Article | 10. 2016 Vol. 34, Issue. 5
Qualities and Early Growth Responses of Paprika Seedlings Grown in High and Low Temperatures

Department of Horticulture Industry, Wonkwang University1
Jeonbuk Agricultural Research and Extension Services2
Institute of Life Science and Natural Resources, Wonkwang University3

2016.10. 719:726


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°C; high temperature, 31°C; and low temperature , 15°C throughout the raising seedling period. At 15°C and 30°C, plant height, stem diameter, fresh weight, dry weight, number of leaves, and seedling leaf area were significantly lower than those at 23°C. At 4 weeks after planting, seedling’s growth characteristics showed a similar pattern. Compared to 23°C, seedlings raised at 15°C and 30°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°C and 31°C were higher than those those at RST of 23°C. At an RST of 15°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°C recovered more quickly than did those raised at 31°C.

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