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Publication Type J
Authors Custodio, M., S. Villasante, R. Calado and A. I. Lillebo
Title Testing the hydroponic performance of the edible halophyte Halimione portulacoides, a potential extractive species for coastal Integrated Multi-Trophic Aquaculture
Source Science of the Total Environment
Author Keywords Sustainable aquaculture Hydroponics Halophytes Nutrients Plant nutrition Remediation
Abstract Sea purslane Halimione portulacoides (L.) Aellen is a candidate extractive species for coastal Integrated Multi-Trophic Aquaculture (IMTA) to recycle the dissolved inorganic nitrogen (DIN) and phosphorus (DIP) wasted by excretive species. To test its suitability, saline aquaculture effluents were simulated in the laboratory using a hydroponics approach to cultivate the plants. Nutrient extraction efficiency, growth performance and nutritional profile were assessed under a range of DIN and DIP concentrations representing three different aquaculture intensification regimes and using Hoagland's solution as a control. Over a 10-week period, hydroponic units under non-limited N and P conditions displayed daily extraction rates between 1.5 and 2.8 mg DIN-N L-1 day(-1) and 0.1-02 mg DIP-P L-1 day(-1) and yielded between 63.0 and 73.0 g m(-2) day(-1) of H. portulacoides biomass. Relatively to biomass produced, H. portulacoides extracted between 2.6 and 42 mg DIN-N g(-1), and 0.1-0.4 mg DIP-P g(-1). The treatment with low-input of DIN and DIP (6.4 mg N L-1 and 0.7 mg P L-1) induced some degree of nutrient limitation, as suggested by the extremely high extraction efficiencies of DIN extraction (99%) in parallel with lower productivity. The nutritional profile of H. portufacoides leaves is comparable to that of other edible halophytes and leafy greens and could be a low-sodium alternative to salt in its lyophilized form. From the present study, we conclude that the edible halophyte H. portufacoides can be highly productive in hydroponics using saline water irrigation with non-limiting concentrations of DIN and DIP and is, therefore, a suitable extractive species for coastal IMTA in brackish waters. (C) 2020 Elsevier B.V. All rights reserved.
Author Address [Custodio, Marco; Calado, Ricardo; Lillebo, Ana, I] Univ Aveiro, ECOMARE, Dept Biol, Aveiro, Portugal. [Custodio, Marco; Calado, Ricardo; Lillebo, Ana, I] Univ Aveiro, Ctr Environm & Marine Studies CESAM, Dept Biol, Aveiro, Portugal. [Villasante, Sebastian] Univ Santiago de Compostela, Dept Appl Econ, Santiago De Compostela, Spain. Custodio, M; Lillebo, AI (corresponding author), Univ Aveiro, ECOMARE, Dept Biol, Aveiro, Portugal.; Custodio, M; Lillebo, AI (corresponding author), Univ Aveiro, Ctr Environm & Marine Studies CESAM, Dept Biol, Aveiro, Portugal. mfc@ua.pt; lillebo@ua.pt
ISSN 0048-9697
ISBN 0048-9697
29-Character Source Abbreviation Sci. Total Environ.
Publication Date Apr
Year Published 2021
Volume 766
Digital Object Identifier (DOI) 10.1016/j.scitotenv.2020.144378
Unique Article Identifier WOS:000617676800089

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