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http://dx.doi.org/10.12791/KSBEC.2017.26.3.158

Improvement of Tomato Seedling Quality under Low Temperature by Application of Silicate Fertilizer  

Vu, Ngoc-Thang (Faculty of Agronomy, Vietnam National University of Agriculture)
Tran, Anh-Tuan (Faculty of Agronomy, Vietnam National University of Agriculture)
Le, Thi-Tuyet-Cham (Faculty of Agronomy, Vietnam National University of Agriculture)
Na, Jong-Kuk (Department of Controlled Agriculture, Kangwon National University)
Kim, Si-Hong (Department of Horticulture, Kangwon National University)
Park, Jong-Man (Department of Horticulture, Kangwon National University)
Jang, Dong-Cheol (Department of Horticulture, Kangwon National University)
Kim, Il-Seop (Department of Horticulture, Kangwon National University)
Publication Information
Journal of Bio-Environment Control / v.26, no.3, 2017 , pp. 158-166 More about this Journal
Abstract
The object of this study was to improve tomato seedling quality in low temperature(below 7, $10^{\circ}C$ during night time or daily mean air temperature was $18^{\circ}C$) by application of silicate fertilizer. Six different silicate fertilizer concentrations (8, 16, 32, 64, 128, and 256mM) or water as the control were applied to tomato seedlings twice a week for 20 days. Positive effects were observed in the growth parameters of the seedlings treated with 16 and 32mM silicate fertilizer; the most effective concentration of silicate at which seedlings showed the best performance was 16mM. However, a high concentration of silicate (256mM) caused negative effects on the growth. The transpiration rate decreased alongside with the increase of silicate concentration up to 32mM, possibly due to the increased stomatal diffusive resistance. Silicate stimulated the growth and development of tomato seedlings, resulting in increased growth parameters and root morphology. However, no significant differences were observed among treatment numbers of soil-drenching wuth the silicate (6, 10, or 20 times with 16mM) for 20 days, suggesting that silicate treatment with 6 times may be sufficient to induce the silicate effects. The application of 16mM of silicate fertilizer reduced relative ion leakage and chilling injury during low temperature storage. In addition, the seedlings treated with silicate fertilizer recovered faster than those without silicate treatment after low temperature storage.
Keywords
chilling injury; ion leakage; low temperature storage; plug seedling; stomatal diffusive resistance;
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