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首页> 外文期刊>Journal of Environmental Management >Harnessing sediments of coastal aquaculture ponds through technosols construction for halophyte cultivation using saline water irrigation
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Harnessing sediments of coastal aquaculture ponds through technosols construction for halophyte cultivation using saline water irrigation

机译：通过使用盐水灌溉的盐生植物栽培技术溶胶来治理沿海水产养殖池塘的沉积物

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The Mediterranean aquaculture has been developed mostly in brackish environment in inactive coastal salt production areas. This study aims to utilise Technosols made with aquaculture sediments for Limonium algarvense Erben cultivation. This species that has nutraceutical potential thrives in halophilic environments in the southwest of the Iberian Peninsula and in Morocco. A microcosm assay was set up with plants grown in bottom sediments (C~+), commercial substrate (C~-), and Technosols with amendments mixture application at 180 gAg (Tec180) or at 360 g/kg (Tec360). These plants were irrigated with saline (assay 1) and/or with deionised water (assay 2). The bottom pond sediments, coffee wastes and the estuarine water were evaluated for diverse phys-icochemical parameters. Plant growth was characterised through a combined methodology using morphometric, SEM and physiological analysis. The Technosols were constructed with bottom sediments and a mixture of organic wastes used as amendments. Results revealed that the bottom sediments had low pH 3.2, C_(org) and extractable P and K contents, and high electroconductivity (EC) and N-NH_4 concentration. The estuarine water had a neutral pH, high EC and high C1~-, HCO_3~-, Na~+, Mg~(2+) and Ca~(2+) but low N-NO_3 content. The Technosols showed a significant increase of pH, C_(org), K and P and a decrease in N-NH_4 and EC in comparison with sediments. Principal component analysis separated the different experiments in three groups: C~-, A1 and A2 assays. The C~ was highly correlated with C_(org), P, K, N-NO_3 parameters and total ascorbate. The A1 assay showed a strong association with Na, Ca and EC parameters, whereas the A2 assay presented a strongly correlation with plant growth. Plants from Technosols had greater development when irrigated with deionised water than under salty irrigation as opposed to plants cultivated in unamend sediments. In conclusion, these results support that highly saline sediments could be valorised through Technosols construction to cultivate plants with saline water, with potential application in the agro-food and pharmaceutical industry.
机译：地中海水产养殖业大多是在不活跃的沿海盐产区咸淡的环境中发展的。这项研究旨在利用由水产养殖沉积物制成的Technosols进行Algarvense Erben的种植。这种具有保健潜力的物种在伊比利亚半岛西南部和摩洛哥的嗜盐环境中environments壮成长。建立了一个缩影测定法，将生长在底部沉积物（C〜+），商业基质（C〜-）和Technosols中的植物与添加180 gAg（Tec180）或360 g / kg（Tec360）的混合物混合使用。这些植物用盐水（方法1）和/或去离子水（方法2）灌溉。评估了底部池塘的沉积物，咖啡废料和河口水的各种物理化学参数。通过使用形态计量学，SEM和生理分析的组合方法对植物的生长进行了表征。这些Technosols的底部沉积物和有机废物的混合物被用作改良剂。结果表明，底部沉积物的pH值为3.2，C_（org）低，可提取的P和K含量较高，电导率（EC）和N-NH_4浓度较高。河口水具有中性pH，高EC和高C1〜-，HCO_3〜-，Na〜+，Mg〜（2+）和Ca〜（2+），但N-NO_3含量较低。与沉积物相比，Technosols的pH，C_（org），K和P显着增加，而N-NH_4和EC则显着下降。主成分分析将不同的实验分为三组：C〜-，A1和A2分析。 C〜与C_（org），P，K，N-NO_3参数和总抗坏血酸高度相关。 A1分析显示与Na，Ca和EC参数密切相关，而A2分析显示与植物生长密切相关。与用咸水灌溉的植物相比，用去离子水灌溉的Technosols的植物具有更大的发展，这与在未改良的沉积物中种植的植物相反。总之，这些结果支持可以通过Technosols建设利用盐水来种植高盐分的沉积物，并在农业食品和制药行业中潜在应用。

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