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Effects of Selenium Supplying Methods on the Growth and Se Uptake of Hydroponically Grown Tomato Plants  

Lee Cheol-Kyu (Damyang-gun Agricultural Development and Technology Center)
Cho Kyung-Cheol (Jeollanamdo Agricutural Research & Extension Service)
Lee Jeong-Hyun (Major in Horticulture, Fac. Of Applied Plant Science, Chonnam Nat'l Univ.)
Cho Ja-Yong (Dept. of Medicinal Resource & Horticulture Development, Namdo Provincial College of Jeonnam)
Seo Beom-Seok (Korea Greenhouse Crop Research Institute)
Yang Won-Mo (Major in Horticulture, Division of Plant Production & Technology, Sunchon Nat'l Univ.,)
Publication Information
Journal of Bio-Environment Control / v.14, no.4, 2005 , pp. 284-288 More about this Journal
Abstract
This study was conducted to clarify the effects of supplying methods of selenium on the growth and Se uptake of hydroponically grown tomato plants. Tomato seeds (Lycopersicum esculentum Mill. cv. Momotaro T-93, Daki Seed Co.) were sown in plug tray with fifty holes, and raised for sixty days. Tomato seedlings transplanted to coco fiber slabs were supplied with the nutrient solutions adjusted to EC $2.3dS{\cdot}m^{-1}$ and pH $5.8\~6.2$ recommended by the Japanese Horticultural Experiment Station. Selenium forms used were inorganic $SeO_2$ (here in after referred to Se) and organic selenium chlenium with sugar fatty acid ester (here in after referred to chelated-Se). 10 ppm selenium solutions were treated to tomato plants with foliar applications, drenching, and foliar application plus drenching. Growth characteristics in terms of plant height, number of leaves, leaf area and chlorophyll content were significantly increased in the plot of foliar application ot Se, and in the plot of foliar application plus drenching of chelated-Se than other plots, respectively. Transported contents of selenium into the tomato fruits were highest as 0.302 ppm in the plot of foliar application plus drenching of chelated-Se. Also, it had tended to be higher in the plot of foliar application plus drenching than in the plots of foliar application or drenching in both of Se and chelated-Se. Foliar application and drenching of organic chelated-Se were effective to produce the functional tomato fruits.
Keywords
drenching; foliar application; functional tomato fruit; organic selenium; selenium form;
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