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http://dx.doi.org/10.7740/kjcs.2013.58.4.393

Growth, Lodging Reduction as Affected by Iprobenfos-metconazole(IPM) in Direct-seeded Rice on Flooded Paddy Field  

Lee, Kyehwan (Central Research Institute of Kyung-Nong Corporation)
Choi, Bongsu (Ministry of Evioronment)
Park, Jonghyun (National Agrobiodiversity Center, NAAS, RDA)
Woo, Sunhee (Department of Crop Science, Chungbuk National University)
Lee, Chulwon (Department of Crop Science, Chungbuk National University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.58, no.4, 2013 , pp. 393-398 More about this Journal
Abstract
Lodging in the direct seeded rice cultivation on flooded paddy is being severe problem due to the lower production and grain quality at ripening stage. This study was conducted to examine the effect of Iprobenfos-metconazole (IPM) treated 50, 40 and 30 days before heading respectively as a plant regulator to reduce the lodging at ripening stage of direct seeding rice cultivation. The culm length treated with IPM, especially the 4th culm internode, was shortened more than with untreated plot, and the most effective time was at 30 days before heading. At 20 days after heading the flag leaves colour showed more greening than in the untreated leaves and the plot with IPM treatment was to be maintained longer compared to the control plot. The Nitrogen concentration of leaves with IPM was lower than in the control plot, and $SiO_2$ contents were higher than in the untreated plot and $SiO_2/N$ ratio was increased more in the IPM plot than in the control plot. The breaking strength of 3rd and 4th culm internode with IPM treatment was higher than in the untreated plot, and the lodging index was reduced in the IPM plot significantly and the field lodging also was reduced. As the results the rice production in the IPM plot was increased more due to be higher ripening ratio and seed grain weight compared to the untreated plot to be occurred the field lodging.
Keywords
culm internode; Iprobenfos-metconazole(IPM); lodging; nitrogen; $SiO_2$; $SiO_2/N$ ratio;
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Times Cited By KSCI : 4  (Citation Analysis)
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