Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-4952
Title: Nutrient management in aquaponics : comparison of three approaches for cultivating lettuce, mint and mushroom herb
Authors : Nozzi, Valentina
Graber, Andreas
Schmautz, Zala
Mathis, Alex
Junge, Ranka
Published in : Agronomy
Volume(Issue) : 8
Issue : 3
Pages : 27
Publisher / Ed. Institution : MDPI
Issue Date: 7-Mar-2018
License (according to publishing contract) : CC BY 4.0: Attribution 4.0 International
Type of review: Peer review (publication)
Language : English
Subject (DDC) : 630: Agriculture
Abstract: Nutrients that are contained in aquaculture effluent may not supply sufficient levels of nutrients for proper plant development and growth in hydroponics; therefore, they need to be supplemented. To determine the required level of supplementation, three identical aquaponic systems (A, B, and C) and one hydroponic system (D) were stocked with lettuce, mint, and mushroom herbs. The aquaponic systems were stocked with Nile tilapia. System A only received nutrients derived from fish feed; system B received nutrients from fish feed as well as weekly supplements of micronutrients and Fe; system C received the same nutrients as B, with weekly supplements of the macronutrients, P and K; in system D, a hydroponic inorganic solution containing N, Ca, and the same nutrients as system C was added weekly. Lettuce achieved the highest yields in system C, mint in system B, and mushroom herb in systems A and B. The present study demonstrated that the nutritional requirements of the mint and mushroom herb make them suitable for aquaponic farming because they require low levels of supplement addition, and hence little management effort, resulting in minimal cost increases. While the addition of supplements accelerated the lettuce growth (Systems B, C), and even surpassed the growth in hydroponic (System C vs. D), the nutritional quality (polyphenols, nitrate content) was better without supplementation.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Publication type: Article in scientific journal
DOI : 10.21256/zhaw-4952
10.3390/agronomy8030027
ISSN: 2073-4395
URI: https://digitalcollection.zhaw.ch/handle/11475/14110
Appears in Collections:Publikationen Life Sciences und Facility Management

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