Nutrient Solutions for Hydroponic Systems

Trejo-Téllez, Libia Iris; Gómez-Meriño, Fernando Carlos

doi:10.5772/37578

Cited by 34 publications

(22 citation statements)

References 55 publications

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“…The ammonium content of the digested wastewater was similar to that used in the inorganic fertilizer control and within the 100-250 ppm recommended range [35,36]. The only concerning factor was that the N ratio (R N = NH 4 − N/NO 3 − N) [37] was extremely high: >1000, and since all the N was in the form of ammonium, this could generate problems of ammonia toxicity and yield reduction [38,39], though this was not observed. Phosphorus tests showed an orthophosphate concentration as low as 22 ppm in the pure digested wastewater (Table 3), a level similar to our previous hydroponic experiments [32] and lower than the raw wastewater, which can be explained by the 50% dilution of the digester leachate before use.…”

Section: Water Testmentioning

confidence: 71%

“…This highlights the need for further research on crop suitability for digested wastewater production in order to better understand which crops may produce acceptable yields, as well as the factors driving those differences and how to enhance nitrification for those crops where nitrate is preferentially taken up. Many factors affect nitrification rates including: pH of the substrate, substrate material [46], temperature [47], ammonia to nitrate ratio, carbon to nitrogen ratio [16], original bacteria population levels, and inoculation [19,37]. Additionally, future studies should test how to optimize this ammonia addition to minimize nitrogen concentration in the final effluent.…”

Section: Discussionmentioning

confidence: 99%

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Anaerobically-Digested Brewery Wastewater as a Nutrient Solution for Substrate-Based Food Production

et al. 2019

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Urban agriculture, due to its location, can play a key role in recycling urban waste streams, promoting nutrient recycling, and increasing sustainability of food systems. This research investigated the integration of brewery wastewater treatment through anaerobic digestion with substrate-based soilless agriculture. An experiment was conducted to study the performance of three different crops (mustard greens (Brassica juncea), basil (Ocimum basilicum), and lettuce (Lactuca sativa) grown with digested and raw brewery wastewater as fertilizer treatments. Mustard greens and lettuce grown in digested wastewater produced similar yields as the inorganic fertilizer control treatment, while basil had slightly lower yields. In all cases, crops in the digested wastewater treatments produced higher yields than raw wastewater or the no fertilizer control, indicating that nutrients in the brewery wastewater can be recovered for food production and diverted from typical urban waste treatment facilities.

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Section: Water Testmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Anaerobically-Digested Brewery Wastewater as a Nutrient Solution for Substrate-Based Food Production

et al. 2019

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“…The proportions of nitrogen corresponded to hydroponic nutrient solutions for basil production [11], while phosphate and potassium were also lower in comparison to aquaponic nutrient solutions [49]. Hydroponics nutrient solutions usually contain six essential nutrients, N, P, K, Ca, Mg, and S, which must be available in the correct ion ratios for optimal plant growth [50]. In hydroponic sciences, there are several formulations of nutrient solutions, which range in mg/L: N 170-235, P 30-60, K 150-300, Ca 160-185, Mg 35-50, and S 50-335 [50].…”

Section: Physio-chemical Parametersmentioning

confidence: 99%

Growth of Basil (Ocimum basilicum) in DRF, Raft, and Grow Pipes with Effluents of African Catfish (Clarias gariepinus) in Decoupled Aquaponics

Pasch

Ratajczak²,

Appelbaum

et al. 2021

AgriEngineering

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Basil (Ocimum basilicum) was cultivated in Rostock, Northern Germany, in a decoupled aquaponic system with African catfish (Clarias gariepinus) under intensive rearing conditions by using three hydroponic components, the dynamic root floating technique (DRF), the raft technique, and grow pipes. A 25% of the recommended feed input still allowed African catfish growth and provided adequate nitrogen and calcium levels in the process water. After 36 days, the plants were examined with respect to 16 different growth parameters. DRF performed significantly better than raft and/or grow pipes in 11 parameters. Total weight of basil was significantly higher in DRF (107.70 ± 34.03 g) compared with raft (82.02 ± 22.74 g) and grow pipes (77.86 ± 23.93 g). The economically important leaf biomass was significantly higher in wet and dry weight under DRF cultivation (45.36 ± 13.53 g; 4.96 ± 1.57 g) compared with raft (34.94 ± 9.44 g; 3.74 ± 1.04 g) and grow pipes (32.74 ± 9.84 g; 3.75 ± 1.22 g). Two main factors limited plant growth: an unbalanced nutrient concentration ratio and high water temperatures with an average of 28 °C (max 34.4 °C), which resulted in reduced root activity in raft and grow pipes. DRF was able to maintain root activity through the 5 cm air space between the shoots and the nutrient solution and thus produced significantly more biomass. This suggests DRF to be used for basil aquaponics under glass house conditions with high-temperature scenarios. Future studies are needed to optimize nutrient loads and examine systems with the plant roots exposed to air (Aeroponics).

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“…The soil-less methodology is a technology for plant production that can control environmental factors and diseases (Trejo-Téllez & Gómez-Merino, 2012;Wahome, Oseni, Masarirambi, & Shongwe, 2011). A hydroponic system is an apt one for conducting the research (Alatorre-Cobos et al, 2014), so it may be useful in root investigation, simplifying the washing process.…”

Section: Introductionmentioning

confidence: 99%

Hydroponics: An Alternative Method for Root and Shoot Classification on Sugarcane Genotypes

2019

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A hydroponic system was considered to be an appropriate method for root investigations, particularly if the method can be established as a screening technique to classify differences in root traits among sugarcane lines. The aim of the research was to classify root and shoot characters of sugarcane lines grown under hydroponic conditions and to investigate their correlation with the field measurements. Hydroponic and field tests used a randomized complete block design (RCBD). Eight elite sugarcane lines were assigned as treatments. Shoot and root traits were measured at 3 months after transplanting in the hydroponic experiment, and field trial measured root length density (RLD) at 4 months after planting. Root and shoot traits under the hydroponic system showed significant differences among sugarcane lines. KK3 had a high root surface area, root volume, root length and root dry weight and TBy27-1385 demonstrated a high stem height and stem dry mass. Moreover, root dry weight, root volume and root surface area positively correlated with shoot dry mass. Positive correlation was exhibited between root traits such as dry weight of root and root length derived from hydroponic studies and RLD derived from field conditions.

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Nutrient Solutions for Hydroponic Systems

Cited by 34 publications

References 55 publications

Anaerobically-Digested Brewery Wastewater as a Nutrient Solution for Substrate-Based Food Production

Anaerobically-Digested Brewery Wastewater as a Nutrient Solution for Substrate-Based Food Production

Growth of Basil (Ocimum basilicum) in DRF, Raft, and Grow Pipes with Effluents of African Catfish (Clarias gariepinus) in Decoupled Aquaponics

Hydroponics: An Alternative Method for Root and Shoot Classification on Sugarcane Genotypes

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