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http://dx.doi.org/10.12972/kjhst.20160075

Qualities and Early Growth Responses of Paprika Seedlings Grown in High and Low Temperatures  

Cho, Yun-Hee (Department of Horticulture Industry, Wonkwang University)
Kim, Chi-Seon (Jeonbuk Agricultural Research and Extension Services)
Kim, Jeong-Man (Jeonbuk Agricultural Research and Extension Services)
Ku, Yang Gyu (Department of Horticulture Industry, Wonkwang University)
Kim, Ho Cheol (Department of Horticulture Industry, Wonkwang University)
Publication Information
Horticultural Science & Technology / v.34, no.5, 2016 , pp. 719-726 More about this Journal
Abstract
The effect of high and low temperatures on seedling quality while raising of paprika (Capsicum annuum L.) seedlings, and their early development after planting was investigated. The control raising seedling temperature (RST) was $23^{\circ}C$; high temperature, $31^{\circ}C$; and low temperature, $15^{\circ}C$ throughout the raising seedling period. At $15^{\circ}C$ and $30^{\circ}C$, plant height, stem diameter, fresh weight, dry weight, number of leaves, and seedling leaf area were significantly lower than those at $23^{\circ}C$. At 4 weeks after planting, seedling's growth characteristics showed a similar pattern. Compared to $23^{\circ}C$, seedlings raised at $15^{\circ}C$ and $30^{\circ}C$ had an increased dry weight and leaf area per unit time after planting than during the seedling raising period. At 4 weeks after planting, crop growth rate and leaf area index were unaffected by RST, and relative growth rate and net assimilation rate at RSTs of $15^{\circ}C$ and $31^{\circ}C$ were higher than those those at RST of $23^{\circ}C$. At an RST of $15^{\circ}C$, growth speed and net assimilation rates were higher after planting than before planting, according to increased photosynthetic rate. Thus, high and low temperatures during the seedling raising period significantly reduced seedling growth and plant growth after planting. After planting, seedlings raised at $15^{\circ}C$ recovered more quickly than did those raised at $31^{\circ}C$.
Keywords
crop growth rate; recovery; relative growth rate; photosynthetic rate;
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Times Cited By KSCI : 2  (Citation Analysis)
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