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Effect of Soil Salinity and Flooding on Plant Growth and Yield of Rape-Castor Bean Cropping System in the Newly Reclaimed Tidal Land of Western Seaside of Korea  

Sohn, Yong-Man (Rural Research Institute. KARICO)
Jeon, Geon-Yeong (Rural Research Institute. KARICO)
Song, Jae-Do (Rural Research Institute. KARICO)
Lee, Jae-Hwang (Rural Research Institute. KARICO)
Park, Moo-Eon (Rural Research Institute. KARICO)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.42, no.5, 2009 , pp. 355-363 More about this Journal
Abstract
Double cropping system of oilseed crops introduced rape and castor bean was studied in the newly reclaimed tidal land of Korea. Surface soil EC to reach at 50% of growth reduction to the tallest height of crops was estimated $4dS\;m^{-1}$ for castor bean and $6dS\;m^{-1}$ for rape by logarithmic function. The castor bean cultivated during rainy summer much more suffered serious growth and yield reduction by flooding damage in the Hwaong and Yeonsangang reclaimed lands having low soil conductivity and finer textured soil than in the Iweon reclaimed land having higher soil conductivity and coarse sandy textured soil. Rape cultivated during dry winter-spring much more suffered serious growth and yield reduction by high soil salinity come from re-salting process. 50% yield reduction was estimated at $2.0\;2.5dS\;m^{-1}$ of surface soil EC by logarithmic function. Consequentially, it was concluded that oilseed production for energy by double cropping system of rape and castor bean might be possible under good controling soil salinity below $4dS\;m^{-1}$ for castor and $3dS\;m^{-1}$ for rape in the newly reclaimed land of Korea.
Keywords
Reclaimed tidal land; Soil salinity; Rape; Castor bean;
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Times Cited By KSCI : 1  (Citation Analysis)
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