Closing the Water and Nutrient Cycles in Soilless Cultivation Systems

Beerling, E.A.M.; Blok, C.; Maas, Azwar; Os, E.A. van

doi:10.17660/actahortic.2014.1034.4

Cited by 29 publications

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“…A and B solution storage tanks should be adapted in the same week as analysis results return. Growers often say (Beerling et al, 2014) that an unbalanced nutrient solution is reason for discharge. showed that a more stable solution can be achieved with less need to discharge.…”

Section: Nutrient Analysismentioning

confidence: 99%

“…For Plant Protection Products (PPPs) additional regulations (Ministry of Infrastructure and Environment, 2013;van Ruijven et al, 2014 were made to decrease concentrations of PPPs by 95% in 2018 as concentrations in surface water were too high (Teunissen, 2005). Beerling et al (2014) investigated growers reasons to discharge: accumulation of sodium, refreshing the solution, root-borne diseases despite disinfection, discharge of filter rinsing water, remnant solutions at the end of the crop cycle and fear for accumulation of substances (softeners). Based on these enquiries a technical design was made how to realize a zero liquid discharge cultivation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Zero liquid discharge in soilless greenhouse horticulture: solutions to save water and the environment while ensuring an optimal production

Os¹,

Beerling²,

Blok³

et al. 2020

Acta Hortic.

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This article is made publicly available in the institutional repository of Wageningen University and Research, under the terms of article 25fa of the Dutch Copyright Act, also known as the Amendment Taverne. This has been done with explicit consent by the author.Article 25fa states that the author of a short scientific work funded either wholly or partially by Dutch public funds is entitled to make that work publicly available for no consideration following a reasonable period of time after the work was first published, provided that clear reference is made to the source of the first publication of the work.This publication is distributed under The Association of Universities in the Netherlands (VSNU) 'Article 25fa implementation' project. In this project research outputs of researchers employed by Dutch Universities that comply with the legal requirements of Article 25fa of the Dutch Copyright Act are distributed online and free of cost or other barriers in institutional repositories. Research outputs are distributed six months after their first online publication in the original published version and with proper attribution to the source of the original publication.

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Section: Nutrient Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zero liquid discharge in soilless greenhouse horticulture: solutions to save water and the environment while ensuring an optimal production

Os¹,

Beerling²,

Blok³

et al. 2020

Acta Hortic.

Self Cite

View full text Add to dashboard Cite

show abstract

“…stonewool, cocopeat or peat moss) and reuse drainage water. Nevertheless, growers still decide to discharge their nutrient solution (Beerling et al, 2014). With this so called discharge water, horticulture has an effect on surface water quality by discharging drain water, possibly also containing plant protection products, to surface water.…”

Section: Introductionmentioning

confidence: 99%

Microbially healthy water ingreenhouse horticulture : prevention and removal of biofilm formation in zerodischarge cultivation systems

Ruijven¹,

Persijn²,

Learbuch³

et al. 2020

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Behandeling van biofilms in irrigatieleidingen is een belangrijk aspect in het bereiken van een emissieloos teeltsysteem, zoals de doelstelling voor de Nederlandse glastuinbouw in 2027. Een testsysteem (in drievoud) en protocol zijn ontwikkeld en gebouwd voor het testen van de effectiviteit van technologieën en producten in het voorkomen van biofilmvorming en het verwijderen van bestaande biofilms. Onder tuinbouwomstandigheden (temperatuur, watersamenstelling, materiaal irrigatieleiding, systeemlengte, etc.) hebben het systeem en het protocol laten zien in staat te zijn een reproduceerbare biofilm in de drie parallelle systemen te kunnen produceren. Vijf technieken zijn getest met dit systeem: • (1) Oxyl-PRO S zilver gestabiliseerde H 2 O 2 heeft laten zien effectief te zijn in het voorkomen van biofilmvorming, maar heeft geen significant effect in het verwijderen van een bestaande biofilm laten zien. • (2) SureFlow ClO 2 heeft laten zien effectief te zijn in zowel het verwijderen van een bestaande biofilm als het voorkomen van biofilmvorming. • (3) Antibacteriële leidingen, (4) AQUA4D ® en (5) SonoPure Ultrasoon hebben geen significant effect laten zien in zowel voorkomen van biofilmvorming als verwijderen van een bestaande biofilm. Geen van de onderzochte technieken gaf een selectief effect op de samenstelling van de microbiële gemeenschap in de biofilm.

