Effect of Spraying with Different Types and Concentrations of Auxin and Two Growth Stages of the Date Palm (Al-Sultani cultivar) on the Chemical Traits of the Leaves and the Amount of Yield

Abstract

Abstract The factorial experiment was conducted at the Al-Mahawil palm tree station (20 km north of Babylon province), affiliated with the Horticulture Department/Ministry of Agriculture, to determine the effect of spraying with three types of Auxin (IBA, NAA, and 2,4-D) at two different stages of growth (Al-Hababouk and Al-Kamari) using four concentrations of The Auxin used are (0, 0.5, 1, and 1.5) mg L-1. The first spraying appointment was conducted on April 19, 2023, in the Al-Hababouk stage, with two sprays, with a time difference of two weeks between spray 1 and spray 2. The second spraying appointment was conducted in the Al-Kamari stage on 2023/5/11, with a two-week time difference between spray 1 and spray 2. The results of this study can be summarized as follows: The triple interaction treatment between (growth stage, type of Auxin and their concentrations) achieved a significant effect on the following studied traits (the percentage of carbohydrates and the percentage of nitrogen in the leaves and the percentage of reducing sugars in the fruits), while the trait (Bunch weight) did not respond significantly to the effect of the triple interactions.