Published

2024-08-30

Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop

Evaluación de la conductividad eléctrica y el pH de una solución nutritiva con sistema de recirculación en el cultivo de rosa

DOI:

https://doi.org/10.15446/agron.colomb.v42n2.115607

Keywords:

horticulture, cut flowers, recirculation drainage,, soilless culture, substrate (en)
horticultura, flores de corte, recirculación de drenaje, cultivo sin suelo, sustrato (es)

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Soilless culture systems with drainage recycling require continuous monitoring of electrical conductivity (EC) and pH, which are basic indicators of the chemical state of the solution that determine the extent to which recycling of nutrients is possible. These indicators are influenced by the physical, chemical, and microbiological properties of the substrates, as well as evapotranspiration, substrate temperature, and the stage of plant development. A rose crop cv. ‘Charlotte’ was established in three different substrates composed of mixtures of coconut fiber (CF) and burned rice husk (BRH). An automatic drainage recycling system was implemented with three percentages of nutrient recycling (0, 50, and 100%) to record the changes in EC and pH over 8 weeks of cultivation. This bifactorial experiment was carried out under a split-plot design in randomized complete blocks, where the main plot corresponded to the recycling percentage factor and the subplot to the substrate factor. The EC was significantly higher when recycling the nutrient solution in the following substrates: 35% BRH and 65% CF (35BRH) and 65% BRH and 35% CF (65BRH) at 1, 2, and 3 weeks after pruning (WAP). It was also higher for 100% BRH (100BRH) and 65BRH at 7 and 8 WAP. At 6 WAP, recycling at 50% and 100% had a significant effect on the EC values independent of the substrate. This could be caused by the release of ions and higher water retention, typical of CF, and the high adsorption of ions by the BRH. For pH, the trend was acidification, which was significant for the 100BRH treatment without recycling between 0 and 4 WAP. This could be related to changes in the absorption of ions such as NO3- and the activity of nitrifying microorganisms facilitated by the properties of the CF.

Los sistemas de cultivo sin suelo con reciclaje de drenajes requieren del seguimiento continuo de variables determinantes como la conductividad eléctrica (CE) y el pH, indicadores básicos del estado químico de la solución que determinan hasta dónde son posibles los eventos de reciclaje. Estas variables son influenciadas por las propiedades físicas, químicas y microbiológicas de los sustratos, la evapotranspiración del cultivo, la
temperatura de los sustratos, y el estadio de desarrollo de las plantas sembradas. Un cultivo de rosa cv. ‘Charlotte’ se estableció en sustratos compuestos por tres diferentes mezclas de fibra de coco (FC) y cascarilla de arroz quemada (CAQ), donde se implementó un sistema automático de reciclaje de drenajes con tres porcentajes de reciclaje de nutrientes (0, 50 y 100%), con el objetivo de conocer los cambios en CE y pH a lo largo de 8 semanas de cultivo. Este experimento bifactorial se llevó a cabo bajo un diseño de parcelas divididas en bloques completamente al azar, donde la parcela principal correspondió al factor porcentaje de reciclaje y la subparcela al factor sustrato. A las 1, 2 y 3 semanas después de la poda (SDP) la CE fue significativamente mayor al reciclar la solución en los sustratos: 35% CAQ con 65% FC (35CAQ) y 65% CAQ con 35% FC (65CAQ) y a las 7 y 8 SDP lo fue para 100% CAQ (100CAQ) y 65CAQ. A las 6 SDP hubo un efecto significativo de 50% y 100% de reciclaje independiente del sustrato. Lo anterior pudo ser causado por liberación de iones y alta retención de agua, propias de la FC y la alta adsorción de iones por la CAQ. Para el pH, la tendencia fue la acidificación, siendo significativa para el tratamiento 100CAQ sin reciclaje entre 0 y 4 SDP, lo que posiblemente se relaciona con los cambios en la absorción de iones como el NO3- y la actividad de microorganismos nitrificantes, facilitada por las propiedades de la FC.

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How to Cite

APA

Cuervo-Bejarano, W. J., Flórez-Roncancio, V. J. and Melo-Martínez, S. E. (2024). Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop. Agronomía Colombiana, 42(2), e115607. https://doi.org/10.15446/agron.colomb.v42n2.115607

ACM

[1]
Cuervo-Bejarano, W.J., Flórez-Roncancio, V.J. and Melo-Martínez, S.E. 2024. Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop. Agronomía Colombiana. 42, 2 (May 2024), e115607. DOI:https://doi.org/10.15446/agron.colomb.v42n2.115607.

ACS

(1)
Cuervo-Bejarano, W. J.; Flórez-Roncancio, V. J.; Melo-Martínez, S. E. Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop. Agron. Colomb. 2024, 42, e115607.

ABNT

CUERVO-BEJARANO, W. J.; FLÓREZ-RONCANCIO, V. J.; MELO-MARTÍNEZ, S. E. Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop. Agronomía Colombiana, [S. l.], v. 42, n. 2, p. e115607, 2024. DOI: 10.15446/agron.colomb.v42n2.115607. Disponível em: https://revistas.unal.edu.co/index.php/agrocol/article/view/115607. Acesso em: 23 apr. 2025.

Chicago

Cuervo-Bejarano, William Javier, Víctor Julio Flórez-Roncancio, and Sandra Esperanza Melo-Martínez. 2024. “Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop”. Agronomía Colombiana 42 (2):e115607. https://doi.org/10.15446/agron.colomb.v42n2.115607.

Harvard

Cuervo-Bejarano, W. J., Flórez-Roncancio, V. J. and Melo-Martínez, S. E. (2024) “Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop”, Agronomía Colombiana, 42(2), p. e115607. doi: 10.15446/agron.colomb.v42n2.115607.

IEEE

[1]
W. J. Cuervo-Bejarano, V. J. Flórez-Roncancio, and S. E. Melo-Martínez, “Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop”, Agron. Colomb., vol. 42, no. 2, p. e115607, May 2024.

MLA

Cuervo-Bejarano, W. J., V. J. Flórez-Roncancio, and S. E. Melo-Martínez. “Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop”. Agronomía Colombiana, vol. 42, no. 2, May 2024, p. e115607, doi:10.15446/agron.colomb.v42n2.115607.

Turabian

Cuervo-Bejarano, William Javier, Víctor Julio Flórez-Roncancio, and Sandra Esperanza Melo-Martínez. “Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop”. Agronomía Colombiana 42, no. 2 (May 1, 2024): e115607. Accessed April 23, 2025. https://revistas.unal.edu.co/index.php/agrocol/article/view/115607.

Vancouver

1.
Cuervo-Bejarano WJ, Flórez-Roncancio VJ, Melo-Martínez SE. Evaluation of electrical conductivity and pH in a nutrient solution with recirculating system in rose crop. Agron. Colomb. [Internet]. 2024 May 1 [cited 2025 Apr. 23];42(2):e115607. Available from: https://revistas.unal.edu.co/index.php/agrocol/article/view/115607

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