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“…Open-loop soilless culture systems are easier to implement, but resource losses are inevitable. Moreover, due to the intensive use of fertilizers, the threat posed to aquatic environments by repeated discharging a certain ratio of drainage is serious enough to warrant regulation by national governments [3][4][5][6]. Since a closed-loop soilless culture system reuses its drainage, the resulting variation in nutrient concentration can significantly affect the plant growth as the reuse period becomes longer [5,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis of Nutrient Variations in Electrical Conductivity-Based Closed-Loop Soilless Culture Systems by Nutrient Replenishment Method

Ahn

Son

2019

Agronomy

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In closed-loop soilless culture systems, variation in nutrients can lead to instability in the nutrient management and forced discharge of nutrients and water. Total nutrients absorbed by plants are replenished in an electrical conductivity-based closed-loop system, and fluctuation in electrical conductivity within a certain range around the initial value can be expected. However, this is not always observed in systems using conventional nutrient-replenishment methods. The objectives of this study were to analyze nutrient variation in a closed-loop soilless culture system based on a theoretical model and derive an alternative nutrient-replenishment method. The performance of the derived alternative method was compared with a conventional nutrient-replenishment method through simulation analysis. A demonstration experiment using sweet peppers was then conducted to confirm whether the theoretical analysis results can be reproduced through actual cultivation. The average amounts of injected nutrients during the experimental period of four months in the conventional and alternative methods were 2257 and 1054 g, respectively. There was no significant difference in the yield of sweet peppers between the two methods. The substrate electrical conductivity in the alternative method was maintained at 2.7 dS·m −1 ± 0.5 within the target electrical conductivity value, while that in the conventional method gradually increased to 5.0 dS·m −1 ± 1.2. In a simulation study, results similar to the demonstration experiment were predicted. Total nutrient concentrations in the alternative method showed fluctuations around the target value but did not continuously deviate from the target value, while those in the conventional method showed a tendency to increase. As a whole, these characteristics of the alternative method can help in minimizing nutrients and water emissions from the cultivation system. Agronomy 2019, 9, 649 2 of 16techniques, unlike open-loop systems. In order to appropriately apply those techniques, theoretical models are required and the problems should be precisely defined [10].In both closed-loop and open-loop soilless culture systems, the electrical conductivity (EC) of the nutrient solution in the mixing tank is adjusted to a target value before the solution is applied to the plant [9,11,12]. However, unlike an open-loop system, the mixing ratio of tap water to stock solution in a closed-loop system is adjusted by considering the change in nutrient concentration due to the inflow of drainage [12]. Alternatively, in simple systems, a premixed standard nutrient solution of a certain EC is supplied based on the difference between initial and current water levels in the circulation tank, which simultaneously performs drainage collection and nutrient-solution feeding [13,14]. In an EC-based closed-loop soilless culture system, supply of stock solution or standard nutrient solution and tap water is intended to replenish nutrients and water consumed in the system [12]. For a single system in which the plants are grown ...

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Closing the Water and Nutrient Cycles in Soilless Cultivation Systems

Cited by 29 publications

References 0 publications

Zero liquid discharge in soilless greenhouse horticulture: solutions to save water and the environment while ensuring an optimal production

Zero liquid discharge in soilless greenhouse horticulture: solutions to save water and the environment while ensuring an optimal production

Microbially healthy water ingreenhouse horticulture : prevention and removal of biofilm formation in zerodischarge cultivation systems

Theoretical and Experimental Analysis of Nutrient Variations in Electrical Conductivity-Based Closed-Loop Soilless Culture Systems by Nutrient Replenishment Method

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