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Effects of Initial EC Values on Seedling Growth and Utilization of Minerals in Hydroponic Rice Seedling Raising  

김영광 (경상남도농업기술원)
홍광표 (경상남도농업기술원)
정완규 (경상남도농업기술원)
손길만 (경상남도농업기술원)
송근우 (경상남도농업기술원)
강진호 (경상대학교 응용생명과학부)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.48, no.3, 2003 , pp. 200-204 More about this Journal
Abstract
This study was conducted to develop a technology for raising seedlings hydroponically using the bed in which the seedlings grew in nutrient solution without soil. In order to establish the optimum EC value of nutrient solution, six initial EC values (1, 2, 3, 4, 5 dS/m and control) of Yoshida's hydroponic solution were examined. Seedling height and dry weight increased with increasing below EC up to 3.0 dS/m, but showed no significant increase at higher than EC 3.0 dS/m. Nutrient solution with initial EC of 3.0 dS/m was good to be dropped down nearly to 1 dS/m after 15-day seedling culture. But those with initial EC of 4.0 and 5.0 dS/m were judged not appropriate because of high EC value in waste nutrient solution. Utilization efficiency of minerals of nutrient solution and rice endosperm was higher on the whole at initial EC of 2.0-3.0 dS/m. Considering seedling growth and utilization efficiency of supplied nutrient solution, initial EC is judged to be suitable at 3.0 dS/m.
Keywords
Rice; Hydroponic seedlings; EC;
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