The Role of Melatonin, Boron and the Addition of Algae Chlorella Vulgaris in Growth and Yield of Date Palm, (Cv. Al-Sayer) Under Conditions of Environmental Stress

Abstract

The experiment was conducted in the Fadak palm farm located in the desert of Karbala city, where 54 growth-homogeneous date palms, seven years old (Al-Sayer variety), were chosen. Boron (Boric acid) was sprayed at two concentrations (0 and 500 mg/L) three times, and Melatonin was sprayed at three concentrations (0, 50, and 100 mg/L) during three stages. Chlorella vulgaris algae were added to the soil at three concentrations (0, 100, and 200 mL/L) at a rate of five liters per tree five times from January to May with one addition monthly. Spraying Melatonin spraying increased the fruit content of total phenolics and carotenoids, and spraying Boron led to an increase in the fruit maturity percentage and total yield, and the addition of algae led to an increase in phosphorus in the palm leaves. And all additions improved the qualitative and chemical characteristics and the total production of the date palm trees. The experiment aims to determine the effect of Melatonin, Boron, and Chlorella vulgaris algae addition on the growth and production of date palms under conditions of environmental stress.