Abstract
The experiment was carried out in the College of Agriculture - University of Karbala at the beginning of September of the year 2022 according to a randomized complete block design to study the effect of the bacterial biofertilizer Azotobacter and a solution of gibberellic acid in three concentrations (0, 150 and 300 mg. L-1), and kinetin in three concentrations (0, 25 and 50 mg. L-1) in some biochemical characteristics of Psidium guajava L. seedlings. The results showed that the single effect of the bacterial biofertilizer was superior in the all studied characteristics compared to the control treatment, as for the gibberellic acid solution, the concentration (300 mg.L-1) was superior by giving it the highest significant increase in all the studied traits except for the activity of the peroxidase enzyme compared to the control treatment, while the treatment of seeds with chitin solution excelled, and the concentration (50 mg.L-1) recorded the highest significant difference in all the studied traits in the all studied characteristics compared to the control treatment.
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