ID 7312
File
Authors
Kaburagi, Emi Faculty of Agriculture, Tottori University Researchers DB
Yamada, Mina Faculty of Agriculture, Tottori University
Baba, Takashi Faculty of Agriculture, Tottori University
Fujiyama, Hideyasu The National University Corporation Arid Land Research Center, Tottori University KAKEN
Murillo-Amador, Bernardo Centro de Investigaciones Biologicas del Noroeste
Yamada, Satoshi Faculty of Agriculture, Tottori University Researchers DB KAKEN
Keywords
Salinity
Wastewater
Yield
Microelement
Productivity
Dryland
Abstract
Saline soil and saline groundwater reduce agricultural productivity on drylands. We are developing a new aquaponics system to improve food productivity on such lands while effectively utilizing saline groundwater. In this study, cultivation of Swiss chard (Beta vulgaris L. spp. cicla cv. Seiyou Shirokuki) was carried out using fish wastewater with a high salt concentration (1150 mg L−1 NaCl). The levels of microelements (e.g., Fe, Mn, Zn, and Cu) in the fish wastewater were very low, so we added microelements at 100% (W100), 50% (W50), 25% (W25), and 0% (W0) of the levels in the standard hydroponics solution to the fish wastewater and investigated the effects on growth of Swiss chard. At the first harvest, yields in all wastewater treatments were as high or higher than in the control. At the second harvest, yields in W100, W50, and W25 were not significantly different from the control, while in W0 the yield was significantly lower and chlorosis was evident. At the third harvest, the yield in all wastewater treatments was less than in the control, and chlorosis symptoms were observed in W25 and W0. Since leaf Mn and Zn concentrations in W25 and W0 had decreased to below the critical values for those microelements, Mn and Zn deficiency might have contributed to the observed chlorosis and yield loss. For the cultivation of Swiss chard with fish wastewater, sufficient yield (i.e., comparable to or better than the control) without chlorosis was obtained when microelements were added at 50% of the level of the control solution. In addition, since sufficient yield was obtained even in W0 at the first harvest, it is suggested that longer-term cultivation and higher yield could be achieved by applying 50% microelements after the first harvest.
Publisher
Elsevier
Content Type
Journal Article
Link
ISSN
03783774
Journal Title
Agricultural Water Management
Volume
227
Start Page
105851
Published Date
2020-01-20
Publisher-DOI
Text Version
Author
Rights
(C) 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Citation
Kaburagi, Emi. Yamada, Mina. Baba, Takashi. et al. Aquaponics using saline groundwater: Effect of adding microelements to fish wastewater on the growth of Swiss chard (Beta vulgaris L. spp. cicla). Agricultural Water Management. 227. 105851. 2020. doi:10.1016/j.agwat.2019.105851
Department
Faculty of Agriculture/Graduate School of Agriculture
Language
English
pii
S0378-3774(19)30370-1