Effect of two UV-absorbing greenhouse-covering films on growth and yield of an eggplant soilless crop

Kittas, C.; Tchamitchian, Marc; Katsoulas, Ν.; Karaiskou, P.; Papaioannou, Chryssoula

doi:10.1016/j.scienta.2006.06.018

Cited by 59 publications

(66 citation statements)

References 31 publications

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“…To overcome this problem, various new technologies have been introduced during the last few decades for the production of new greenhouse covering materials that could allow for more efficient climate control within the greenhouse environment, with special interest in optical properties and thermal performance of these materials . Most of these technologies focus on producing greenhouse claddings with light‐manipulating properties, such as photo‐selective films, shading nets, UV‐blocking films and double‐layer films among others, that could minimize energy losses and increase yield without disproportional increase in energy inputs . However, reduction in energy consumption from covering materials is usually associated with reduced light availability to plants, with reduced yields and effects on the end product quality being expected .…”

Section: Introductionmentioning

confidence: 99%

The effect of covering material on the yield, quality and chemical composition of greenhouse‐grown tomato fruit

et al. 2019

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BACKGROUND During the last few decades, greenhouse technology for horticultural crops has focused on retaining optimum conditions within the greenhouse environment that could allow for a compromise between maximum yields and minimum production costs. The aim of this study was to evaluate the effect of three greenhouse covering materials and five harvesting dates on the yield and quality parameters of hydroponically produced tomato fruit, as well as on energy consumption. RESULTS Plants had a higher growth rate at early stages for S‐PE cover material, while differences were minimized at later stages. Tocopherol content was the highest for ID‐PE material and harvesting later than 170 days after transplanting (DAT), while sugar content (fructose and glucose) was the highest for S‐PE material and 157 DAT. Organic acid content was the highest at early harvestings, especially for 7‐PE and S‐PE cover materials, while it exhibited decreasing trends at later harvesting dates. Antioxidant properties showed a varied response to cover materials and harvesting dates, while β‐carotene, carotenoids and chlorophylls were the highest for 7‐PE material. CONCLUSIONS The results showed that both cover materials and harvesting date may affect significantly tomato fruit quality, especially sugar and organic acid contents which are associated with fruit taste, as well as tocopherols which contribute to antioxidant properties and pigments that are associated with fruit ripening and earliness of marketable maturity. © 2018 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

The effect of covering material on the yield, quality and chemical composition of greenhouse‐grown tomato fruit

et al. 2019

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“…On the other hand, an excessive level of UV‐B (> 40 KJ m −2 d −1 ) radiation can damage fruit, vegetables, and herbs . It is theoretically possible to affect the concentration of phenolic substances in plants grown in greenhouses covered in plastic films with special optical properties . This could offer the opportunity of producing plants commercially with increased benefits for human health.…”

Section: Introductionmentioning

confidence: 99%

Use of greenhouse‐covering films with tailored UV‐B transmission dose for growing ‘medicines’ through plants: rocket salad case

et al. 2019

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BACKGROUND The effects of ultraviolet B (UV‐B) radiation on plants are well known and have recently attracted a great deal of attention due to the production of large quantities of secondary metabolites, which are very beneficial for human health. Recent studies have demonstrated the possibility of exploiting UV‐B radiation to induce metabolic changes in fruit, vegetables, and herbs. The role of UV‐B rays in inducing secondary plant metabolites is enhanced by new plastic films, which, as a result of their optical properties, permit the necessary dosage of UV‐B to be transmitted into the greenhouse to stimulate such metabolites without altering the harvest. RESULTS The main goal of the present paper is to demonstrate that, by using a greenhouse plastic film with appropriate transmittance of UV‐B for rocket salad cultivation, it is possible to increase the nutraceutical elements in comparison with the same species grown in absence of such radiation. Tests compared nutritional elements extracted from rocket salad grown under greenhouses covered with several plastic films differing in UV‐B transmittance. We found that rocket salad grown under plastic with 27% UV‐B transmittance exhibited very high luteolin and quercetin content in comparison with rocket salad cultivated under film blocking UV‐B radiation. CONCLUSIONS Our experimental results confirm the possibility of exploiting UV‐B radiation in the correct amounts by appropriate greenhouse plastic covers, to produce natural ‘medicines’ using the plants and to satisfy increasing consumer demand for natural health‐promoting food products. © 2019 Society of Chemical Industry

