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http://dx.doi.org/10.12791/KSBEC.2017.26.2.56

Seedling Qualities of Watermelon as Affected by Different Raising Seedling Period and Growth Characteristics after Planting  

Ko, Ba-Ul (Department of Horticulture Industry, Wonkwang University)
Bae, Jong Hyang (Department of Horticulture Industry, Wonkwang University)
Hwang, Seung Jae (Department of Horticulture, Division of Applied Life Science, Graduate School, Gyeongsang National University)
Kim, Ho Cheol (Department of Horticulture Industry, Wonkwang University)
Publication Information
Journal of Bio-Environment Control / v.26, no.2, 2017 , pp. 56-63 More about this Journal
Abstract
This study was carried out to establish qualities of watermelon seedling (Citrullus lanatus) according to raising seedling period (RSP; 40, 45, 50, 55, 60, and 65 days) and was carried out to investigate growth characteristics after planting of the seedlings. In seedling qualities according to RSP, Plant height, stem diameter, leaf area of seedling with RSP 65 treatment were significantly increased. Fresh and dry weight in the above of corp showed a significant difference among the seedlings with RSP 40-45, RSP 50-60 and RSP 65 treatment, and that in of root were significantly higher in the seedlings with RSP 40, 45, 65 treatments than with other RSP treatments. S/R ratio was lower in the seedlings with RSP 40 and 45 treatments than with other RSP treatments. RSP affected to the leaf area and S/R ratio of seedling. After 11 weeks after planting of a various seedlings, except that height and node number of plant with 45 RSP treatment was lower than other RSP treatments, other growth characteristics were not significantly different amon RSP treatments. Leaf area, fresh weight, dry weight and S/R ratio were lowest in plant with RSP 65 treatment. Relative growth rate and net assimilation rate of planted watermelon tended to decrease and leaf area ratio was continuously increased until 9th week in the all treatments. The lighter and heavier fruit were produced in plants with RSP 40 and RSP 65 treatments (9.7 kg and 9.9 kg) and in RSP 50 and RSP 55 treatments (both 11.0kg), respectively. Fruit sugar contents was highest in fruit with RSP 45 treatment, and was lowest in RSP 50 and RSP 60 treatments. RSP showed a polynomial regression relation with the increment of fruit weight and the weight of harvested fruit. Considering the increment and weight of fruit, the most for RSP of watermelon seedling for planting were 50-55 days.
Keywords
leaf area ratio; net assimilation rate; relative growth rate;
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