Effect of adding Melatonin and Biochar on some Growth Characteristics of Ocimum Basilicum L. CV. Cinnamon

Abstract

Abstract The study was carried out in one of the fields of the Department of Horticulture and Landscaping at the College of Agriculture / University of Anbar for the growing season 2022 from 31/3 to 1/11 at the geographical location longitude 33.4274 N and latitude 43.3331 east. To study the effect of four levels of melatonin (0, 25, 50, and 75) mmol and four levels of Biochar (0, 250, 500, and 750) gm pot−1, respectively. The experiment was carried out according to a randomized complete block design with three replications. The results showed that melatonin outperformed at the level of 75 mmol in plant height (48.03 cm), stem diameter (5.04 mm), number of branches (5.25 branches plant−1), leaf area (10.56 cm2 leaf−1), number of leaves (129.70 leaf plant−1) and fresh leaves weight. (159.68 gm), the dry weight of the leaf (17.13 gm), and the percentage of dry matter (10.65%). It can conclude that spraying aromatic basil plants with melatonin and adding biochar has improved the growth stimulation of this medicinal crop effectively. Therefore, these materials can be used to stimulate the growth of this crop or other crops.