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Characterization of Symptom and Determination of Tissue Critical Concentration for Diagnostic Criteria in 'Maehyang' Strawberry (Fragaria$\times$ananassa Duch.) as Influenced by Magnesium Concentrations in the Fertigation Solution  

Choi, Jong-Myung (Division of Hort. & Landscape Architecture, Paichai University)
Jeong, Suck-Kee (Chungchongnam-do Agricultural Research and Extension Services)
Yoon, Moo-Kyung (Vegetable Research Division, National Horticultural Research Institute, RDA)
Publication Information
Journal of Bio-Environment Control / v.17, no.3, 2008 , pp. 238-245 More about this Journal
Abstract
This study was carried out to investigate the effect of magnesium (Mg) concentrations in nutrient solution on growth of and nutrient uptake by 'Maehyang' strawberry. Tissue analysis based on dry weight and petiole sap were also conducted to determine the threshold level in plants when Mg deficiency disorders developed in strawberry plants. In the Mg deficient plants, the spotted yellowing or yellowing area developed on the interveinal area of mature leaves. The dark brown color also developed on the interveinal area of mature leaves with marginal browning or marginal necrosis. The response in dry weight production of 'Maehyang' strawberry to elevated Mg concentrations in nutrient solution was quadratic and the equation is y=6.84+1.7533x-$0.9278x^2$ $(R^2=0.1081^{***})$. But the Mg contents in tissue increased lineally with the equation of y=0.1764+0.1275x $(R^2=0.8307^{***})$. The trends of fresh weight production and Mg concentrations in petiole sap were also quadratic (y=24.127+7.3565x-$1.125x^2$, $R^2=0.2314^{^***}$) and linear (11.954+5.793x, $R^2=0.6869^{***}$), respectively. To prevent growth suppression, the Mg concentrations based on dry weight of above ground tissue and in petiole sap should be in the range of 0.30 to 0.65% and 19 to $40mg{\cdot}kg^{-1}$, respectively, fer the commercial production of 'Maehyang' strawberry.
Keywords
magnesium; deficiency symptom; petiole sap; strawberry; tissue content;
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Times Cited By KSCI : 1  (Citation Analysis)
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