Influence of Doses and Application Methods of Paclobutrazol on Seedling Quality in Cucumber
DOI:
https://doi.org/10.24925/turjaf.v12i11.1908-1913.6950Keywords:
Seedling height, stem diameter, quality, seedling fresh weight, seedling dry weightAbstract
In this study, the effect of different applications of paclobutrazol on seedling quality in cucumber was investigated. In the trial, 30, 40, 50 and 60 ppm doses of paclobutrazol were applied in 2 different amounts (0.5-1.0 ml) and in 2 different ways. The first application was made when the cotyledon leaves were parallel to the ground and no application was made afterwards (1+0). Paclobutrazol was given twice (1+1), the first application being when the cotyledon leaves were parallel to the ground and the second application being when the first true leaves reached 0.5 cm in diameter. In control plots, plants were sprayed with distilled water. Hoagland nutrient solution was modified and used to fertilize the seedlings. The pH of the solution was adjusted to 6.3±2 during the seedling growing period. Seedlings were harvested on the 35th day and observations were made. In the study, seedling height (cm), stem length (cm), stem diameter (mm), number of leaves, seedling fresh weight (g), seedling dry weight (g), root fresh weight (g) and root dry weight (g) were examined. Paclobutrazol applications caused a significant shortening in seedling height and stem length. As the amount of paclobutrazol increased, the decrease in seedling height and stem length continued. In the trial, giving 30 and 40 ppm paclobutrazol as 0.5 ml per seedling and 1+1 application was determined to be the most effective result. No significant relationship was found between paclobutrazol applications and stem diameter. Similarly, no relationship was found between applications and the number of leaves. In conclusion, while paclobutrazol significantly increases seedling quality, it also causes significant declines in seedling quality depending on the application method, application dose and amount.
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