ISHS Acta Horticulturae 711: V International Symposium on Artificial Lighting in Horticulture
INFLUENCE OF LIGHTING LEVELS BY SHADING CLOTHS ON CYCLAMEN PERSICUM QUALITY |
| Authors: | E. Villegas, M. Pérez, M.T. Lao |
| Keywords: | Biomass, leaf area, specific leaf and flower area, plant quality, light intensity, radiation |
| Abstract:
This trial was carried out in an installation with metallic tube structure and covered with black high density polyethylene (HDPE) shade cloth with an area of 800 m2 under Mediterranean climate. The plant studied was Cyclamen persicum. Usually this culture is carried out in summer and therefore it is necessary reduces the external radiation intensities. The aim of this work is to study the influence on Cyclamen persicum quality under different shading clothes. Two trials have been carried out: the first one with black shade cloth of HDPE and two treatments TA (50% of shading and an average of transmitted radiation of 67.3 µmol m-2 s-1) and TB (75% of shading and an average of transmitted radiation of 29.4 µmol m-2 s-1) and the second one with 3 treatments: TC (grey shade cloth HDPE 50% of shading and an average of transmitted radiation of 80.9 µmol m-2 s-1), TD (aluminised shade cloth HDPE 50% of shading and an average of transmitted radiation of 80.3 µmol m-2 s-1) and TE (aluminised shade cloth HDPE 60% of shading and an average of transmitted radiation of 49.8 µmol m-2 s-1). In both trials each treatment had 4 replications and 50 plants per replication. During the trials the climatic parameters were recorded: Temperature, Relative Humidity and PAR radiation. At the end of the trial the quality was valuated by means of the following morphological parameters: number of leaves and flowers, length of petioles and peduncles, fresh and dry weight of different parts of the plant (petioles, peduncles, leaves, flowers, buds and root) and leaves and flowers area. It can be concluded that Cyclamen persicum plants under shade cloths with 50% of shading have better quality and plants under grey shade cloths are more compacted and have more flowers. | |
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