Document Type : scientific research article
Authors
1
Ph.D. Student of Horticulture, Gorgan University of Agricultural Sciences and Natural Resources, Dept., of Horticultural and Landscape
2
Dept. of Horticulture and Landscape
3
Department of Horticultural Science, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources (GUASNR), Gorgan, Golestan 49189-43464, Iran
4
Sari Agricultural sciences and Natural Resources-Dept. of Horticulture
Abstract
Background and objectives: urban green spaces have natural ecological value and provide entertainment and many physical and mental benefits for citizens. In the science of ornamental horticulture and green spaces, the aesthetic aspects of plants as well as their role in controlling adverse environmental conditions such as air pollution, strong winds, strong sunlight, snow and rain, and floods are considered. The Ligustrum lucidum plant is considered an excellent landscaping plant in most areas due to its resistance to pests, air pollution and wind. In addition, it grows quickly in poor soils and provides good shade. The hard rooting of this species and the long rooting process led to the design and implementation of this research.
Materials and methods: In order to investigate the effect of indole butyric acid hormone and nutritional elements iron, zinc and boron on the rooting of Ligustrum lucidum plant cuttings a factorial research was conducted based on a completely randomized design with two factors and three replications. The first factor includes different concentrations of indole butyric acid hormone (0, 50, 100, 150 parts per million) by spraying on leaves and the second factor includes three iron nutrients with concentrations (0, 4, 8, 16 parts per million), zinc with concentration of (54.0, 0.27, 0.08, 0.0 parts per million) and boron with concentration of (26.0, 26.0, 0.54, 0.0 parts per million) as irrigated fertilizer.
Results: The results showed that the highest rooting percentage and the highest number of buds and leaves were observed in the 50 ppm indole butyric acid treatment. The longest root length was affected by the treatment of indole butyric acid 100 ppm and the highest number of roots was seen in the interaction of indole butyric acid 50 ppm and boron 0.26 ppm and zinc 0.27 ppm. The concentration of 50 and 100 ppm of indole butyric acid and 1.08 ppm of zinc also caused a significant decrease in the amount of total phenol. Also, among the treatments, the lowest amount of peroxidase enzyme activity was related to the use of indole butyric acid 50 and 100 ppm and iron 4 ppm.
Conclusion: The results of the present study clearly show that the spraying treatment of indole butyric acid and its combination with some nutritional elements such as zinc, ferrous and boron can improve and accelerate the rooting process of Ligustrum lucidum cuttings, and their use in commercial nurseries can be recommended for propagation through stem cuttings.
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