Pourthru: A Method for Monitoring Nutrition in the Greenhouse

Cavins, Todd J.; Whipker, Brian E.; Fonteno, William C.

doi:10.17660/actahortic.2008.779.35

Cited by 57 publications

(73 citation statements)

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“…Only when nutrients solutions containing at least 8 mmol L −1 of K, independently of the N concentration, or solutions with 16 mmol L −1 of N and a minimum of 6 mmol L −1 of K or 20 mmol L −1 of N and any K concentration, the substratum CE reached values close to the inferior limit of the range considered adequate by Baumgarten [18], that is, from 0.8 to 1.5 dS m −1 and by Cavins et al [20], that is, from 0.76 to 1.5 dS m −1 as determined by the extraction methods by dilution 1 : 1,5 v/v and 1.2 v/v, respectively.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen and Potassium Concentrations in the Nutrients Solution for Melon Plants Growing in Coconut Fiber without Drainage

Gratieri

Filho

Barbosa

et al. 2013

The Scientific World Journal

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With the objective of evaluating the effects of N and K concentrations for melon plants, an experiment was carried out from July 1, 2011 to January 3, 2012 in Muzambinho city, Minas Gerais State, Brazil. The “Bonus no. 2” was cultivated at the spacing of 1.1 × 0.4. The experimental design was a randomized complete block with three replications in a 4 × 4 factorial scheme with four N concentrations (8, 12, 16, and 20 mmol L−1) and four K concentrations (4, 6, 8, and 10 mmol L−1). The experimental plot constituted of eight plants. It was observed that the leaf levels of N and K, of N-NO3 and of K, and the electrical conductivity (CE) of the substrate increased with the increment of N and K in the nutrients' solution. Substratum pH, in general, was reduced with increments in N concentration and increased with increasing K concentrations in the nutrients' solution. Leaf area increased with increments in N concentration in the nutrients solution. Fertigation with solutions stronger in N (20 mmol L−1) and K (10 mmol L−1) resulted in higher masses for the first (968 g) and the second (951 g) fruits and crop yield (4,425 gm−2).

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Section: Resultsmentioning

confidence: 99%

Nitrogen and Potassium Concentrations in the Nutrients Solution for Melon Plants Growing in Coconut Fiber without Drainage

Gratieri

Filho

Barbosa

et al. 2013

The Scientific World Journal

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“…Uma das técnicas adotadas no manejo da fertirrigação é o monitoramento do lixiviado ou Pour-Through (CAVINS et al, 2008), cujos diferentes atributos podem ser avaliados, como a condutividade elétrica (CE) e as concentrações de diferentes íons. A CE resulta da presença dos íons em solução e é diretamente relacionada com a concentração destes (HELBEL JUNIOR et al, 2008 Manejo da solução nutritiva sobre a qualidade pós-colheita de tomate salada fertirrigado em areia Takahashi, H. W. et al N, P, K, Ca, Mg e S do lixiviado foram obtidas de acordo com as metodologias descritas por Silva (2009).…”

Section: Introductionunclassified

Manejo da solução nutritiva sobre a qualidade pós-colheita de tomate salada fertirrigado em areia

Takahashi

Barzan

Bertoncelli

et al. 2017

Braz. J. Food Technol.

