Document Type : Research
Authors
1
Research Assistant Professor, Agricultural and Horticultural Sciences Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization, Shahrekord, Iran
2
Research Assistant Professor, Department of Genetics and Breeding, Date palm and tropical Research Center, Horticultural Research Center, AREEO, Ahvaz, Iran
3
Research Associate Professor, Department of Genetics and Breeding, Temperate Fruits Research Center, Horticultural Research Center, AREEO, Karaj, Iran
4
Research Assistant Professor, Agricultural and Horticultural Sciences Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization, Shahrekord, Iran.
10.22092/rhsj.2025.370508.1130
Abstract
The increasing rate of old orchards has caused a decrease in yield, an increase in pests and diseases, and a decrease in the income of gardeners, which has led to the migration to the cities. Finding a suitable solution for rejuvenating orchards through air layering, in addition to preserving the valuable genetic reserves of cultivars or old date palm genotypes, improves the economic situation by increasing the economic life of date palm trees. In this regard, the Pyarom cultivar is considered a commercial and pilot cultivar for this research, and air laying method is used for rejuvenation feasibility. 12 date palm trees of the same age (37 years old) were selected and labeled. The experiment was conducted as a randomized complete block design with four replications and one tree in each unit. The method of rejuvenating was done with three levels 1) without scraping and hormone, 2) scraping alone and 3) scraping with 8000 mg L-1 of naphthalene acetic acid (NAA) hormone. After applying the treatments, the places of treatments were covered with desirable soil, gunny and plastic. After producing enough roots, the rejuvenated palm was cut from under the rooting site and the average number of roots, length of roots and diameter of the roots at the place of laying were recorded. Then, the rejuvenated palms were transferred to the original plot. The results of this research showed that after two years, only scraping and hormone treatment caused rooting, so the average root diameter was 3.3 mm, the average root length per 100 square centimeters was 21.2 cm, and the average number of roots per 100 square cm was 42 compared to the control and scraping treatment.
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