The Effect of Temperature Stress Associated With Different Planting Dates and Levels of Gibberellic Acid on The Growth of Sorghum Spring
Abstract A field experiment was carried out in the experimental field of the Department of Field Crops, College of Agriculture/University of Al-Muthanna during the spring season 2021 to determine the effect of planting dates on some growth characteristics of sorghum. The experiment was applied by arranging the split panels according to the RCBD design and with three replications. The main panels included three planting dates (4/15 ’ 4\5 ’ 3/25) while the secondary panels included gibberellin treatments (0, 100ppm) and the results were as follows: The planting date exceeded the first date 3/25 in the number of days to 75% flowering (97.5 days), the height of the plant (143.74 cm) and the diameter of the stem(2.34 cm) and the number of leaves per plant (8.73 leaves). 75% flowering, giving(92.33) days, plant height (136.55 cm), stem diameter (2.04 cm) and number of leaves (8.10 leaves).