Effects of Several Cooling Methods and Cool Water Hose Bed Culture on Growth and Microclimate in Summer Season Cultivation of Narrowhead Goldenray 'Ligularia stenocephala'
2011
Kim, K.D., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Lee, E.H., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea | Kim, W.B., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea | Lee, J.G., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea | Yoo, D.L., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Kwon, Y.S., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Lee, J.N., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Jang, S.W., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea | Hong, S.C., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea
This study was carried out to investigate the effects of several cooling methods such as water hose cooling, mist, fog and control on growth and microclimate, and to develop a simple nutriculture bed for production of fresh leaves of narrowhead goldenaray 'Ligularia stenocephala'. When the root-zone was cooled with 240 L/hr flow rate of 13℃ ground water using water hose, the temperature was lowered approximately by 2 to 3℃ than that of control. The growth of narrowhead goldenaray were favorable in the water hose cooling compared with the other cooling methods. Nutrient culture system having part cool ing effect around plant canopy was developed. The system was composed of 15 cm diameter of water hose on side wall of beds, cooling hose, and expanded rice hull media as organic substrate. When cool water which the temperature changed in the range of 14 to 22℃ diurnally with 240 L/hr of now rate through water hose, the air temperature around canopy and root-zone temperature were dropped by 0.5℃ and 3℃ compared with that of conventional styrofoam bed, respectively. These results showed that newly devised bed system using water hose was simple and economical for the production of high quality narrowhead goldenaray leaves. This system might be practically used both at summer and winter season for the cultivation of narrowhead goldenaray by part cooling or heating around root-zone and plant canopy.
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