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Seasonal Mineral Nutrient Absorption Characteristics and Development of Optimum Nutrient Solution for Rose Substrate Culture in a Closed Hydroponic System  

Yang, Eun-Young (Vegetable Research Division, NIHHS, RDA)
Park, Keum-Soon (Seobu Office, KSVS, MIFAFF)
Oh, Jeong-Sim (Dept. of Environmental Horticulture, Univ. of Seoul)
Lee, Hye-Jin (Dept. of Environmental Horticulture, Univ. of Seoul)
Lee, Yong-Beom (Dept. of Environmental Horticulture, Univ. of Seoul)
Lee, Ju-Hyun (Vegetable Research Division, NIHHS, RDA)
Publication Information
Journal of Bio-Environment Control / v.18, no.4, 2009 , pp. 354-362 More about this Journal
Abstract
This study was performed to develop a suitable nutrient solution for standard rose substrate culture in a closed hydroponic system. 1/4, 1/2, 2/3 and 1 strength of the nutrient solution made by Japan National Institute of Vegetable and Tea Science (JNIVT) were supplied. The photosynthesis rate, quality and growth of cut flower were higher in the 1/2 and 2/3 strength of nutrient solution during high and low temperature period. Based on the above results, optimum nutrient solutions (UOS) were composed by nutrientwater (n/w) absorption ratio with 1/2S ($NO_{3^-}N$ 6.8, $NH_{4^-}N$ 0.7, $PO_{4^-}P$ 2.0, K 3.8, Ca 3.0, Mg 1.2, $SO_{4^-}S$ $1.2me{\cdot}L^{-1}$) at high temperature season and 2/3($NO_{3^-}N$ 9.7, $NH_{4^-}N$ 0.8, $PO_{4^-}P$ 2.2, K 5.0, Ca 3.9, Mg 1.5, $SO_{4^-}S$ $1.5me{\cdot}L^{-1}$) at low temperature season. The results of suitability examination showed that the EC level in newly composed nutrient solution (UOS) was more stable than other nutrient solutions due to its large amount of calcium and potassium. The growth of cut flower cultivated with UOS was higher than those of other nutrient solutions. Especially, the yield of cut flowers in UOS nutrient solution increased 1.4 times than that of other nutrient solution treatments. Consequently, the new nutrient solution investigated in this experiment was suitable for rose cultivation in a closed hydroponic system.
Keywords
mineral nutrient uptake; photosynthesis; quality of cut flower; transpiration rate; water use efficiency;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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