Research Information System
12th International Congress on Mechanization and Energy in Agriculture (ADAGENG2014), Cappadocia, Nevşehir, Turkey, 3 - 06 September 2014, vol.10, no.2, pp.171-176
Abstract: The use of light emitting diode (LED) assimilation lighting can become an important player in greenhouse horticulture if energy efficient LEDs can increase production. However, before LEDs can be broadly applied in horticulture, more knowledge is necessary on the effects of LEDs on crops. In this research, a flexible LED light source was developed suitable for the research on photobiological responses of plantlets in greenhouses and growth chambers for research and the young plant production. The LED lamp allows the difference wavelength, light intensity and light quality to be controlled as automatic via computer. The components of the LED lamp device include super bright Cool White (6500 K), Red (620-630 nm), Blue (465-485 nm) and UV-A (390-410 nm), LED group mounting fixture and drivers. In each LED group, there are 160 Cool White, 192 red, 32 blue and 16 UV-A LEDs. According to the experimental results of LED lamp at 20 cm distance maximum photosynthetically active radiation (PAR) values of 824.5, 967.7, 173.3, 38.2, 1129.3, 1141.3, 1784.5 μmol.m-2.s-1 were obtained for Cool White, Red, Blue, UV-A, Red-Blue, Red-Blue-UV-A and total of LED groups, respectively.
Key words: Light emitting diode, Horticulture, photosynthetically active radiation, Growth chamber