Three-dimensional simulation of light spectrum and intensity within an LED growth chamber

Hitz, Tina; Henke, M.; Graeff‐Hönninger, Simone; Munz, Sebastian

doi:10.1016/j.compag.2018.11.043

Cited by 26 publications

(19 citation statements)

References 19 publications

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“…CompLED (COMPLED Solutions GmbH, Dresden, Germany) designed these LED modules. Hitz et al ( 2019a , b ) described the technical specifics of these speed breeding boxes in detail. Different types of LEDs were combined in four to six channels in each growth module.…”

Section: Methodsmentioning

confidence: 99%

Speed breeding short-day crops by LED-controlled light schemes

et al. 2020

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Key message A simple and rapid speed breeding system was developed for short-day crops that enables up to five generations per year using LED lighting systems that allow very specific adjustments regarding light intensity and quality. Abstract Plant breeding is a key element for future agricultural production that needs to cope with a growing human population and climate change. However, the process of developing suitable cultivars is time-consuming, not least because of the long generation times of crops. Recently, speed breeding has been introduced for long-day crops, but a similar protocol for short-day crops is lacking to date. In this study, we present a speed breeding protocol based on light-emitting diodes (LEDs) that allow to modify light quality, and exemplarily demonstrate its effectiveness for the short-day crops soybean (Glycine max), rice (Oryza sativa) and amaranth (Amaranthus spp.). Adjusting the photoperiod to 10 h and using a blue-light enriched, far-red-deprived light spectrum facilitated the growth of short and sturdy soybean plants that flowered ~ 23 days after sowing and matured within 77 days, thus allowing up to five generations per year. In rice and amaranth, flowering was achieved ~ 60 and ~ 35 days after sowing, respectively. Interestingly, the use of far-red light advanced flowering by 10 and 20 days in some amaranth and rice genotypes, respectively, but had no impact on flowering in soybeans, highlighting the importance of light quality for speed breeding protocols. Taken together, our short-day crops' speed breeding protocol enables several generations per year using crop-specific LED-based lighting regimes, without the need of tissue culture tools such as embryo rescue. Moreover, this approach can be readily applied to a multi-storey 96-cell tray-based system to integrate speed breeding with genomics, toward a higher improvement rate in breeding. Communicated by Henry T. Nguyen.

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Section: Methodsmentioning

confidence: 99%

Speed breeding short-day crops by LED-controlled light schemes

et al. 2020

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“…An existing 3D model of the LED growth chamber [ 54 ] in the modelling platform GroIMP [ 55 ] was used. The virtual LED chamber can be adjusted in its dimensions and the placement of the LED modules and proved to simulate the spectral light distribution with a high accuracy [ 54 ]. The single LED types are defined by their spectral and physical light distribution and total emitted power.…”

Section: Methodsmentioning

confidence: 99%

“…The optical properties of the chamber were not changed from the setting in the original model [ 54 ] as the side wall material was the same. The optical properties of the soybean leaf and the substrate were set in a 5 nm resolution according to measurements from a typical soybean leaf ([ 57 ], Supplementary Materials, Figure S3 ) and peat [ 58 ].…”

Section: Methodsmentioning

confidence: 99%

“…The adjustments of the original model of the virtual LED chamber were location and intensity of the individual LEDs and the location of the LED modules. The intensity of the virtual LEDs were parameterized to emit the same intensity of red and blue light at 80 cm distance as in the experimental treatments ( Supplementary Materials, Figure S4 ) using virtual sensors [ 54 ]. The virtual LEDs were set to emit 25 million rays with a maximum of 50 reflections, ensuring that all rays were absorbed by an object or reflected outside of the virtual chamber before reaching the maximum number of reflections.…”

Section: Methodsmentioning

confidence: 99%

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Modelling of Soybean (Glycine max (L.) Merr.) Response to Blue Light Intensity in Controlled Environments

Hitz

Graeff‐Hönninger

Munz

2020

Plants

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Low photosynthetic photon flux density (PPFD) under shade is associated with low blue photon flux density (BPFD), which independent from PPFD can induce shade responses, e.g., elongation growth. In this study, the response of soybean to six levels of BPFD under constant PPFD from LED lighting was investigated with regard to morphology, biomass and photosynthesis to increase the knowledge for optimizing the intensity of BPFD for a speed breeding system. The results showed that low BPFD increased plant height, leaf area and biomass and decreased leaf mass ratio. Photosynthetic rate and internode diameter were not influenced. A functional structural plant model of soybean was calibrated with the experimental data. A response function for internode length to the perceived BPFD by the internodes was derived from simulations and integrated into the model. With the aim to optimize lighting for a speed breeding system, simulations with alternative lighting scenarios indicated that decreasing BPFD during the growth period and using different chamber material with a higher reflectance could reduce energy consumption by 7% compared to the experimental setup, while inducing short soybean plants.

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“…En la agricultura también se encuentran los LEDs, donde se estudian los diferentes espectros de luz en la estructura y filosofía de la plata para mejorar la producción de horticultura y la eficiencia energética [7].…”

Section: Distance and Light Intensity Smart Lampunclassified

Distance & Light Intensity Smart Lamp = Distancia e intensidad de luz de lampara inteligente

Álvarez

2019

BMA

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This work proposes an electronic system which, adapted to a LED lamp, optimizes the use of electrical energy, improves lighting comfort, etc. All this is possible with the programming of an Ultrasonic Distance Sensor (#28015) through an Arduino Nano Rev. 3. This Arduino, connected to actuators, regulates the intensity of the light depending on the distance between the lamp and the work area. In case an object or a human being approaches or moves away from the lamp, the luminous intensity will increase or decrease in relation to the previously established parameters. In order to achieve this objective, the installation of a breadboard of the proposed system is carried out for its subsequent testing and simulation. Several open source software are also used, such as: Arduino, Fritzing, Inkspace, etc. The Arduino is used to program the brain of the operation, that is, the microcontroller in the arduino platform; Fritzing for the digital assembly in breadboard, its schematic and the PCB (Print Circuit Board), all this of the proposed circuit; and Inkspace for the creation of the components that are not available in the Fritzing. This project combines three technologies, which combined, result in a Distance & Light Intensity Smart Lamp.

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Three-dimensional simulation of light spectrum and intensity within an LED growth chamber

Cited by 26 publications

References 19 publications

Speed breeding short-day crops by LED-controlled light schemes

Speed breeding short-day crops by LED-controlled light schemes

Modelling of Soybean (Glycine max (L.) Merr.) Response to Blue Light Intensity in Controlled Environments

Distance & Light Intensity Smart Lamp = Distancia e intensidad de luz de lampara inteligente

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