Recently, there has been increasing interest in plant factory where crops can be cultivated under conditions that are not affected by the external environment. Therefore, researches are being actively carried out to cultivate crops by controlling vari...
Recently, there has been increasing interest in plant factory where crops can be cultivated under conditions that are not affected by the external environment. Therefore, researches are being actively carried out to cultivate crops by controlling various environments in plant factory. This study was carried out to investigate the effect of irradiation time and light quality on the growth and quality of leaf mustard known as functional vegetables.
In order to investigate the effects of irradiation time on growth and quality of leaf mustard, irradiation time was controlled 8 hours, 12 hours, 16 hours and 20 hours, respectively. In order to investigate the effects of light quality on growth and quality of leaf mustard, light qualities were controlled red+blue (3:2) LED, red LED, blue LED, white LED and fluorescent lamp.
Photosynthesis rate increased with increasing irradiation time. As a result, the highest shoot fresh weight and dry weight were shown in the treatment of 20hours. Chlorophyll content was high at the treatment of 8hours, 12hours. Carotenoid content was highest at treatment of 12hours. Anthocyanin content was lowest at treatment 8hours. The other treatments showed no significant differences. Sinigrin content increased with increasing irradiation time. The light use efficiency was the highest in the treatment of 20hours.
Red+blue(3:2) LED, red LED, blue LED, white LED and fluorescent lamp used in plant factory. Shoot fresh weight, shoot dry weight were the highest in red+blue LED. The lowest shoot fresh weight and dry weight were shown in the treatment of fluorescent lamp. Also, leaf curling was observed depending on the light quality. The leaf curling was severe in red LED and fluorescent lamp with less blue wavelength. Nitrogen content in leaf was lowest in the treatment of red light and highest in fluorescent lamp. Potassium content was high in the treatment of blue LED and lowest in the treatment of fluorescent lamp. Total carotenoid contents were highest in white LED and lower in red+blue LED. Total anthocyanin contents were highest in blue LED and lower in red LED. Sinigrin content increased in blue LED and red+blue LED, which contained blue wavelengths. Power consumption was highest in fluorescent lamp. Among the LED, Power consumption was the highest in blue LED. The light use efficiency was highest in red+blue LED.