Next Article in Journal
Effects of Diversity, Coverage and Biomass of Submerged Macrophytes on Nutrient Concentrations, Water Clarity and Phytoplankton Biomass in Two Restored Shallow Lakes
Previous Article in Journal
The Effect of Habitat Structure Boulder Spacing on Near-Bed Shear Stress and Turbulent Events in a Gravel Bed Channel

This is an early access version, the complete PDF, HTML, and XML versions will be available soon.

Open AccessArticle

Nutrient Removal Efficiency and Growth of Watercress (Nasturtium officinale) under Different Harvesting Regimes in Integrated Recirculating Aquaponic Systems for Rearing Common Carp (Cyprinus carpio L)

1
Georgikon Fish Research Laboratory, Georgikon Faculty, University of Pannonia, Keszthely H-8360, Hungary
2
Laboratory of Aquaculture, Institute of Animal Science, Biotechnology and Nature Conservation, Department of Animal Husbandry, University of Debrecen, Debrecen H-4032, Hungary
*
Authors to whom correspondence should be addressed.
Water 2020, 12(5), 1419; https://doi.org/10.3390/w12051419
Received: 25 April 2020 / Revised: 12 May 2020 / Accepted: 14 May 2020 / Published: 16 May 2020
The harvesting of plant biomass is usually implemented as an effective tool for plant management and removing the nutrients absorbed in plant tissues. Here, the influence of harvesting different biomasses (50%, 33%, 25%, and 0% (no harvest)) of watercress (Nasturtium officinale) was investigated in integrated recirculating aquaponic systems (IRASs) for rearing common carp (Cyprinus carpio). Twelve independent IRASs were designed (4 × 3); each system consisted of a fish rearing tank, a waste collection tank, and a hydroponic bed. Water quality parameters and the growth of both fish and plants were measured in all the systems, and then the nutrient removal capacities of the hydroponic beds were calculated. The results revealed that increasing the biweekly harvested biomass of the plants decreased the growth of the watercress, while it did not affect the growth of the common carp. Increasing the harvested biomass of the plants also decreased the nitrate nitrogen and orthophosphate removal efficiencies of the aquaponic systems, while it did not affect the ammonia and nitrite nitrogen removal efficiencies. Therefore, a biweekly harvesting of less than 25% of the biomass of the growing watercress is recommended for efficient nutrient removal and the sustainable growth of both watercress and the common carp in aquaponic systems.
Keywords: biomass harvesting; common carp; integrated recirculating aquaponic system; nutrients removal; watercress biomass harvesting; common carp; integrated recirculating aquaponic system; nutrients removal; watercress
MDPI and ACS Style

Irhayyim, T.; Fehér, M.; Lelesz, J.; Bercsényi, M.; Bársony, P. Nutrient Removal Efficiency and Growth of Watercress (Nasturtium officinale) under Different Harvesting Regimes in Integrated Recirculating Aquaponic Systems for Rearing Common Carp (Cyprinus carpio L). Water 2020, 12, 1419.

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.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop