Document Type : Original Article
Authors
1
Department of Postharvest Physiology and Technology, Ornamental Plants Research Center (OPRC), Horticultural Sciences Research Institute (HSRI), Agricultural Research, Education and Extension Organization (AREEO), Mahallat, Iran.
2
Department of Production Technology and Management, Ornamental Plants Research Center (OPRC), Horticultural Sciences Research Institute (HSRI), Agricultural Research, Education and Extension Organization (AREEO), Mahallat, Iran.
10.22091/ijpb.2025.14173.1006
Abstract
This research aimed to compare propagation methods of Amaryllis (Hippeastrum hybridum) bulbs in terms of propagation rate and bulblet yield. Accordingly, a split plot factorial design was conducted in a randomized complete block design with three replications. The main plot had 4 seasons and the factors included two cutting types of the bulb, sectioning and scoring, each with 4 and 8 cuts and four plant growth regulators (PGRs) treatments, including Ⅰ- no PGR (control), Ⅱ- indole butyric acid, Ⅲ- benzyladenine , and Ⅳ- combined use of (IBA) and (BA). The best results were obtained in spring and autumn. So that the highest number of bulblets was formed in autumn and the largest size of bulblets was formed in spring. Summer was the most inappropriate time for propagation. Regardless of the season and type of PGRs, the most number of bulblets was formed in the eight-slit scoring method, but the largest size of bulblets was obtained in the four-slit scoring, and the smallest bulblets were created in the eight-piece section method. Overall, the bulb scoring method was more suitable for propagation than the bulb sectioning method. The use of PGRs increased the number of bulbs. The use of PGRs, regardless of its type, increased the size of bulblets compared to the control. The use of IBA produced relatively larger bulblets, but there was no significant difference with the BA, the smallest bulblets were formed in the control treatment without PGRs. The largest number of bulblets was also produced by benzyladenine treatment.
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