Improving Sweet Pepper Productivity by Led Interlighting

Jokinen, Kari; Särkkä, Liisa; Näkkilä, Juha

doi:10.17660/actahortic.2012.956.4

Cited by 34 publications

(18 citation statements)

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“…The use of single-spectral blue or red LEDs has resulted in significant improvements in the quality and yield of vegetables and fruits (e.g., cucumber, pepper, and strawberry fruits) when compared with white fluorescent or solar light ( Table 1 ) [ 31 , 82 , 83 ]. Moreover, LED inter-lighting systems (57 W m −2 ) accelerate the fruit maturation process [ 84 ]. Besides single-spectral light, use of mixed red:blue light can also increase the crop yield ( Table 1 ) [ 31 , 34 , 83 , 85 ].…”

Section: Role Of Leds In Increasing Crop Yieldmentioning

confidence: 99%

An Overview of LEDs’ Effects on the Production of Bioactive Compounds and Crop Quality

et al. 2017

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Light-emitting diodes (LEDs) are characterized by their narrow-spectrum, non-thermal photon emission, greater longevity, and energy-saving characteristics, which are better than traditional light sources. LEDs thus hold the potential to revolutionize horticulture lighting technology for crop production, protection, and preservation. Exposure to different LED wavelengths can induce the synthesis of bioactive compounds and antioxidants, which in turn can improve the nutritional quality of horticultural crops. Similarly, LEDs increase the nutrient contents, reduce microbial contamination, and alter the ripening of postharvest fruits and vegetables. LED-treated agronomic products can be beneficial for human health due to their good nutrient value and high antioxidant properties. Besides that, the non-thermal properties of LEDs make them easy to use in closed-canopy or within-canopy lighting systems. Such configurations minimize electricity consumption by maintaining optimal incident photon fluxes. Interestingly, red, blue, and green LEDs can induce systemic acquired resistance in various plant species against fungal pathogens. Hence, when seasonal clouds restrict sunlight, LEDs can provide a controllable, alternative source of selected single or mixed wavelength photon source in greenhouse conditions.

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Section: Role Of Leds In Increasing Crop Yieldmentioning

confidence: 99%

An Overview of LEDs’ Effects on the Production of Bioactive Compounds and Crop Quality

et al. 2017

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“…The smaller crop canopy and lower canopy coverage over the LED inter-lighting system in the late growing season might have reduced inter-light interception, decreasing its beneficial effects (Hao et al 2012). Inter-lighting cultivating sweet pepper plants resulted in increased total marketable yield (by 16%) mainly due to increased fruit number, faster fruit maturation (Jokinen et al 2012). Gomez with co-authors (2013) compared effects of supplemental LED inter-lighting and HPS lamp overhead lighting for greenhouse cultivated tomato yield, but found no productivity differences between two supplemental lighting treatments.…”

Section: Anthocyanin Concentration Increased By 11%mentioning

confidence: 99%

The effects of light-emitting diode lighting on greenhouse plant growth and quality

Olle¹,

Viršilė²

2013

AFSci

410

227

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The aim of this study is to present the light emitting diode (LED) technology for greenhouse plant lighting and to give an overview about LED light effects on photosynthetic indices, growth, yield and nutritional value in green vegetables and tomato, cucumber, sweet pepper transplants. The sole LED lighting, applied in closed growth chambers, as well as combinations of LED wavelengths with conventional light sources, fluorescent and high pressure sodium lamp light, and natural illumination in greenhouses are overviewed. Red and blue light are basal in the lighting spectra for green vegetables and tomato, cucumber, and pepper transplants; far red light, important for photomorphogenetic processes in plants also results in growth promotion. However, theoretically unprofitable spectral parts as green or yellow also have significant physiological effects on investigated plants. Presented results disclose the variability of light spectral effects on different plant species and different physiological indices.

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“…For overhead supplemental lighting, widely spaced, narrow, parallel bars of LEDs perpendicular to the track of the sun across the greenhouse might be the way to go but may not yield very high supplemental light intensities due to low population densities of LEDs along the bars and wide spacing of the bars. For high-wire crops, placement of LEDs along the side or within the foliar canopy compensates for mutual shading of lower leaves by upper leaves to overhead light (Deram et al, 2014;Dueck et al, 2012;G omez et al, 2013;G omez and Mitchell, 2014;Jokinen et al, 2012;Lu et al, 2012;Trouwborst et al, 2010). While some commercial LED arrays are actively heat sinked, others are only passively heat sinked, requiring conductive heat transfer between the fixtures and surrounding air.…”

Section: Distribution Of Solar and Supplemental Lighting In The Greenmentioning

confidence: 99%

Academic Research Perspective of LEDs for the Horticulture Industry

Mitchell

2015

horts

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Following is the invited perspective of an academic researcher and director of a multi-institutional research and education project tasked to test the feasibility of adopting light-emitting diode (LED) technology for application by the commercial horticulture industry. Academics researching basic specialty-crop responses to spectra, intensities, and durations of lighting with LEDs often find technical queries from growers, vendors, and entrepreneurs to go beyond the capabilities and scope of systematic research to answer definitively. Differences between commercial and academic research approaches to LED technology development are noted, including legal obstacles to open collaboration. Early generation commercial LED technology for horticultural applications is based on research begun >20 years ago. The basis for selection of various LED wavebands for inclusion in LED plant growth arrays is presented for both commercial as well as research applications. Advantages of light distribution from LED sources for different crop applications are presented, especially including close-canopy and intracanopy lighting, both of which contribute substantially to energy savings. Challenges to providing accurate LED light prescriptions for different crops are discussed, including those for supplemental lighting as well as for sole-source lighting applications. Anticipated trends are projected for horticultural applications of LED technology, including multispectral, individually adjustable, high-intensity arrays; increasing electrical efficacy of future LEDs; and reduced costs of mass production for particular applications.

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Improving Sweet Pepper Productivity by Led Interlighting

Cited by 34 publications

References 0 publications

An Overview of LEDs’ Effects on the Production of Bioactive Compounds and Crop Quality

An Overview of LEDs’ Effects on the Production of Bioactive Compounds and Crop Quality

The effects of light-emitting diode lighting on greenhouse plant growth and quality

Academic Research Perspective of LEDs for the Horticulture Industry

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