Simulation of Light Environment With Fluorescent Lamps and Design of a Movable Light Mounting Fixture in a Growing Room

Fang, Wenrao; Jao, Ruey-Chi

doi:10.17660/actahortic.1996.440.32

Cited by 7 publications

(3 citation statements)

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“…Optimal levels of these factors for a particular crop vary and are closely interrelated. Light is a significant microclimate factor is, as solar energy is known to greatly affect the rate of photosynthesis and plant productivity [Blom and Ingratta 1984, Fan et al 2008, Zoratti et al 2014]. The plant photosynthetic efficiency increases along the increase of light intensity from the compensation point to the light satura-tion point.…”

Section: Introductionmentioning

confidence: 99%

“…Recent technological achievements involving LEDs allow to adjust light quality to the needs of specific plants cultivated. Some researchers have indicated that the use of a single red or blue LED light source or their combination could improve the efficiency of photosynthesis to promote plant production and regulate morphogenesis [Fang and Jao 1996, Ding et al 2005, Xiao et al 2013]. Greenhouse industry is seeking efficient and cost-effective artificial light sources with optimal spectral characteristics for the plant grown.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Supplemental Assimilation Lighting With HPS and Led Lamps on the Cucumber Yielding and Fruit Quality in Autumn Crop

Kowalczyk

Gajc-Wolska

Bujalski

et al. 2018

Acta Sci.Pol.Hortorum Cultus

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The aim of the study was to evaluate the effect of HPS and LED assimilation lighting and LED interlighting on the yielding and as cucumber fruit quality in autumn cultivation cycle. The possibilities of increasing the density of plants due to the use of LED technology were also assessed. The study was conducted in three compartments: I with HPS top light only; II with top light HPS + 2 line LED interlight, III with 100% LED, top LED + 2 line LED interlight. Light level was in every compartment kept at the level of ~320 µmol m -2 s -1 . PAR. The number and weight of cucumber fruits were investigated. The harvest was carried out every day. To assess the harvest quality for the plants grown in the two terms fruits were then examined for the chemical quality attributes of cucumber fruit, such as the content of total soluble solids (TSS), total sugars (TS), ascorbic acid and nitrate (NO3) P, K and Ca. Another part of fruits was subjected to sensory analysis performed with the scaling method. The cucumber grown in the autumn growing cycle gave higher yield and the quality of fruits produced appeared more balanced for the plants lighted with HPS+LED or 100% LED as compared to the traditional, overhead HPS lighting. The above, together with the results from the rate of buds' abortion assessment seem to legitimate the increase in the cucumber crop density when applying LED lighting.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Supplemental Assimilation Lighting With HPS and Led Lamps on the Cucumber Yielding and Fruit Quality in Autumn Crop

Kowalczyk

Gajc-Wolska

Bujalski

et al. 2018

Acta Sci.Pol.Hortorum Cultus

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show abstract

“…2008 ). Some reports have indicated that the use of a single red or blue LED light source or their combination could improve the efficiency of photosynthesis to promote plant production and regulate morphogenesis (Barta et al 1992 ; Fang and Jao 1996 ; Nhut et al 2003 ; Ding et al 2005 ; Xiao et al 2013 ; Shen et al 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of light-emitting diode supplementary lighting on the winter growth of greenhouse plants in the Yangtze River Delta of China

Guyue

et al. 2016

Bot Stud

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BackgroundThe winter in the Yangtze River Delta area of China involves more than 1 month of continuous low temperature and poor light (CLTL) weather conditions, which impacts horticultural production in an unheated greenhouse; however, few greenhouses in this area are currently equipped with a heating device. The low-cost and long-living light-emitting diode (LED) was used as an artificial light source to explore the effects of supplementary lighting during the dark period in CLTL winter on the vegetative characteristics, early yield, and physiology of flowering for pepper plants grown in a greenhouse without heating. Two LED lighting sets were employed with different light source to provide 65 μmol m−2 s−1 at night: (1) LED-A: red LEDs (R, peak wavelength 660 nm) and blue LEDs (B, peak wavelength 460 nm) with an R:B ratio of 6:3; and (2) LED-B: R and B LEDs at an R:B ratio of 8:1. Plants growth parameters and chlorophyll fluorescence characteristics were compared between lighting treatments and the control group.ResultsPlants’ yield and photosynthesis ability were improved by LED-A. Pepper grown under the LED-A1 strategy showed a 303.3 % greater fresh weight of fruits and a 501.3 % greater dry mass compared with the control group. Plant leaves under LED-A1 showed maximum efficiency of the light quantum yield of PSII, electron transfer rate, and the proportion of the open fraction of PSII centers, with values 113.70, 114.34, and 211.65 % higher than those of the control group, respectively, and showed the lowest rate constant of thermal energy dissipation of all groups. LED-B was beneficial to the plant height and stems diameter of the pepper plants more than LED-A.ConclusionsThese results can serve as a guide for environment control and for realizing low energy consumption for products grown in a greenhouse in the winter in Southern China.

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A Review on Artificial Lighting of Tissue Cultures and Transplants

Fang

Jao

2000

Transplant Production in the 21st Century

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Simulation of Light Environment With Fluorescent Lamps and Design of a Movable Light Mounting Fixture in a Growing Room

Cited by 7 publications

References 0 publications

The Effect of Supplemental Assimilation Lighting With HPS and Led Lamps on the Cucumber Yielding and Fruit Quality in Autumn Crop

The Effect of Supplemental Assimilation Lighting With HPS and Led Lamps on the Cucumber Yielding and Fruit Quality in Autumn Crop

Effects of light-emitting diode supplementary lighting on the winter growth of greenhouse plants in the Yangtze River Delta of China

A Review on Artificial Lighting of Tissue Cultures and Transplants

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