Morphology, yield and quality of greenhouse tomato cultivation with flexible photovoltaic rooftop panels (Almería-Spain)

Aroca-Delgado, Raúl; Pérez-Alonso, José; Callejón-Ferre, Ángel-Jesús; Díaz-Pérez, Manuel

doi:10.1016/j.scienta.2019.108768

Cited by 41 publications

(32 citation statements)

References 42 publications

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“…Drippers of 2 L • hour −1 were located with a distance of 0.5 m in each line of crop. Cultural cropping techniques like pruning, defoliation, guiding and fertigation were applied as usual in a tomato hydroponic cropping system in the area of study [37,25].…”

Section: Crop Conditionsmentioning

confidence: 99%

“…The installation of roof top greenhouse photovoltaic panels in the Southern Eastern area of Spain can be an interesting proposal for farmers, due to the high number of annual solar hours in the area [23][24][25]. The main drawback is that conventional photovoltaic panels are completely or partially opaque in order to maximize solar energy production.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, there is a reduction of the radiation that is available for the crops [2,18]. The reduction of radiation inside the greenhouse due to the photovoltaic panel installation needs to be deeply studied, because it can affect crop growth and yields, mainly in periods when solar radiation is lower [1,25,26].…”

Section: Introductionmentioning

confidence: 99%

“…In South-European greenhouses, structures are usually oriented East-West, being this structure orientation used for most of researchers in studies about photovoltaic energy production [18,24,25,32,33].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, several studies on crop effects of shading caused by roof-top photovoltaic panels have arisen [24,25,35,36]. However, neither of these studies has evaluated simultaneity different shading levels in crops.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Different Levels of Shading in a Photovoltaic Greenhouse with a North–South Orientation

et al. 2020

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Photovoltaic greenhouses have been claimed to be a solution to cover the energy demand of the protected crops sector. Thus, there is a need to know what is the maximum percentage of shading produced by roof-top photovoltaic panels that does not affect crop yields. The present study analyzes the effects of increasing percentages of shading in a greenhouse tomato crop located in the southeast of Spain. For this study, photovoltaic panels have been simulated with opaque sheets located in the roof-top of a north–south oriented greenhouse. Three treatments of top roof shading percentage (15%, 30% and 50%) where studied and compared with the control treatment without shading (0%). During the study, parameters registered were radiation, temperature, pH and electric conductivity of the substrate, crop yields and fruit quality. Results of the analysis show that higher percentages of shading in the roof-top of greenhouses reduce so much available radiation for the crop causing a reduction in the yield and fruit quality, even in Mediterranean areas where radiation is not a limiting factor.

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Section: Crop Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Effect of Different Levels of Shading in a Photovoltaic Greenhouse with a North–South Orientation

et al. 2020

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Assessment of the ground coverage ratio of agrivoltaic systems as a proxy for potential crop productivity

Dupraz

2023

Agroforest Syst

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The yield of crops in both agrivoltaic (AV) and agroforestry (AF) systems is difficult to predict. The shade pattern of an AV system is not typical and is quite different from the one of AF systems. Most countries allow AV systems on croplands only if the crop productivity is maintained (e.g., in France) or slightly reduced, as in Japan and Germany, with 80% and 66% minimum relative yield (RY) required, respectively. I suggest using the Ground Coverage Ratio (GCR: ratio of area of photovoltaic panels to area of land) as an indicator of the crop potential productivity in AV systems. The GCR can easily be computed and controlled for all kinds of AV systems with panels that are either fixed (horizontal, tilted, or vertical) or mobile (on 1- or 2-axis trackers). Here, I provide a synthesis of published data for crop productivity under AV systems. Only publications that provided both the GCR of the system and the crop RYs were included. Measuring RYs requires a reliable non-AV control plot. Several publications were excluded because of doubts regarding the measurements’ validity (e.g., systems that are too small, resulting in strong edge effects, or unreliable control plots). Despite the scattering of results, a clear pattern is evidenced: RYs decrease rapidly when GCRs increase. It appears that a GCR < 25% is required to ensure that most crop RYs stay > 80%. These results are consistent with a recent meta-analysis examining the impact of shade on crops. The use of the GCR criterion to validate AV projects is a simple and cost-effective alternative to the tricky control of crop yields in the fields.

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Light-altering cover materials and sustainable greenhouse production of vegetables: a review

Maier

Chavan

et al. 2021

Plant Growth Regul

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Greenhouse horticulture (protected cropping) is essential in meeting increasing global food demand under climate change scenarios by ensuring sustainability, efficiency, and productivity. Recent advances in cover materials and photovoltaic technologies have been widely examined in greenhouses to improve light transmission and solar energy capture with promoting energy-saving. We review the studies on advanced greenhouse cover materials with variable light transmittance, the effects of which on leaf photosynthesis, physiology, and yield. We provide insights into the potential key biological processes of crops responding to these light changes, specifically light receptors, signal transduction, nutrient biosynthesis pathways (e.g., carotenoids, antioxidant compounds) during fruit development and ripening. A better understanding of greenhouse cover materials with a focus towards energy-efficient cover materials equipped in greenhouse is an opportunity for better yield and higher nutrient products production in vegetables in response to global climate challenges. Interdisciplinary research on the application of novel cover materials in greenhouses and biological investigation of light-induced physiology and nutrient formation in vegetables may promote yield and health attributes for protected cultivation of vegetables with energy use efficiency.

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Morphology, yield and quality of greenhouse tomato cultivation with flexible photovoltaic rooftop panels (Almería-Spain)

Cited by 41 publications

References 42 publications

The Effect of Different Levels of Shading in a Photovoltaic Greenhouse with a North–South Orientation

The Effect of Different Levels of Shading in a Photovoltaic Greenhouse with a North–South Orientation

Assessment of the ground coverage ratio of agrivoltaic systems as a proxy for potential crop productivity

Light-altering cover materials and sustainable greenhouse production of vegetables: a review

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