| Abstract: | An investigation was carried out to consider the effect of polystimulin-A6 on the growth of beech seedlings. A total of 1200 seedlings treated with Polystimulin-A6 at four different concentrations, and a total of 300 control seedlings, were investigated taking account of height, collar diameter, dry weight, number and size of leaves. The greatest height and collar diameter were found with the treatment Polystimulin-A6 at 200 mg/l. In contrast, the control treatment resulted in the least height and collar diameter. The greatest seedling height measured 52.77 cm at the 200 mg/l level, compared with 38.37 cm for the control seedlings. The greatest root collar diameter measured 16.44 mm with the transplanted seedlings, while the least measured 7.01 mm. with the control seedlings. Also, seedling dry weight, root percentage, number and size of leaves were higher than the control. To conclude, it is obvious that Polystimulin-A6 is very effective and has contributed significantly to the metabolism of Fagus orientalis L. seedlings. According to this study, the application of Polystimulin-A6 to beech seedlings has been recommended for practical use in nursery situations. |
