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Effect of intensity and time of pruning on flower quantity and quality of the floribunda rose cv. Iceberg
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Mina Farrokhpour   , Nematollah Etemadi , Hamed Aalipour * |
| Tabriz University |
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Abstract: (195 Views) |
Roses are the most important cut flowers, and they are widely used in landscapes. 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 is done by cutting the shoots in the 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. 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 4th February and as medium pruning, and remaining two buds in 4th February and 6th March 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 the flowering stalk, and the number of leaves in the flowering stalk. Summer pruning increased the number of flowers in spring and summer, and also increased the length of the flowering stem and the number of leaves in summer. Late and heavy pruning on 6th March delayed the flower initiation. Pruning decreased carbohydrate content in comparison with non-pruned ones. Intensity and time of pruning had not shown a significant difference in nitrate reductase activity. In addition, heavy pruning improved photosynthesis efficiency by increasing light penetration in the plant canopy. To sum up, results suggested that heavy pruning on 4th February was the best time and severity of pruning for the floribunda rose cv Iceberg.
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| Keywords: Photosynthesis, Rose, Soluble sugar, Summer pruning, Winter pruning |
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Full-Text [PDF 634 kb]
(34 Downloads)
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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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