Effect of dietary phytase on phosphorus use efficiency and dynamics in aquaponics

Cerozi, Brunno da Silva; Fitzsimmons, K.

doi:10.1007/s10499-016-0109-7

Cited by 15 publications

(6 citation statements)

References 20 publications

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“…There were no significant differences between the concentrations of any of these anions among the system units (P>0.05). Phosphate levels in all units increased up to 7 mg/L in all tanks (Figure 2), consistent with the observations of da Silva Cerozi and Fitzsimmons (2017). Phosphorus availability for plants rises with a decrease in pH and an increase in temperature (Cerozi et al, 2016).…”

Section: Resultssupporting

confidence: 90%

Effect of Different Inorganic Substrates on Growth Performance of African Catfish (Clarias gariepinus, Burchell 1822) and Lettuce (Lactuca sativa L.)

Yeşiltaş¹,

Koçer²,

Sevgi̇li̇³

et al. 2021

Turkish JAF Sci.Tech.

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Lettuce (Lactuca sativa L.) and African catfish (Clarias gariepinus) were preferred to grow in aquaponics due to their high and fast productivity growth. However, limited research was conducted on the impact on different inorganic substrates’ growth performance in aquaponics. In this study, lettuce’s growth performance was determined in four different kinds of inorganic substrates in Nutrient Film Technique (NFT) aquaponics by measuring final weight, daily growth rate, stem diameter, plant and root lengths, leaf number per plant and shoot/root ratio. Polyester fiber, rock wool, zeolite, and gravel were used as inorganic substrate materials. A constant flow rate of 0.3 L/min was maintained using with a submersible pump motor. At the end of the study, the African catfish’s feed conversion ratio was estimated to be 0.66, while the specific growth rate (SGR) was 2.3%. Total lettuce yields for polyester fiber, rock wool, zeolite and gravel were obtained as 5.072,22 kg/m2, 4.934,03 kg/m2, 6.067 kg/m2, and 5.382,64 kg/m2 respectively. There were statistically significant differences for daily growth rate between the inorganic substrates that the significantly highest values were recorded in the zeolite. The results revealed that initial plant length and shoot/root ratio were the significant factors on the growth performance for lettuce in aquaponic system tested. The best lettuce yield performance was observed in zeolite substrate but, economically available option was found as gravel for hydroponic troughs.

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Section: Resultssupporting

confidence: 90%

Effect of Different Inorganic Substrates on Growth Performance of African Catfish (Clarias gariepinus, Burchell 1822) and Lettuce (Lactuca sativa L.)

Yeşiltaş¹,

Koçer²,

Sevgi̇li̇³

et al. 2021

Turkish JAF Sci.Tech.

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“…The presence of phytase has promoted the break of the phytase molecule, making available a higher amount of phosphorus, thus enabling higher absorption of nutrients present in foods of plant origin (Scottá et al 2014;Da Silva-Cerozi and Fitzsimmons 2017).…”

Section: Discussionmentioning

confidence: 99%

“…The addition of phytase in plant-based diets for fish assists in the digestion and absorption of nutrients, consequently improving the animals' productive performance and health status (Dersjant-Li et al 2015;Zhu et al 2015;Da Silva-Cerozi and Fitzsimmons 2017).…”

Section: Introductionmentioning

confidence: 99%

Replacement of corn by sorghum and phytase supplementation in silver catfish (Rhamdia quelen) diets: growth performance, physiological variables and bone mineralization

Rodrigues

Sanchez

Pessini

et al. 2020

Journal of Applied Animal Research

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This study aimed at assessing productive growth performance, blood physiology, intestinal histology, body composition and bone mineralization parameters of silver catfish juveniles fed diets containing different inclusion levels of sorghum, considering three combinations (0%, 50% or 100%), supplemented or not with phytase enzyme (0 and 1500 FTU kg −1 ). The apparent feed conversion and specific growth rate were benefited by supplemented diets (P < 0.05). The highest protein efficiency rate was obtained for the supplemented diet containing corn (P < 0.05). The viscerosomatic index was lower when corn/sorghum diet (P < 0.05) was offered, whilst the hepatosomatic index was lower in corn and corn/sorghum diets regardless of supplementation (P < 0.05). Regarding blood parameters, variations were observed (P < 0.05), however they were kept within the limits for the species. Histomorphometry variables also displayed variations, which were observed in fish fed with sorghum and sorghum/corn diets, supplemented or not (P < 0.05). Proximate composition of carcass varied for both aether extract and mineral matter for supplemented diets (P < 0.05). A variation of Ca content (P < 0.05) regarding bone mineralization was observed when corn and sorghum were used in the same proportion. Sorghum replacement of corn in diets for R. quelen may be a feasible alternative, and phytase supplementation with improves fish performance.

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“…On the other hand, non-starch polysaccharides (NSPs) and phytate are among the main challenges when plant-based fish feed is used [14][15][16]. Plant-based feeds have a high phytate content, and fish cannot efficiently utilise phytate [17]. This leads to the excretion of phytate into the water, resulting in nutrient pollution, algal growth, and hypoxic environments [18].…”

Section: Introductionmentioning

confidence: 99%

Bacterial Communities Associated with the Cycling of Non-Starch Polysaccharides and Phytate in Aquaponics Systems

et al. 2021

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Aquaponics are efficient systems that associate aquatic organisms’ production and plants by recirculating water and nutrients between aquaculture and hydroponic tanks. In this study, we characterised the bacterial communities in the freshwater aquaponics system that can mineralise polysaccharides and phytate by producing carbohydrate-degrading enzymes and phytases, by 16S rRNA gene sequencing and in vitro culture techniques. Around 20% of the operational taxonomic units (zOTUs) identified were previously reported to carry fibre-degrading enzyme putative genes, namely β-glucanase (1%), xylanase (5%), or cellulases (17%). Ten % of the zOTUs were previously reported to carry putative genes of phytases with different catalytic mechanisms, namely β-propeller (6%), histidine acid phytases (3%), and protein tyrosine phytase (<1%). Thirty-eight morphologically different bacteria were isolated from biofilms accumulated in fish and plant compartments, and identified to belong to the Bacilli class. Among these, 7 could produce xylanase, 8 produced β-glucanase, 14 produced cellulase, and 11 isolates could secrete amylases. In addition, Staphylococcus sp. and Rossellomorea sp. could produce consistent extracellular phytate-degrading activity. The PCR amplification of β-propeller genes both in environmental samples and in the isolates obtained showed that this is the most ecologically relevant phytase type in the aquaponics systems used. In summary, the aquaponics system is abundant with bacteria carrying enzymes responsible for plant-nutrient mineralisation.

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Effect of dietary phytase on phosphorus use efficiency and dynamics in aquaponics

Cited by 15 publications

References 20 publications

Effect of Different Inorganic Substrates on Growth Performance of African Catfish (Clarias gariepinus, Burchell 1822) and Lettuce (Lactuca sativa L.)

Effect of Different Inorganic Substrates on Growth Performance of African Catfish (Clarias gariepinus, Burchell 1822) and Lettuce (Lactuca sativa L.)

Replacement of corn by sorghum and phytase supplementation in silver catfish (Rhamdia quelen) diets: growth performance, physiological variables and bone mineralization

Bacterial Communities Associated with the Cycling of Non-Starch Polysaccharides and Phytate in Aquaponics Systems

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