University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 36 1 2026 04 20 The effect of different amounts of Lemna minor compost and putrescine on some vegetative and physiological characteristics of Hyacinthus orientalis The effect of different amounts of Lemna minor compost and putrescine on some vegetative and physiological characteristics of Hyacinthus orientalis 101 115 21411 10.22034/saps.2024.60903.3195 FA Mahnaz Karimi Department of Horticultural Sciences, Faculty of crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Setare Sadeqinasab Dept. of Horticultural Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Hosein Moradi Dept. of Horticultural Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Journal Article 2024 03 13 <strong>Background & Objectives:</strong> The use of organic and readily available compounds is effective in reducing harmful environmental effects and reducing the cost of product production. The purpose of this research was to investigate the role of compost obtained from <em>Lemna minor</em> and polyamine putrescine in improving the vegetative and physiological characteristics of Iranian hyacinth.<br /><strong> </strong><br /><strong>Materials and Methods:</strong> The experiment was conducted as a factorial in a completely randomized design in four replications. The first factor was compost (0, 25, 50 and 75% replacing peat moss in the control media) and the second factor was different concentrations of putrescine (0, 1 and 2 mM). The control treatment was a combination of peat moss and perlite (2:1 V/V).<br /><strong> </strong><br /><strong>Results:</strong> According to the obtained results, the highest number of flowers was recorded in the control tratment, 25% compost without putricin, the control substrate with 2 mM putricin and 75% compost without putricin. The highest number of leaves was observed in control and 1 mM potricin, 75% compost in both 1 and 2 mM potricin. The number of bulblet formed in the control bed, 25% compost in combination with 2 mM putricin and 50% compost in the presence of one and two millimolar putricin was the maximum. The highest amount of carotenoid was recorded in 50% compost in combination with 1 mM potricin. The highest amount of nitrogen in leaves was in 25, 50 and 75% compost combined with 1 mM potricin and 50% compost without potricin.<br /><strong>Conclusion: </strong>Despite the high vegetative and reproductive traits including the number of flowers and leaves in the control, the results of this research showed that compost in different percentages including 50 and 75% and in combination with one and two millimolar putricin improved some hyacinth traits. <strong>Background & Objectives:</strong> The use of organic and readily available compounds is effective in reducing harmful environmental effects and reducing the cost of product production. The purpose of this research was to investigate the role of compost obtained from <em>Lemna minor</em> and polyamine putrescine in improving the vegetative and physiological characteristics of Iranian hyacinth.<br /><strong> </strong><br /><strong>Materials and Methods:</strong> The experiment was conducted as a factorial in a completely randomized design in four replications. The first factor was compost (0, 25, 50 and 75% replacing peat moss in the control media) and the second factor was different concentrations of putrescine (0, 1 and 2 mM). The control treatment was a combination of peat moss and perlite (2:1 V/V).<br /><strong> </strong><br /><strong>Results:</strong> According to the obtained results, the highest number of flowers was recorded in the control tratment, 25% compost without putricin, the control substrate with 2 mM putricin and 75% compost without putricin. The highest number of leaves was observed in control and 1 mM potricin, 75% compost in both 1 and 2 mM potricin. The number of bulblet formed in the control bed, 25% compost in combination with 2 mM putricin and 50% compost in the presence of one and two millimolar putricin was the maximum. The highest amount of carotenoid was recorded in 50% compost in combination with 1 mM potricin. The highest amount of nitrogen in leaves was in 25, 50 and 75% compost combined with 1 mM potricin and 50% compost without potricin.<br /><strong>Conclusion: </strong>Despite the high vegetative and reproductive traits including the number of flowers and leaves in the control, the results of this research showed that compost in different percentages including 50 and 75% and in combination with one and two millimolar putricin improved some hyacinth traits. https://sustainagriculture.tabrizu.ac.ir/article_21411_d8d877b425825cca0bb313be10dfe6ca.pdf