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Growth and Yield of Rice as Affected by Saline Water Treatment at Different Growth Stages  

이충근 (작물시험장)
윤영환 (작물시험장)
신진철 (작물시험장)
이변우 (서울대학교 농업생명과학대학)
김정곤 (작물시험장)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.47, no.6, 2002 , pp. 402-408 More about this Journal
Abstract
Rice cultivar 'Janganbyeo' was cultivated by irrigating the saline waters of high salinity (3.0%) and medium saliniy (1.5%) for 4 days, and low salinity (0.5%) for 30 days at tillering, early meiosis and heading stage. Leaf injury due to salinity was most severe at tillering stage in 1999, but at heading stage in 2000. Heading date was delayed by 1 to 5 days by treatment of saline waters only at tillering stage. Culm length and panicle length were most severely shortened by treatment at early meiosis stage. Yield and yield components except for panicle number were decreased most by high salinity treatment regardless of growth stages. In particular, ripening ratio and grain weight among the yield components were decreased most conspicuously by the saline water treatment regardless of salinity and growth stage. Regarding grain weight grain-filling rate and duration, there is no remarked difference among the concentrations and treatment durations of saline water at tillering stage. However, their reductions were very different among the concentrations and treatment durations of saline water at early meiosis stage, being greatest when treated with high salinity for 4 days and followed by low salinity for 30 days. Also their reductions were very severe only when treated with high salinity for 4 days at heading stage.
Keywords
rice; sea water; salinity; growth stage; leaf injury; grain-filling rate; salt stress;
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