Effect of the Reduction of Nutrient Solution Concentration on Leafy Vegetables Quality Grown in Floating System

Alberici, Adalberto; Quattrini, E.; Penati, Marco Antonio; Martinetti, L.; Gallina, P. Marino; Ferrante, António; Schiavi, M.

doi:10.17660/actahortic.2008.801.142

Cited by 33 publications

(26 citation statements)

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“…In previous studies, 20-50% decrease were reported with decreasing nutrient solution concentrations in rocket (Vernieri et al, 2005;Alberici et al, 2008;Duyar and Kılıç, 2016), spinach (Cocetta et al, 2007;Alberici et al, 2008) and lettuce (Alberici et al, 2008). Alberici et al (2008) experimented 50% and 25% reduced macro elements as compared to control (100%) and reported varying decreases in yields of spinach, rocket and lettuce and recommended 25% reduction in micro nutrients. However, in our study full dose and half dose treatments were placed in the same statistical group.…”

Section: Discussionmentioning

confidence: 89%

“…Plant development data also revealed that besides nutrient solution concentrations, indoor temperatures of the growing periods influenced plant growth and development (Alberici et al, 2008). High temperatures of the 2 nd period (average 19.8°C) stimulated plant development (Alberici et al, 2008;Eşiyok, 2012).…”

Section: Discussionmentioning

confidence: 98%

“…High temperatures of the 2 nd period (average 19.8°C) stimulated plant development (Alberici et al, 2008;Eşiyok, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Thus in this case, potential use and efficiency of Hoagland nutrient solution in leaf edible vegetables are arguable issues. It was also considered that element contents of Hoagland prescription was higher than the prescriptions adapted for leaf edible vegetables and had quite much nutrient contents in post-harvest residues with potential environmental pollution (Alberici et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Besides, spinach is a vegetable with a high nutritional value (Ko et al, 2014) The present study was conducted to investigate the potential use of floating hydroponic culture for spinach production in unheated greenhouses in winter-early spring periods (1). Since there are not any species-specific nutrient solution prescription, availability of a nutrient solution other than Hoagland nutrient solution (winter nutrient solution prepared for lettuce) for spinach culture was also investigated in this study (2).…”

Section: Introductionmentioning

confidence: 99%

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GROWING SPINACH (Spinacia oleracea L.) IN A FLOATING SYSTEM WITH DIFFERENT CONCENTRATIONS OF NUTRIENT SOLUTION

Özteki̇n¹,

Uludag²,

Tüzel³

2018

Appl. Ecol. Env. Res.

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Abstract. This study was conducted in a greenhouse in Izmir/Turkey during the winter-early spring of 2016-2017, on spinach grown in the floating water culture system. Cultivation was carried out in aerated nutrient solutions on seedling trays, and peat was used as germination and rooting medium. Each seed was inserted to each hole (17 cc) in trays with 210 cells (957 plant m -2). Following germination in the germination chamber, trays were moved to climate controlled greenhouse. After emergence, the seedlings were transferred to water culture on 07.12.2016 and 10.03.2017 for the 1 st and 2 nd period, respectively. The nutrient solution was applied as "full dose" (mg L 02), "half dose" (with macro elements reduced by 50%) and "without nutrients" (water). Plants as baby leaves were harvested 3 times in both periods. Results showed that plant growth, yield, quality, and water consumption vary depending on the concentration of nutrient solution as well as the temperature during the growing season. Especially in the 2 nd period when the temperatures were higher, plant water consumption and yield increase and earliness were achieved. It was observed that as the concentration of nutrient solution decreased, vitamin C, leaf Ca content and pH value of the nutrient solution increased while leaf N, P, K and Fe contents, EC value of the nutrient solution, leaf nitrate content, yield and plant biomass decreased. There was no statistical difference between full and half dose applications in many measured parameters. It is concluded that spinach can be grown as a baby leaf in a floating water culture and that in addition to reducing nitrate content, half-dose application may be preferred in terms of yield and water consumption, and production should be done during early spring season in greenhouse conditions for high yield and quality.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 98%

“…High temperatures of the 2 nd period (average 19.8°C) stimulated plant development (Alberici et al, 2008;Eşiyok, 2012).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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GROWING SPINACH (Spinacia oleracea L.) IN A FLOATING SYSTEM WITH DIFFERENT CONCENTRATIONS OF NUTRIENT SOLUTION

Özteki̇n¹,

Uludag²,

Tüzel³

2018

Appl. Ecol. Env. Res.

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Controlled root‐zone temperature effect on baby leaf vegetables yield and quality in a floating system under mild and extreme weather conditions

et al. 2021

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BACKGROUND A floating system is a suitable low‐cost hydroponic method for growing baby leaf vegetables. Among other, an important characteristic of the system is the use of large volume of nutrient solution which is characterized by high heat capacity. The aim of this study was to evaluate the effect of different root‐zone temperatures on baby leaves of lettuce and rocket plants grown in a floating system under mild (spring) or extreme environmental conditions (summer and winter). RESULTS Root‐zone temperature was recorded in two tanks, one powered by a photovoltaic system and one where root‐zone temperature was not controlled – this was used as a control tank. Photosynthetic parameters, yield, nutritional quality, and mineral composition were determined. In both baby leaf vegetables, during extreme weather conditions, yield was higher in the tanks with controlled root‐zone temperature conditions than the control (+18.9% for rocket, and + 31.4% for baby lettuce), while quality parameters and chemical composition were not significantly affected. Stomatal conductance and net photosynthesis values were positively affected only during summer. On the other hand, control of root‐zone temperature under mild weather conditions had no significant effect on baby lettuce and rocket. CONCLUSION Control of the root‐zone temperature could be a useful tool to improve productivity for baby lettuce and rocket crops cultivated in floating systems under extreme weather conditions. © 2020 Society of Chemical Industry

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Macronutrient deprivation eustress elicits differential secondary metabolites in red and green‐pigmented butterhead lettuce grown in a closed soilless system

et al. 2019

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BACKGROUND Through precise control of the nutrient solution (NS), closed soilless systems enable targeted manipulation of plant secondary metabolites, which constitute health‐promoting components of the human daily diet. A nutrient film technique (NFT) system was employed to assess the effect of NS macronutrient‐based concentration (full, half‐, and quarter‐strength corresponding to electrical conductivity (EC) of 1.5, 0.75, and 0.5 dS m−1) on the bioactive profile of red and green‐pigmented Salanova® butterhead lettuce. RESULTS Half‐strength NS reduced fresh biomass of both cultivars by 14%, whereas quarter‐strength NS reduced the fresh biomass of green and red Salanova by 24% and 38%, respectively. However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS. CONCLUSIONS Nutritional eustress and appropriate cultivar selection are effective means to increase phytochemical content and optimize year‐round production of lettuce in closed soilless systems. © 2019 Society of Chemical Industry

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Effect of the Reduction of Nutrient Solution Concentration on Leafy Vegetables Quality Grown in Floating System

Cited by 33 publications

References 0 publications

GROWING SPINACH (Spinacia oleracea L.) IN A FLOATING SYSTEM WITH DIFFERENT CONCENTRATIONS OF NUTRIENT SOLUTION

GROWING SPINACH (Spinacia oleracea L.) IN A FLOATING SYSTEM WITH DIFFERENT CONCENTRATIONS OF NUTRIENT SOLUTION

Controlled root‐zone temperature effect on baby leaf vegetables yield and quality in a floating system under mild and extreme weather conditions

Macronutrient deprivation eustress elicits differential secondary metabolites in red and green‐pigmented butterhead lettuce grown in a closed soilless system

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