| Literature DB >> 25650140 |
Zhen Hu1, Jae Woo Lee2, Kartik Chandran3, Sungpyo Kim2, Ariane Coelho Brotto3, Samir Kumar Khanal4.
Abstract
Nitrogen transformations in aquaponics with different edible plant species, i.e., tomato (Lycopersicon esculentum) and pak choi (Brassica campestris L. subsp. chinensis) were systematically examined and compared. Results showed that nitrogen utilization efficiencies (NUE) of tomato- and pak choi-based aquaponic systems were 41.3% and 34.4%, respectively. The abundance of nitrifying bacteria in tomato-based aquaponics was 4.2-folds higher than that in pak choi-based aquaponics, primarily due to its higher root surface area. In addition, tomato-based aquaponics had better water quality than that of pak choi-based aquaponics. About 1.5-1.9% of nitrogen input were emitted to atmosphere as nitrous oxide (N2O) in tomato- and pak choi-based aquaponic systems, respectively, suggesting that aquaponics is a potential anthropogenic source of N2O emission. Overall, this is the first intensive study that examined the role plant species played in aquaponics, which could provide new strategy in designing and operating an aquaponic system.Entities:
Keywords: Ammonia oxidizing bacteria; Aquaponics; Nitrogen transformations; Nitrous oxide; Plant species
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Year: 2015 PMID： 25650140 DOI： 10.1016/j.biortech.2015.01.013
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642