INFLUENCE OF SUPPLEMENTARY LIGHTING WITH HIGH PRESSURE SODIUM AND LED LAMPS ON GROWTH, YIELD AND PHOTOSYNTHETIC ACTIVITY OF STRAWBERRY PLANTS
Journal Title: Proceedings of Electrotechnical Institute Prace Instytutu Elektrotechniki - Year 2015, Vol 62, Issue 268
Abstract
The objective of the study was to evaluate the physiological response and growth of strawberry plants grown under different light treatment. During cultivation period (February-May), the plants (two cultivars: ‘Elsanta’, ‘Grandarosa’) received supplemental artificial lighting provided by standard high-pressure sodium lamps or high-power solid-state lighting modules with red, blue and far red LEDs. Quantum irradiance in the both combinations was maintained at the same level. The third group of plants (control combination) was grown under the natural light (without supplemental lighting). The following measurements were taken: photosynthetic rate, leaf greenness index (relative chlorophyll content), fruit yield and the most important morphological parameters (fresh weight of plant organs, leaf surface area, crown diameter). The results showed that supplemental illumination using LED light source affected photosynthesis (higher rates), growth (higher foliage weight and area) and productivity of ‘Grandarosa’ strawberry plants. On the opposite, no significant effect of supplemental artificial lighting on performance of ‘Elsanta’ plants was recorded. The obtained results showed that LED lamps could be used in greenhouse lighting systems. However, much work still has to be done to optimize lighting spectrum of LED modules for the cultivation of the specific crop species and cultivars.
Authors and Affiliations
Krzysztof Klamkowski, Waldemar Treder, Agnieszka Masny
Keywords
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