Optimum Irrigation Interval for the Growth of Phalaenopsis Hybrid Seedling in the Aeroponic System
2010
Lee, D.S., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea | Kwon, O.K., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea | Lee, Y.B., University of Seoul, Seoul, Republic of Korea | Yae, B.W., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea | Lee, Y.R., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea
The irrigation interval and time for the supply of nutrient and water to the plant is important in the aeroponic system. This study was conducted to investigate the effect of irrigation interval on the growth of Phalaenopsis hybrid seedlings in the aeroponic system. Young bare-root plants (four leaves, 16 g in fresh weight) were used for this experiment. The composition of nutrient solution was, in meㆍL-¹, 9 N, 3 P, 4 K, 4 Ca and 2 Mg. The electrical conductivity (EC) and pH of nutrient solution used was 1.2 dSㆍL-¹ and 5.8, respectively. Irrigation intervals were 10, 20, 30, 40, and 50 minute and each irrigation time was 10 minute. The total fresh and dry weight, the number of branched roots, and relative growth rate at the 20 and 30 min. was greater than 10, 40, 50 min. interval. Especially, the fresh weight of roots at 30 min. interval was the highest. Leaf length was the highest at 30 min. interval but there was no difference in leaf width. The amount of water consumed for a month was 0.71 L per plant and it was reduced with increasing irrigation interval. There was no difference in the amount of consumed mineral contents for 15 days except for potassium. Potassium absorbed was the highest at 30 min. irrigation interval. As a result, the optimum irrigation interval was 30 min for the production of Phalaenopsis hybrid seedlings in the aeroponic system.
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