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“…In studies carried out in Spain, an increase in tomato yield was reported when UV-absorbing films were used (González et al, 2004;Monci et al, 2004). Kittas et al (2006) compared the effect of UV-absorbing films on eggplant (Solanum melongena L.) crop behaviour and production. In the absence of UV radiation eggplants were taller (21%), with a larger leaf area (17%) and produced more marketable fruit yield.…”

Section: Introductionmentioning

confidence: 99%

Effects of a UV-absorbing greenhouse covering film on tomato yield and quality

Papaioannou

Katsoulas

Maletsika

et al. 2012

Span. j. agric. res.

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The effect of blocking the ultraviolet (UV) solar radiation using a UV-absorbing low density polyethylene (PE) film on tomato crop yield and fruit quality was evaluated in a two-year study in two arched roof greenhouses located in Central Greece. The UV-A and UV-B radiation transmission values of the greenhouse covered by the UVabsorbing PE film during the first year were 0.4% and 1.2%, respectively and increased to 0.8% and 1.3% in the 2 nd year, while the respective values in the greenhouse covered by a traditional PE film were 20.7% and 12.5% during the 1 st year and 28.7% and 26.7% during the 2 nd year. Under the UV-absorbing film the number of insect injured fruit was reduced and the marketable yield was similar or higher than that under the common PE film, while fruit quality characteristics (size, shape), nutritional value (ascorbic acid and lycopene) and organoleptic quality (pH, titratable acidity and total soluble solids) were similar under both covering materials. Moreover, the reduction of incoming UV radiation had an appreciable effect on fruit skin color, indicating an effect on pigments other than lycopene.Additional key words: fruit quality; insects; polyethylene; transmission; ultraviolet radiation; UV-stabilizers. ResumenEfectos sobre el rendimiento y la calidad del tomate de un film de cubierta de invernaderos absorbente de UV Se evaluó, en un estudio de dos años, en dos invernaderos a dos aguas ubicados en Grecia Central, el efecto del bloqueo de la radiación ultravioleta (UV) solar, utilizando un film absorbente de polietileno (PE) de baja densidad absorbente de UV, sobre el rendimiento del cultivo del tomate y la calidad del fruto. Los valores de transmisión de la radiación UV-A y UV-B del invernadero cubierto por el film PE absorbente de UV en el primer año fueron 0,4% y 1,2%, respectivamente, y se incrementaron hasta el 0,8% y el 1,3% en el segundo año. Estos valores en el invernadero cubierto por una película tradicional de PE fueron 20,7% y 12,5%, respectivamente, durante el 1 er año y 28,7% y 26,7% durante el segundo año. Bajo la película absorbente de UV se redujo el nú-mero de frutos con heridas producidas por insectos y el rendimiento comercializable fue similar o mayor que bajo la película de PE tradicional, mientras que las características de calidad del fruto (tamaño, forma), el valor nutricional (ácido ascórbico y licopeno) y la calidad organoléptica (pH, acidez titulable y sólidos solubles totales) fueron similares con ambos materiales de revestimiento. Por otra parte, la reducción de la radiación UV entrante tuvo un efecto apreciable en el color de la piel de fruta, lo que indica un efecto sobre otros pigmentos distintos del licopeno.Palabras clave adicionales: calidad de la

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Effect of two UV-absorbing greenhouse-covering films on growth and yield of an eggplant soilless crop

Cited by 59 publications

References 31 publications

The effect of covering material on the yield, quality and chemical composition of greenhouse‐grown tomato fruit

The effect of covering material on the yield, quality and chemical composition of greenhouse‐grown tomato fruit

Use of greenhouse‐covering films with tailored UV‐B transmission dose for growing ‘medicines’ through plants: rocket salad case

Effects of a UV-absorbing greenhouse covering film on tomato yield and quality

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