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Publication Type J
Authors Custodio, M., P. Cartaxana, S. Villasante, R. Calado and A. I. Lillebo
Title LED Lighting and High-Density Planting Enhance the Cost-Efficiency of Halimione Portulacoides Extraction Units for Integrated Aquaculture
Source Applied Sciences-Basel
Author Keywords sea purslane hydroponics aquaponics light-emitting diodes sustainable aquaculture nature-based solutions saline farming artificial-light polar lipidome growth quality lettuce blue red photosynthesis halophytes biomass
Abstract Halophytes are salt-tolerant plants that can be used to extract dissolved inorganic nutrients from saline aquaculture effluents under a production framework commonly known as Integrated Multi-Trophic Aquaculture (IMTA). Halimione portulacoides (L.) Aellen (common name: sea purslane) is an edible saltmarsh halophyte traditionally consumed by humans living near coastal wetlands and is considered a promising extractive species for IMTA. To better understand its potential for IMTA applications, the present study investigates how artificial lighting and plant density affect its productivity and capacity to extract nitrogen and phosphorous in hydroponic conditions that mimic aquaculture effluents. Plant growth was unaffected by the type of artificial lighting employed-white fluorescent lights vs. blue-white LEDs-but LED systems were more energy-efficient, with a 17% reduction in light energy costs. Considering planting density, high-density units of 220 plants m(-2) produced more biomass per unit of area (54.0-56.6 g m(-2) day(-1)) than did low-density units (110 plants m(-2); 34.4-37.1 g m(-2) day(-1)) and extracted more dissolved inorganic nitrogen and phosphorus. Overall, H. portulacoides can be easily cultivated hydroponically using nutrient-rich saline effluents, where LEDs can be employed as an alternative to fluorescent lighting and high-density planting can promote higher yields and extraction efficiencies.
Author Address [Custodio, Marco; Cartaxana, Paulo; Calado, Ricardo; Lillebo, Ana Isabel] Univ Aveiro, ECOMARE, P-3810193 Aveiro, Portugal. [Custodio, Marco; Cartaxana, Paulo; Calado, Ricardo; Lillebo, Ana Isabel] Univ Aveiro, Dept Biol, Ctr Environm & Marine Studies CESAM, P-3810193 Aveiro, Portugal. [Custodio, Marco] Flanders Marine Inst, Wandelaarkaai 7, B-8400 Oostende, Belgium. [Villasante, Sebastian] Univ Santiago Compostela, Dept Appl Econ, Santiago De Compostela 15705, Spain. [Villasante, Sebastian] Univ Santiago Compostela, Cross Res Environm Technol CRETUS, Campus Sur, Santiago De Compostela 15705, Spain. [Villasante, Sebastian] Campus Univ Vigo, Campus Mar,Int Campus Excellence, Vigo 36310, Spain. Custodio, M; Lillebo, AI (corresponding author), Univ Aveiro, ECOMARE, P-3810193 Aveiro, Portugal.; Custodio, M; Lillebo, AI (corresponding author), Univ Aveiro, Dept Biol, Ctr Environm & Marine Studies CESAM, P-3810193 Aveiro, Portugal.; Custodio, M (corresponding author), Flanders Marine Inst, Wandelaarkaai 7, B-8400 Oostende, Belgium. marco.custodio@vliz.be; pcartaxana@ua.pt; sebastian.villasante@usc.es; rjcalado@ua.pt; lillebo@ua.pt
29-Character Source Abbreviation Appl. Sci.-Basel
Publication Date Jun
Year Published 2021
Volume 11
Issue 11
Digital Object Identifier (DOI) 10.3390/app11114995
Unique Article Identifier WOS:000659647700001

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