Evaluating the experimental cultivation of peppers in low‐energy‐demand greenhouses. An interdisciplinary study

Kavga, Angeliki; Strati, Irini F.; Sinanoglou, Vassilia J.; Fotakis, Charalambos; Sotiroudis, Georgios; Christodoulou, Paris; Zoumpoulakis, Panagiotis

doi:10.1002/jsfa.9246

Cited by 28 publications

(14 citation statements)

References 43 publications

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“…are not affected by the shading of solar panels on the greenhouse roof. Moreover, tests with PV panels on the greenhouse roof (20%) in pepper cultivation have been described in [42]. These authors concluded that the quality of the pepper fruit is not affected.…”

Section: -Average Photosynthesis Rate At Plant Levelmentioning

confidence: 99%

Simulation of Radiation and Crop Activity in a Greenhouse Covered with Semitransparent Organic Photovoltaics

et al. 2020

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A solution to the problem of reduction of available photosynthetically active radiation (PAR) due to the cover with conventional opaque photovoltaics (PV) of greenhouses is the use of semitransparent PV. The question is how dense the semitransparent PV should be and how dense the coverage should be in order not to burden plant growth. The present paper assesses the effect of the use of semitransparent organic photovoltaics (OPV) on the greenhouse roof cover on the available PAR inside the greenhouse. The method used is to simulate the transmission of radiation through the cover and into the greenhouse with computational fluid dynamics (CFD) using the discrete ordinates (DO) model. Three combinations of OPV/cover that give a normal (perpendicular) transmittance to PAR of 30%, 45%, and 60%, defining the required PV covering, were examined. Then the radiation transmission during eight indicative solar days was simulated. The results are given in terms of available PAR radiation inside the greenhouse and of crop photosynthesis rate, comparing them with the results of a polyethylene cover without OPVs and external conditions. The reduction observed to the mean daily PAR radiation integral for the cases with normal PAR transmittance of 30%, 45%, and 60% in relation to the bare polyethylene (PE) was 77%, 66%, and 52%, respectively while the respective simulated reduction to the daily average photosynthesis rate was 33%, 21%, and 12%, respectively. Finally, the yearly power production from the OPV per greenhouse length meter for the cases with normal PAR transmittance of 30%, 45%, and 60% was 323, 242, and 158 kWh m−1 y−1, respectively. The results of this work could be further used for the optimization of greenhouse design for maximizing the PAR at the crop level.

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Section: -Average Photosynthesis Rate At Plant Levelmentioning

confidence: 99%

Simulation of Radiation and Crop Activity in a Greenhouse Covered with Semitransparent Organic Photovoltaics

et al. 2020

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“…A capsaicina, que é o capsaicinoide majoritário das pimentas C. chinense e C. frutescens, demonstrou ser um potente antioxidante, reduzindo a peroxidação lipídica induzida por ferro (DAIRAM et al, 2008). As oleoresinas analisadas nesse estudo apresentaram valores semelhantes às pimentas da espécie Jalapenho (Capsicum annuum) cultivadas em estufa (424 a 587 µmol TE/g amostra) (KAVGA et al, 2018).…”

Section: Figura 2 Fluorescência Relativa Dos Compostos Analisadosunclassified

“…Observou-se uma relação direta da presença de compostos fenólicos com a atividade antioxidante. Os metabólitos secundários das folhas de T. acutifolius contribuíram de maneira significativa para o potencial dessa atividade, enquanto os compostos fenólicos dos frutos de pimenta apresentaram atividade antioxidante mais baixo, porém de acordo com outros resultados já descritos na literatura e esperados para as pimentas (KAVGA et al, 2018;KONCZAK et al, 2010).…”

Section: Figura 2 Fluorescência Relativa Dos Compostos Analisadosunclassified

Determinação da atividade antioxidante das matrizes vegetais Capsicum chinense, Capsicum frutescens e Tripodanthus acutifolius

Ortolan¹,

Hermes²,

Pedroso³

et al. 2019

RJP

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Radicais livres podem gerar estresse oxidativo e causar danos celulares. O uso de antioxidantes naturais demonstram ser um importante mecanismo para retardar ou inibir esse processo de oxidação. Matrizes vegetais dos gêneros Capsicum e Tripodanthus apresentam metabólitos secundários com atividade antioxidante relatada. Foi avaliada a atividade antioxidante de oleoresinas das pimentas Capsicum chinense e Capsicum frutescens, e do extrato bruto da espécie Tripodanthus acutifolius, através do ensaio Oxygen Radical Absorbance Capacity (ORAC). As oleoresinas de C. chinense e C. frutescens apresentaram valores de 550,210 µmol TE/g amostra e 603,746 µmol TE/g amostra, respectivamente. A espécie T. acutifolius apresentou valores aproximadamente dez vezes superiores (5277,764 µmol TE/g amostra) às oleoresinas. Observou-se uma relação direta da presença de compostos fenólicos com a atividade antioxidante. O ensaio realizado pelo grupo de pesquisas gerou um procedimento operacional interno que pode ser seguido em novas pesquisas de interesse com matrizes vegetais, aprovado para utilização no Parque Científico e Tecnológico Regional da Universidade de Santa Cruz do Sul (TecnoUnisc).

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“…However. photometric and spectroscopic studies of the pepper fruits’ extracts showed decreases in the glass-PV greenhouse ( Kavga et al., 2019 ). The shading net (35% light reduction) was a beneficial tool in the Mediterranean area during the spring-summer season which allowed the adjustment of the light and temperature conditions in greenhouse for pepper resulting in enhancing the yield and antioxidant content ( Caruso et al., 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of photovoltaics shading on the growth of chili pepper in controlled greenhouses

Hassanien

Ibrahim²,

Ghaly³

et al. 2022

Heliyon

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The integration of photovoltaic into a greenhouse has been implemented to maximize the energy output and crop production yield from the same land space. The effect of greenhouse external shading of opaque crystalline silicon photovoltaic (PV) panels at 13-26% of the roof area on the microclimate and growth of Chili pepper Capsicum annuum cv. (omega) was investigated. The PV panels were divided into two arrays (each of 4 PVs) and fixed separately on two external pillars of 4 m height in the Southeast and Northwest directions, respectively. Each array of 4 PVs could be tracked from the East-West direction to North-South. There were two greenhouses, one was used as control without shading and the other had the external shading. The results revealed that the external shading of PV slightly decreased air temperatures (1-2 C) and light intensities (25-40%) but had no effect on the dew point temperatures and relative humidity as compared to the control (unshaded greenhouse). Furthermore, the yield and growth of Chili pepper in the shaded greenhouse was insignificantly higher than that in the unshaded greenhouse. Moreover, the simulation results revealed that the estimated electric energy of photovoltaic panels was 3705 kWh/year at a tilt angle of 25 facing South.

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Evaluating the experimental cultivation of peppers in low‐energy‐demand greenhouses. An interdisciplinary study

Abstract: Covering only a small proportion (ca. 20%) of the greenhouse roof with photovoltaic panels contributes considerably to its energy demands without affecting plant growth and quality. © 2018 Society of Chemical Industry.

Cited by 28 publications

References 43 publications

Simulation of Radiation and Crop Activity in a Greenhouse Covered with Semitransparent Organic Photovoltaics

Simulation of Radiation and Crop Activity in a Greenhouse Covered with Semitransparent Organic Photovoltaics

Determinação da atividade antioxidante das matrizes vegetais Capsicum chinense, Capsicum frutescens e Tripodanthus acutifolius

Effect of photovoltaics shading on the growth of chili pepper in controlled greenhouses

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