Abstract:

The study was conducted at the Agricultural Research Station of the College of Agriculture / University of Basrah during the growing season 2020-2021 for the purpose of studying the effect of treatment with humic and fulvic acids on palm seedlings of two sexes Washingtonia ia filifera and phoenix canariensis, the ground was added at average of once every two weeks for a period of six months to humic acid at concentrations (0, 10, 15 ml.) and fulvic acid at concentrations (0, 5, 10 g.L-1), and their effect on the chemical traits of seedling leaves was studied. The results of the study showed that humic acids had a significant effect on the chemical properties of seedling leaves, and they caused the improvement of these traits. Humic acid concentration 15 ml.L-1 increased the percentage of nitrogen, phosphorous, potassium, chlorophyll and carbohydrates at average of (2.268, 2.430, 8.72) % 14.14 mg.100 g-1, 4.287 mg 100 g-1 dry weight, respectively. Fulvic acid also has a similar effect on these traits. The triple interaction also had a significant effect on the studied traits, where the interaction between Washingtonia palm and a concentration of 15 ml.L-1 humic acid and 10 g.L-1 fulvic acid gave the highest values in the leaves content of nitrogen, phosphorous, potassium, chlorophyll and carbohydrates at an average of (3.160, 3.320, 11.76). ) %, 18.11 mg.100 g-1, 5.230 mg 100 g-1 dry weight,The Washingtonia palm scored a significantly excelled on the canary palm in the leaves content of nitrogen, phosphorous, potassium and carbohydrate, at average of (1.881, 2.172, 7.82)%, 3.99 mg 100 g-1 dry weight, respectively.

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