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado. Manejo da solução nutritiva sobre a qualidade pós-colheita de tomate salada fertirrigado em areia Management of the nutrient solution for postharvest quality of tomatoes with fertigation in sandResumo O presente trabalho teve como objetivo avaliar o efeito de manejos e concentrações da solução nutritiva em fertirrigação, em cultivo protegido, sobre a qualidade pós-colheita de tomate de mesa. Os tratamentos consistiram do manejo da solução nutritiva, tendo como base a condutividade elétrica (CE) e a concentração individual de íons (CI) do lixiviado, nas concentrações iniciais de 1,6 e 3,2 dS m -1 . Os frutos foram avaliados quanto aos teores de macrominerais, sólidos solúveis totais (SST), vitamina C, compostos fenólicos totais, flavonoides totais e compostos antioxidantes. Os teores de N, P e S foram maiores no manejo da solução nutritiva com base na CI, independentemente da concentração inicial de íons. Os teores de K e Ca apresentaram efeitos da interação entre a forma de manejo e a concentração de íons, enquanto o teor de Mg não foi influenciado pelos fatores estudados. O teor de vitamina C e a atividade antioxidante foram maiores no manejo da solução com base em CE, enquanto o teor de fenóis e flavonoides foi maior no manejo da solução com base em CI. O tipo de manejo e a concentração da solução nutritiva em fertirrigação afetam a qualidade pós-colheita de frutos de tomate. Lycopersicon esculentum Mill.; Fertirrigação; Minerais; Fenóis; Flavonoides; Antioxidantes. Palavras-chave: AbstractThe aim of this study was to evaluate the effect of the management of the nutrient solution concentrations used in the fertigation of table tomatoes cultivated in a protected environment, on postharvest quality. The treatments consisted of managing the nutrient solution based on the electrical conductivity (EC) and individual ionic concentrations (IC) in the leached solution at the levels of 1.6 and 3.2 dS m -1 . The fruits were evaluated for their macromineral contents, total soluble solids (TSS), vitamin C, total phenols, flavonoids and antioxidants. The N, P and S contents were higher for management of the nutrient solution based on the IC, regardless of the initial ion concentrations. The K and Ca contents showed interaction effects between the forms of management and ion concentrations, while the Mg content was not influenced by the factors studied. The vitamin C content and antioxidant activity were higher for management of the solution based on EC, while total phenols and flavonoids were greater for management based on IC. The type of management and the nutrient solution concentration used in fertigation affect the postharvest quality of tomato fruits. Keywords

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“…Leachate was collected in each irrigation event from pots using the PT method (Cavins et al, 2008). Thirty minutes after the crop had been irrigated 90 mL of distilled water was poured evenly over the surface of the substrate by hand and the extract was allowed to drain for 10 minutes, obtaining around 40 mL of leachate.…”

Section: Measurements Of Ec Using the Pour-through Methodsmentioning

confidence: 99%

“…While growers habitually record average EC L values from various pots in an irrigation zone (the leachate is easy to collect), EC L records rarely coincide with those of EC PW , because EC L depends on factors such as the leaching fraction, irrigation water salinity, the physical characteristics of the substrate and environmental conditions Hershey, 1991, Torres et al, 2010). Another way of measuring EC PW on-site is the pour-through (PT) method, which was described by Wright (1986) and adapted by Cavins et al (2008). Pourthrough extraction occurs by displacement of the root zone solution by distilled water poured over the top of a substrate as a means to obtain a soil solution sample.…”

Section: Introductionmentioning

confidence: 99%

Estrategias con riego automático para controlar la salinidad en plantas ornamentales en maceta

Illán¹

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Vegetal de la Universidad Politécnica de Cartagena en los proyectos de investigación CICYT "Influencia del manejo del riego con aguas marginales sobre el desarrollo de plantas ornamentales y el medio de cultivo: desarrollo en maceta y en el paisaje urbano" (AGL2011-30022-C02-01 y 02) y "Técnicas de cultivo en arbustos mediterráneos para reducir los efectos negativos del riego con aguas de baja calidad" (AGL2008-05258-CO2-1 y 2). Los resultados de la presente tesis doctoral han sido publicados en:Revistas científicas:  Valdés, R., Miralles, J., Ochoa, J., Sánchez-Blanco, M. J., Bañón, B., 2012. Saline reclaimed wastewater can be used to produce potted weeping fig (Ficus benjamina L.) with minimal effects on plant quality.

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Pourthru: A Method for Monitoring Nutrition in the Greenhouse

Cited by 57 publications

References 0 publications

Nitrogen and Potassium Concentrations in the Nutrients Solution for Melon Plants Growing in Coconut Fiber without Drainage

Nitrogen and Potassium Concentrations in the Nutrients Solution for Melon Plants Growing in Coconut Fiber without Drainage

Manejo da solução nutritiva sobre a qualidade pós-colheita de tomate salada fertirrigado em areia

Estrategias con riego automático para controlar la salinidad en plantas ornamentales en maceta

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