Phosphorus dynamics modeling and mass balance in an aquaponics system

Cerozi, B. S.; Fitzsimmons, K.

doi:10.1016/j.agsy.2017.01.020

Cited by 69 publications

(46 citation statements)

References 17 publications

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“…The P content of the water in the APW system was not enough for vegetable production in soilless systems. This result was also obtained in other experiments and shows the need for nutrient supplementation (especially P and K) in order to meet the main nutritional needs of the crops [28][29][30][31]. The addition of K and P can be considered an indispensable condition for obtaining suitable production levels.…”

Section: Water Qualitysupporting

confidence: 72%

“…This result can be justified by the more stressful conditions that the plants were exposed to during the crop cycle in the APW system. A possible stressful situation that might have arisen in the APW system in particular might be connected to the unbalanced presence of nutrients that could not guarantee an adequate nutrient supply to the plants [28][29][30][31]. The lower values of antioxidants and total phenols found in the CAPW could be traced to better nutritional values in the crop, which is also confirmed by other production (marketable biomass) and nutritional (chlorophyll content) parameters.…”

Section: Vegetable Speciesmentioning

confidence: 89%

“…The remarkable NO 3 − content in the APW system plants was evident; on average, 88.8% and 95.2% higher than the plants from the HC and CAPW systems, respectively. This result can be justified by the reduced presence of other macronutrients [28][29][30][31]. The NO 3 − values were on average higher in M, however, the values did not exceed the limits set by European Regulation no.…”

Section: Vegetable Speciesmentioning

confidence: 90%

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Extension of Aquaponic Water Use for NFT Baby-Leaf Production: Mizuna and Rocket Salad

et al. 2018

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Aquaponics is a recirculating technology that combines aquaculture with hydroponics. It allows nutrients from fish waste to feed plants and thus saves water and nutrients. However, there is a mismatch between the nutrients provided by the fish waste and plant needs. Because of this, some nutrients, notably N, tend to accumulate in the aquaponic water (APW or AP water). The aim of this study was to investigate how APW, which is depleted of P and K but still rich in N, could be further utilized. APW was used in a mesocosm and compared with APW from the same source that had been supplemented with macro-nutrients (complemented AP water or CAPW) and a hydroponic control (HC). Mizuna (M) and rocket salad (R) were used as short-cycle vegetable crops in a NFT system. The results revealed that the low production potential of APW was mainly caused by the lack of P and K. If these were supplemented, the yields were comparable to those in the HC. M yield in CAPW was significantly higher than that of HC, probably due to biostimulant effects connected to the organic components in the water as a result of fish farming. Water type, cultivation density, and intercropping significantly influenced the qualitative characteristics of the crop in terms of antioxidant compounds and minerals. Nitrate content in vegetables was lower than European regulation limits. The extended use of APW is viable if the missing nutrients are supplemented; this could be a strategy to increase the efficiency of water and nitrogen use, while further reducing environmental impact.

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Section: Water Qualitysupporting

confidence: 72%

Section: Vegetable Speciesmentioning

confidence: 89%

Section: Vegetable Speciesmentioning

confidence: 90%

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Extension of Aquaponic Water Use for NFT Baby-Leaf Production: Mizuna and Rocket Salad

et al. 2018

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“…Nitrification is a two-step process during which the ammonia NH 3 or ammonium NH 4 + excreted by the fish is transformed first into nitrite NO 2 À and then into nitrate NO 3 À by specific aerobic chemosynthetic autotrophic bacteria. A high availability of dissolved oxygen is required as nitrification consumes oxygen (Carsiotis and Khanna 1989;Madigan and Martinko 2007;Shoda 2014). The first step of this transformation is carried out by ammonia-oxidising bacteria (AOB) such as Nitrosomonas, Nitrosococcus, Nitrosospira, Nitrosolobus and Nitrosovibrio.…”

Section: Nitrificationmentioning

confidence: 99%

Nutrient Cycling in Aquaponics Systems

Eck

Körner

Jijakli

2019

Aquaponics Food Production Systems

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In aquaponics, nutrients originate mainly from the fish feed and water inputs in the system. A substantial part of the feed is ingested by the fish and either used for growth and metabolism or excreted as soluble and solid faeces, while the rest of any uneaten feed decays in the tanks. While the soluble excretions are readily available for the plants, the solid faeces need to be mineralised by microorganisms in order for its nutrient content to be available for plant uptake. It is thus more challenging to control the available nutrient concentrations in aquaponics than in hydroponics. Furthermore, many factors, amongst others pH, temperature and light intensity, influence the nutrient availability and plant uptake. Until today, most studies have focused on the nitrogen and phosphorus cycles. However, to ensure good crop yields, it is necessary to provide the plants with sufficient levels of all key nutrients. It is therefore essential to better understand and control nutrient cycles in aquaponics.

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“…Under anaerobic conditions, low molecular organic compounds are converted to polyhydroxyalkanoates (PHA), poly-P and glycogen are degraded, and phosphorus is released [13]. Phosphate accumulation due to degradation of organic P was also reported [9] but on the contrary another study by [52] showed a declining trend in phosphorus concentration throughout the study period.…”

Section: Discussionmentioning

confidence: 99%

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

Gichana

Meulenbroek

Ogello

et al. 2019

Water

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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.

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Phosphorus dynamics modeling and mass balance in an aquaponics system

Cited by 69 publications

References 17 publications

Extension of Aquaponic Water Use for NFT Baby-Leaf Production: Mizuna and Rocket Salad

Extension of Aquaponic Water Use for NFT Baby-Leaf Production: Mizuna and Rocket Salad

Nutrient Cycling in Aquaponics Systems

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

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