Effect of Foliar Spraying with Triacontanol and Iron Sulfate on the Growth and Flowering of Zinnia

Abstract

The experiment was carried out during the spring season 2022 in the nursery of the Diyala Agriculture Directorate, to study the effect of foliar spraying with Triacontanol and iron on the growth and flowering of the zinnia plant -1, and denoted by Tr0, Tr5, Tr10, and Tr15 respectively, the research was carried out as a factorial experiment (4 × 4) according to the Randomized Compelet Block Design (RCBD), the research steps began by planting seeds in cork dishes containing peat moss On 3/14/2022, one seed was planted in each eye. The results of the experiment were summarized as follows: The foliar spraying with Triacontanol led to a significant superiority in all studied traits, as the concentration exceeded 15 mg.L-1 by recording the best results for the characteristic of plant height (24.71 cm), number of leaves (29.80 leaves. plant-1), and number of branches (7.80 branch. Plant-1), flowering time (21.00 days), inflorescence diameter (99.13 mm), and foliar spraying with iron sulfate led to a signficant superiority in all studied traits, as the concentration exceeded 0.4 g.l-1 by recording the best results for the plant height trait (26.79 cm).), the number of leaves (26.30 leaves.plant-1), the number of branches (7.22 branches.plant-1), the flowering date (23.76 days), and the diameter of the inflorescence (80.01 mm), while the interaction between the foliar spraying with Triacontanol and iron sulfate 1ed to superiority Signficant in all studied traits, as concentration treatment 15 mg.L-1 and 0.4 g.L-1 excelled by recording the best results for the characteristic of plant height (30.35 cm), number of leaves (30.90 leaves. plant-1), and number of branches (8.00 branches). Plant-1), flowering time (18.00 days), and inflorescence diameter (110.00 mm).