The Effect of Spraying Boron, Potassium, and Seaweed Extract on The Nutrient and Chlorophyll Content of Apple Tree Leaves

This study was conducted in the Kassab area in Lattakia to examine the effect of spraying apple trees with marine algae extract, potassium, and boron. It dealt with eight factors: spraying with potassium (0.5%), boron (0.2%), marine algae extract, mixing potassium and boron, potassium and algae, algae, potassium, and boron, and with water only. The complete randomized design was used covering 24 trees with each transaction having 3 trees with one repeater tree. Averages were compared by the GenStat program and the lowest moral extent. The leaf content of nutrients and chlorophyll was significantly affected. The findings showed an increase in the ratios of nitrogen-phosphorus-potassium-calcium-magnesium-boron and total chlorophyll in the leaves. The nitrogen content of the leaves increased significantly by 2.447% when sprayed with marine algae extract for an average of two years compared to 1.63%. The marine algae extract treatment offered the highest phosphorous at 2.447%. The treatment with boron, potassium and marine algae outperformed the others for the two years at 1.203% and 1.293%, respectively. The boron treatment gave a significant effect over the others at 0.551%. The interaction between boron, potassium and marine algae showed remarkable improvement over the rest with the boron content in the leaves reaching 46.21 pm. For leaf chlorophyll content, the mixing treatment of potassium and boron outweighed the rest at 2.22 mg/g compared to the 1.29 mg/g for the control and exceeded that for marine algae extract of 2.30 mg/g while the control had 1.41 mg/kg. Total chlorophyll content for the boron and potassium was highest at 4.25 mg/g compared to the control (2.70 mg/g)