Closed hydroponic systems: operational parameters, root exudates occurrence and related water treatment

Hosseinzadeh, Seyedahmad; Verheust, Yannick; Bonarrigo, Guglielmo; Hulle, Stijn Van

doi:10.1007/s11157-016-9418-6

Cited by 62 publications

(34 citation statements)

References 155 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Os valores de oxigênio dissolvido oscilaram um pouco devido a variação de temperatura e problemas com o sistema de oxigenação, se mantendo abaixo do valor mínimo recomendado, que é de 3 mg L -1 (Rakocy et al, 2006;Jordan et al, 2018) em algumas leituras. A necessidade de oxigênio das plantas aumenta com a temperatura, e a diminuição da concentração para valores abaixo de 3 mg L -1 inibi o crescimento das raízes (Hosseinzadeh et al, 2017), afetando assim o desenvolvimento das plantas.…”

Section: Resultsunclassified

Produtividade de híbridos de tomate cultivados em aquaponia associada em sistema tipo floating

Jordan

Giordano

Oliveira

et al. 2020

RSD

View full text Add to dashboard Cite

A pesquisa de laboratório teve o objetivo de avaliar produtividade de 5 híbridos de tomate (Apolo, Serato, Vento, Candieiro e Pioneiro) em um sistema aquapônico associado a criação de tilápias. O delineamento experimental empregado foi inteiramente casualizado, com 5 tratamentos (variedades de tomate) e quatro repetições. Cada repetição compreendeu um bloco de cultivo, uma área de um metro quadrado com 6 plantas. Foram monitorados os seguintes parâmetros da água do sistema: oxigênio dissolvido, pH, condutividade elétrica, temperatura mínima e máxima. A colheita foi realizada semanalmente entre o período de 05/01/2018 a 24/01/2018, totalizando quatro colheitas. No momento da colheita, foi determinada a massa e as medidas de cada fruto (diâmetro transversal e comprimento longitudinal). Os resultados foram analisados por meio de análise de variância pelo teste F e as médias comparadas pelo teste de Tukey, a 5% de probabilidade. O híbrido Apolo foi o que apresentou maior produtividade média total (104,53 t ha-1), com incrementos de produtividade variando de 19 a 61% em relação aos demais híbridos. As produtividades alcançadas podem ser consideradas elevadas e equivalentes a valores obtidos em cultivo convencional, em solo.

show abstract

Section: Resultsunclassified

Produtividade de híbridos de tomate cultivados em aquaponia associada em sistema tipo floating

Jordan

Giordano

Oliveira

et al. 2020

RSD

View full text Add to dashboard Cite

show abstract

“…Among these substances, benzoic acids were mainly found to inhibit the growth and yield of several crops (Hosseinzadeh et al, 2019). To overcome this issue, a number of treatment techniques have been proposed for root exudates degradation or removal, either physical (e.g., activated carbon adsorption, ion exchange resins, membrane filtration, sand filtration); chemical (e.g., TiO 2 photocatalysis, UV treatments, ozonation, electrodegradation); or biological (e.g., use of degrading microbial strains) (Asaduzzaman et al, 2012; Mondal et al, 2013; Hosseinzadeh et al, 2017; Talukder et al, 2018, 2019). All these treatments may have advantages and drawbacks as reviewed by Hosseinzadeh et al (2017).…”

Section: Open Issues Of Hydroponic Solutions Used In Soilless Agriculmentioning

confidence: 99%

Hydroponic Solutions for Soilless Production Systems: Issues and Opportunities in a Smart Agriculture Perspective

et al. 2019

View full text Add to dashboard Cite

Soilless cultivation represent a valid opportunity for the agricultural production sector, especially in areas characterized by severe soil degradation and limited water availability. Furthermore, this agronomic practice embodies a favorable response toward an environment-friendly agriculture and a promising tool in the vision of a general challenge in terms of food security. This review aims therefore at unraveling limitations and opportunities of hydroponic solutions used in soilless cropping systems focusing on the plant mineral nutrition process. In particular, this review provides information (1) on the processes and mechanisms occurring in the hydroponic solutions that ensure an adequate nutrient concentration and thus an optimal nutrient acquisition without leading to nutritional disorders influencing ultimately also crop quality (e.g., solubilization/precipitation of nutrients/elements in the hydroponic solution, substrate specificity in the nutrient uptake process, nutrient competition/antagonism and interactions among nutrients); (2) on new emerging technologies that might improve the management of soilless cropping systems such as the use of nanoparticles and beneficial microorganism like plant growth-promoting rhizobacteria (PGPRs); (3) on tools (multi-element sensors and interpretation algorithms based on machine learning logics to analyze such data) that might be exploited in a smart agriculture approach to monitor the availability of nutrients/elements in the hydroponic solution and to modify its composition in realtime . These aspects are discussed considering what has been recently demonstrated at the scientific level and applied in the industrial context.

show abstract

“…The nutrient concentration in hydroponic solutions is controlled by modulating only electrical conductivity (EC) and pH values at present [ 28 , 29 ]. Therefore, the closed hydroponic system still poses many challenges such as the imbalance in nutrient ratios caused by the lack or excess of some ions.…”

Section: Introductionmentioning

confidence: 99%

A Co-Nanoparticles Modified Electrode for On-Site and Rapid Phosphate Detection in Hydroponic Solutions

Wang

Bian

et al. 2021

Sensors

View full text Add to dashboard Cite

Conventional strategies for determining phosphate concentration is limited in efficiency due to the cost, time, and labor that is required in laboratory analysis. Therefore, an on-site and rapid detection sensor for phosphate is urgently needed to characterize phosphate variability in a hydroponic system. Cobalt (Co) is a highly sensitive metal that has shown a selectivity towards phosphate to a certain extent. A disposable phosphate sensor based on the screen-printed electrode (SPE) was developed to exploit the advantages of Co-nanoparticles. A support vector machine regression model was established to predict the concentration of phosphate in the hydroponic solutions. The results showed that Co-nanoparticles improve the detection limit of the sensor in the initial state. Meanwhile, the corrosion of Co-nanoparticles leads to a serious time-drift and instability of the electrodes. On the other hand, the coefficient of variation of the disposable phosphate detection chip is 0.4992%, the sensitivity is 33 mV/decade, and the linear range is 10−1–10−4.56 mol/L. The R2 and mean square error of the buffer-free sensor in the hydroponic solution are 0.9792 and 0.4936, respectively. In summary, the SPE modified by the Co-nanoparticles is a promising low-cost sensor for on-site and rapid measurement of the phosphate concentration in hydroponic solutions.

show abstract

Closed hydroponic systems: operational parameters, root exudates occurrence and related water treatment

Cited by 62 publications

References 155 publications

Produtividade de híbridos de tomate cultivados em aquaponia associada em sistema tipo floating

Produtividade de híbridos de tomate cultivados em aquaponia associada em sistema tipo floating

Hydroponic Solutions for Soilless Production Systems: Issues and Opportunities in a Smart Agriculture Perspective

A Co-Nanoparticles Modified Electrode for On-Site and Rapid Phosphate Detection in Hydroponic Solutions

Contact Info

Product

Resources

About