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Effect of intensity and time of pruning on quantity and quality of floribunda rose (Rosa hybrida L.) cv. Iceberg
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Mina Farrokhpour   , Nematollah Etemadi , Hamed Aalipour * |
| Tabriz University |
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Abstract: (22 Views) |
Roses are the most important cut flowers and also, they are widely used in the landscape. Pruning is one of the factors that affect growth and flowering in roses. Generally, the main reason for pruning is to control the growth, flowering, and fruit production in different plants which are done by cutting shoot in correct location. This experiment was conducted to study the effect of time and severity of pruning on the quantity and quality of rose flowers in field conditions and investigate the physiological process. A factorial experiment based on a randomized complete block design (RCBD) was conducted at Isfahan University of Technology between 2014- 2015. Treatments include two levels of intensity and time of winter pruning (remaining five buds in 4thFebruary and as medium pruning and remaining two buds in 4thFebruary and 6thMarch as heavy pruning), and summer pruning (flower pruning and control), in three replications. Each replication contained two pots. Data analysis showed that heavy pruning on 4th February increased the number of flowers, flower diameter, the length of flowering-stalk and number of leaves in the flowering-stalk. Summer pruning increased the number of flowers in spring and summer, also increased the length of flower stem and the number of leaves in summer. Late and heavy pruning in 6thMarch delayed the flower initiation. Pruning decreases carbohydrate content in comparison with non-pruned ones. Intensity and time of pruning didn’t significantly differ in nitrate reductase activity. In addition, heavy pruning improved photosynthesis efficiency by increasing light penetration in plant canopy. To sum up, results suggested that heavy pruning on 4th February was the best time and severity of pruning for floribunda roses cv Iceberg.
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| Keywords: Photosynthesis, Rose, Soluble sugar, Summer pruning, Winter pruning |
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Type of Study: Research |
Subject:
Special
Received: 2022/10/23 | Accepted: 2024/08/15 | Published: 2025/08/19
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