5, 1.1, 27.9 and 0.96nmolL~(-1) for NH_4-N, NO_2-N, NO_3-N and PO_4-P, respectively, significantly lower than in the non-cultivation season (p<0.05). Compared with the control area, Porphyra farming resulted in the reduction of NH_4-N, NO_2-N, NO_3-N and PO_4-P by 50-94%, 42-91%, 21-38% and 42-67%, respectively. Nitrogen and phosphorus contents in dry Porphyra thalli harvested from the Lusi coast averaged 6.3% and 1.0%, respectively. There were significant monthly variations in tissue nitrogen content (p<0.05) but not in tissue phosphorus content (p>0.05). The highest tissue nitrogen content, 7.65% in dry wt, was found in December and the lowest value, 4.85%, in dry wt, in April. The annual biomass production of P. yezoensis was about 800 kg dry wtha~(-1) at the Lusi Coast in 2003-2004. An average of 14708.5 kg of tissue nitrogen and 2373.5 kg of tissue phosphorus in P. yezoensis biomass were harvested annually from 300 ha of cultivation from Lusi coastal water. These results indicated that Porphyra efficiently removed excess nutrient from nearshore eutrophic coastal areas. Therefore, large-scale cultivation of P. yezoensis could alleviate eutrophication in coastal waters economically.
机译：研究了大型紫菜栽培技术对公海去除无机氮和磷的生物修复能力和效率。这项研究于2002年至2004年期间，在中国江苏省启东县卢斯海岸沿岸300公顷的紫菜农场中进行，广泛种植了珍贵的红藻海藻紫菜。紫菜栽培可显着降低养分含量。紫叶非培养期NH_4-N，NO_2-N，NO_3-N和PO_4-P的浓度分别为43-61、1-3、33-44和1-3μmol·L〜（-1） ， 分别。在紫菜栽培区域内，紫菜栽培季节的NH_4-N，NO_2-N，NO_3-N和PO_4-P的平均养分浓度分别为20.5、1.1、27.9和0.96nmolL〜（-1），显着降低与非耕种季节相比（p <0.05）。与控制区相比，紫菜养殖分别减少了NH_4-N，NO_2-N，NO_3-N和PO_4-P的50-94％，42-91％，21-38％和42-67％ 。从卢西海岸收获的干燥紫菜中的氮和磷含量分别平均为6.3％和1.0％。组织氮含量（p <0.05）每月显着变化（P> 0.05），组织磷含量无明显变化（p> 0.05）。在12月发现最高组织氮含量，以干重计为7.65％，在4月发现最低值，以干重计为4.85％。 2003-2004年鲁西海岸紫斑狼疮年生物量产量约为800 kg干wtha〜（-1）。每年从鲁西沿海水域种植的300公顷大豆中平均获得yezoensis P. yezoensis生物量中的14708.5 kg组织氮和2373.5 kg组织磷。这些结果表明紫菜有效地去除了近岸富营养化沿海地区的过量养分。因此，大规模种植斑节对虾可以经济地减轻沿海水域的富营养化。

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