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A GDD Model for Super Sweet Corn Grown under Black P. E. Film Mulch  

Lee, Suk-Soon (School of Biotechnology, Yeungnam Univ.)
Yang, Seung-Kyu (School of Biotechnology, Yeungnam Univ.)
Hong, Seung-Beom (Dept. of Oriental Medicine Resources, Asia University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.53, no.1, 2008 , pp. 42-49 More about this Journal
Abstract
GDD models of corn were developed in bare soil, while sweet and super sweet corns are grown under black polyethylene (P. E.) film mulch in Korea. To develop a suitable GDD model under black P. E. film mulch, a super sweet com hybrid "Cambella-90" was planted from 1 April to 30 June in 2003 at the 10-day intervals under black P. E. film mulch and in bare soil. In bare soil the best GDD model was $GDD\;=\;{\sum}[H"+L, where H" was daily maximum temperature but is was substituted for $30^{\circ}C$ - (daily maximum temperature - $30^{\circ}C$) when higher than $30^{\circ}C$ and L' was daily minimum temperature, but it was substituted for $10^{\circ}C$ when lower than $10^{\circ}C$. The same GDD model could be adapted for com grown under black P. E. film mulch, but base temperature was substituted for $9^{\circ}C$. To determine planting date for the scheduled harvests, accumulated GDDs were calculated using 30-year average temperature data during the growing season. Under black P. E. film mulch planting dates were determined by subtracting GDD of the hybrid, $970^{\circ}C$, from accumulated GDD of scheduled harvest dates.
Keywords
GDD model; planting time; harvesting time; black P. E. film mulch; super sweet corn;
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Times Cited By KSCI : 4  (Citation Analysis)
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