EFFECTS OF SUPPLEMENTAL LIGHTING USING HIGH PRESSURE SODIUM LAMPS AND LED LAMPS ON SELECTED GROWTH PARAMETERS OF BEDDING PLANTS
Journal Title: Proceedings of Electrotechnical Institute Prace Instytutu Elektrotechniki - Year 2012, Vol 59, Issue 256
Abstract
Rooted cuttings of fuchsia ‘Beacon’ and iresine ‘Shiny Rose’ were cultivated in greenhouse during winter months (November, December). Supplemental lighting was applied from 6 do 18 using High Pressure Sodium Lamps (HPS, 400 W) or LED lamps (DAPLON-plus/2011, model elaborated in Electrotechnical Institute, Warsaw). Lamps were switched off when natural irradiation was higher than 200 W m-2. Control plants were grown in natural light conditions - without supplemantal lighting. For both treatements with supplemental lighting light intensity on plant canopy was 150-190 µmol m-2 s-1. The growth parameters (plant height, branching, fresh and dry weight) were evaluated after 6 weeks of cultivation in greenhouse. Obtained results showed that both bedding plants iresine and fuchsia grown with LED lamps were more compact, with shorter side shoots and with lower leaf area. Fresh and dry weight of iresine and fuchia were the highest in conditions with HPS lamps. According to expectations the control plants, grown without supplemental lighting, had significantly shorter stems with less side shoots, the lowest fresh and dry weights and the lowest leaf area. Plants grown with supplemental ligting using HPS and LED lamps had higer chlorophyll content in leaves (expressed as CCM and SPAD values), comparing to control plants.
Authors and Affiliations
Jadwiga TREDER, Krzysztof KLAMKOWSKI, Waldemar TREDER, Andrzej PUTERNICKI, Edmund LISAK
Keywords
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- EP ID EP187921
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