Optimal Cultivar Selection of Kohlrabi for Hydroponics Culture in a Closed-type Plant Factory System
2017
Uoon, C.I., Jeju National University, Jeju, Republic of Korea | Cha, M.K., Jeju National University, Jeju, Republic of Korea | Jeon, Y.A., Jeju National University, Jeju, Republic of Korea | Cho, Y.Y., Jeju National University, Jeju, Republic of Korea
Plant factory can control artificially the environments for crop cultivation, so they can produce high quality agricultural products all year round. This study was carried to select suitable kohlrabi cultivar for hydroponics in a closed-type plant factory system. We used three cultivars of red kohlrabi, 'Asac kohl', 'Kolibri', and 'Purple king' as plant materials. The artificial light source was LED light, light intensity and photoperiod were 249 micro moleㆍm-2ㆍs-1 and 12/12 hours (day/night period), respectively. Hydroponic cultivation type was used circulating deep flow technique. At 43 days after transplanting, fresh weight of whole plant and tuber and leaf area were not significantly different among cultivars. Shoot dry weight and tuber dry weight were highest in 'Asac kohl' cultivar, and number of leaves was highest in 'Purple king' cultivar. Sugar content and yield were highest in 'Asac kohl' cultivar. Considering the growth and marketable yields, 'Asac kohl' was the optimal kohlrabi cultivar for hydroponic cultivation in a closedtype plant factory system.
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