Next Article in Journal
Heritage-Based Water Harvesting Solutions
Previous Article in Journal
Influence of Environmental and Anthropogenic Factors on Microbial Ecology and Sanitary Threat in the Final Stretch of the Brda River
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle

Growth and Nutrient Removal Efficiency of Sweet Wormwood (Artemisia annua) in a Recirculating Aquaculture System for Nile Tilapia (Oreochromis niloticus)

1
Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, 1180 Vienna, Austria
2
Department of Fisheries and Natural Resources, Maseno University, Private Bag, Maseno 40105, Kenya
3
Division of Livestock Sciences, University of Natural Resources and Life Sciences (BOKU), 1180 Vienna, Austria
4
Department of Biological Sciences, University of Eldoret, 1125, Eldoret 30100, Kenya
5
Department of Zoology, Entomology and Fisheries Sciences, Makerere University, Kampala 7062, Uganda
*
Author to whom correspondence should be addressed.
Water 2019, 11(5), 923; https://doi.org/10.3390/w11050923
Received: 20 March 2019 / Revised: 22 April 2019 / Accepted: 23 April 2019 / Published: 1 May 2019
(This article belongs to the Section Water Quality and Ecosystems)
  |  
PDF [927 KB, uploaded 1 May 2019]
  |  

Abstract

The maintenance of optimal water quality for fish production is one of the major challenges in aquaculture. Aquaponic systems can improve the quality of water for fish by removing the undesirable wastes and in turn produce a second marketable crop. However, there is no information on the growth and nutrient removal capability of Artemisia annua in aquaponic systems. This study evaluated the effect of plant density on water quality, the growth of A. annua and Oreochromis niloticus in a small scale aquaponic system in Kenya. The aquaponic system consisted of three treatments representing different plant densities (D1: 48 plants/m2, D2: 24 plants/m2 and D3:0 plants/m2). The high plant density system contributed significantly (p < 0.05) to the removal of all nutrients. The removal efficiency of ammonia was significantly higher in D1 (64.1 ± 14.7%) than in D2 (44.5 ± 6.8%) and D3 (38.0 ± 12.1%). Nitrates and nitrites were inconsistent, whereas phosphorus increased gradually in all treatments. The productivity of plants was higher in D1 than D2. Fish growth rates were significantly higher in D1 (0.35 ± 0.03 g/d) and D2 (0.32 ± 0.02 g/d) than in D3 (0.22 ± 0.04 g/d). The results show that A. annua can be cultivated in aquaponic systems due to its nitrogen removal capabilities. View Full-Text
Keywords: aquaponics system; denitrification; Nile tilapia; nitrification; plant density aquaponics system; denitrification; Nile tilapia; nitrification; plant density
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Gichana, Z.; Meulenbroek, P.; Ogello, E.; Drexler, S.; Zollitsch, W.; Liti, D.; Akoll, P.; Waidbacher, H. Growth and Nutrient Removal Efficiency of Sweet Wormwood (Artemisia annua) in a Recirculating Aquaculture System for Nile Tilapia (Oreochromis niloticus). Water 2019, 11, 923.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top