Effect of EC Levels in Nutrient Solution on the Growth of Juvenile Rose in Hydroponics Using Coir Substrate
2012
Choi, G.L., Protected Horticulture Research Station, National Institute of Horticultural and Herbal Science, Busan, Republic of Korea | Cho, M.W., Protected Horticulture Research Station, National Institute of Horticultural and Herbal Science, Busan, Republic of Korea | Cheong, J.W., Protected Horticulture Research Station, National Institute of Horticultural and Herbal Science, Busan, Republic of Korea | Rhee, H.C., Protected Horticulture Research Station, National Institute of Horticultural and Herbal Science, Busan, Republic of Korea | Kim, Y.C., Protected Horticulture Research Station, National Institute of Horticultural and Herbal Science, Busan, Republic of Korea | Roh, M.Y., Rural Development Administration, Suwon, Republic of Korea | Kang, Y.I., National Institute of Horticultural and Herbal Science, RDA, Suwon, Republic of Korea
This study was carried out to investigate the effect of EC levels in nutrient solution on the growth of rose in coir substrate during the juvenile. Nutrient concentration were EC 0.6, 1.0, 1.4, and 1.8 dSㆍm-¹. In spite of high concentration of nutrient solution was supplied, EC and inorganic ions content in the extract of substrate was no difference by 22 days after planting. After that, they was rapidly increased with higher concentration of nutrient solution. Number of shoot was highest in EC 1.8 dSㆍm-¹ at 2nd growth cycle, 90 days after planting, after that was showed a tendency to increase with increasing nutrient concentration, but was no significant difference among treatment except EC 0.6 dSㆍm-¹. Judging by results of growth of rose and contents of inorganic ion in extracts of media, our experiment suggests that the suitable nutrient concentration is EC 1.8 dSㆍm-¹ until 90 days and then EC 1.4 dSㆍm-¹ until 165 days after planting that is more higher than conventional nutrient concentration for absorption by coir.
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